AuroraMiddleware/gtk2
1
0
Fork 0
forked from AuroraMiddleware/gtk
Code Issues Pull Requests Projects Releases Wiki Activity
86a2156d17
gtk2/gtk/gtkgrid.c
Timm Bäder ede6f2ab59 Slightly rework clip handling 
always initialize clips to the (content) allocation, don't walk up the
widget hierarchy in gtk_widget_set_clip, implement
gtk_widget_size_allocate in GtkSeparator. This way we don't end up using
uninitialized clip values.

The entire clip handling is up for major rework since we can't and don't
want to force every single widget to call _set_clip in size-allocate
implementations.
2017-07-19 21:27:12 -04:00

2543 lines
67 KiB
C
Raw Blame History

This file contains ambiguous Unicode characters

This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

/* GTK - The GIMP Toolkit
* Copyright (C) 2010 Red Hat, Inc.
* Author: Matthias Clasen
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <string.h>
#include "gtkgrid.h"
#include "gtkorientableprivate.h"
#include "gtkrender.h"
#include "gtksizerequest.h"
#include "gtkwidgetprivate.h"
#include "gtkcontainerprivate.h"
#include "gtkcsspositionvalueprivate.h"
#include "gtkstylecontextprivate.h"
#include "gtkprivate.h"
#include "gtkintl.h"
/**
* SECTION:gtkgrid
* @Short_description: Pack widgets in rows and columns
* @Title: GtkGrid
* @See_also: #GtkBox
*
* GtkGrid is a container which arranges its child widgets in
* rows and columns. It is a very similar to #GtkBox,
* but it consistently uses #GtkWidget’s #GtkWidget:margin and #GtkWidget:expand
* properties instead of custom child properties, and it fully supports
* [height-for-width geometry management][geometry-management].
*
* Children are added using gtk_grid_attach(). They can span multiple
* rows or columns. It is also possible to add a child next to an
* existing child, using gtk_grid_attach_next_to(). The behaviour of
* GtkGrid when several children occupy the same grid cell is undefined.
*
* GtkGrid can be used like a #GtkBox by just using gtk_container_add(),
* which will place children next to each other in the direction determined
* by the #GtkOrientable:orientation property.
*
* # CSS nodes
*
* GtkGrid uses a single CSS node with name grid.
*/
typedef struct _GtkGridChild GtkGridChild;
typedef struct _GtkGridChildAttach GtkGridChildAttach;
typedef struct _GtkGridRowProperties GtkGridRowProperties;
typedef struct _GtkGridLine GtkGridLine;
typedef struct _GtkGridLines GtkGridLines;
typedef struct _GtkGridLineData GtkGridLineData;
typedef struct _GtkGridRequest GtkGridRequest;
struct _GtkGridChildAttach
{
gint pos;
gint span;
};
struct _GtkGridRowProperties
{
gint row;
GtkBaselinePosition baseline_position;
};
static const GtkGridRowProperties gtk_grid_row_properties_default = {
0,
GTK_BASELINE_POSITION_CENTER
};
struct _GtkGridChild
{
GtkWidget *widget;
GtkGridChildAttach attach[2];
};
#define CHILD_LEFT(child) ((child)->attach[GTK_ORIENTATION_HORIZONTAL].pos)
#define CHILD_WIDTH(child) ((child)->attach[GTK_ORIENTATION_HORIZONTAL].span)
#define CHILD_TOP(child) ((child)->attach[GTK_ORIENTATION_VERTICAL].pos)
#define CHILD_HEIGHT(child) ((child)->attach[GTK_ORIENTATION_VERTICAL].span)
/* A GtkGridLineData struct contains row/column specific parts
* of the grid.
*/
struct _GtkGridLineData
{
gint16 spacing;
guint homogeneous : 1;
};
struct _GtkGridPrivate
{
GList *children;
GList *row_properties;
GtkOrientation orientation;
gint baseline_row;
GtkGridLineData linedata[2];
};
#define ROWS(priv) (&(priv)->linedata[GTK_ORIENTATION_HORIZONTAL])
#define COLUMNS(priv) (&(priv)->linedata[GTK_ORIENTATION_VERTICAL])
/* A GtkGridLine struct represents a single row or column
* during size requests
*/
struct _GtkGridLine
{
gint minimum;
gint natural;
gint minimum_above;
gint minimum_below;
gint natural_above;
gint natural_below;
gint position;
gint allocation;
gint allocated_baseline;
guint need_expand : 1;
guint expand : 1;
guint empty : 1;
};
struct _GtkGridLines
{
GtkGridLine *lines;
gint min, max;
};
struct _GtkGridRequest
{
GtkGrid *grid;
GtkGridLines lines[2];
};
enum
{
PROP_0,
PROP_ROW_SPACING,
PROP_COLUMN_SPACING,
PROP_ROW_HOMOGENEOUS,
PROP_COLUMN_HOMOGENEOUS,
PROP_BASELINE_ROW,
N_PROPERTIES,
PROP_ORIENTATION
};
static GParamSpec *obj_properties[N_PROPERTIES] = { NULL, };
enum
{
CHILD_PROP_0,
CHILD_PROP_LEFT_ATTACH,
CHILD_PROP_TOP_ATTACH,
CHILD_PROP_WIDTH,
CHILD_PROP_HEIGHT,
N_CHILD_PROPERTIES
};
static GParamSpec *child_properties[N_CHILD_PROPERTIES] = { NULL, };
G_DEFINE_TYPE_WITH_CODE (GtkGrid, gtk_grid, GTK_TYPE_CONTAINER,
G_ADD_PRIVATE (GtkGrid)
G_IMPLEMENT_INTERFACE (GTK_TYPE_ORIENTABLE, NULL))
static void gtk_grid_row_properties_free (GtkGridRowProperties *props);
static void
gtk_grid_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GtkGrid *grid = GTK_GRID (object);
GtkGridPrivate *priv = grid->priv;
switch (prop_id)
{
case PROP_ORIENTATION:
g_value_set_enum (value, priv->orientation);
break;
case PROP_ROW_SPACING:
g_value_set_int (value, COLUMNS (priv)->spacing);
break;
case PROP_COLUMN_SPACING:
g_value_set_int (value, ROWS (priv)->spacing);
break;
case PROP_ROW_HOMOGENEOUS:
g_value_set_boolean (value, COLUMNS (priv)->homogeneous);
break;
case PROP_COLUMN_HOMOGENEOUS:
g_value_set_boolean (value, ROWS (priv)->homogeneous);
break;
case PROP_BASELINE_ROW:
g_value_set_int (value, priv->baseline_row);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gtk_grid_set_orientation (GtkGrid *grid,
GtkOrientation orientation)
{
GtkGridPrivate *priv = grid->priv;
if (priv->orientation != orientation)
{
priv->orientation = orientation;
_gtk_orientable_set_style_classes (GTK_ORIENTABLE (grid));
g_object_notify (G_OBJECT (grid), "orientation");
}
}
static void
gtk_grid_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
GtkGrid *grid = GTK_GRID (object);
switch (prop_id)
{
case PROP_ORIENTATION:
gtk_grid_set_orientation (grid, g_value_get_enum (value));
break;
case PROP_ROW_SPACING:
gtk_grid_set_row_spacing (grid, g_value_get_int (value));
break;
case PROP_COLUMN_SPACING:
gtk_grid_set_column_spacing (grid, g_value_get_int (value));
break;
case PROP_ROW_HOMOGENEOUS:
gtk_grid_set_row_homogeneous (grid, g_value_get_boolean (value));
break;
case PROP_COLUMN_HOMOGENEOUS:
gtk_grid_set_column_homogeneous (grid, g_value_get_boolean (value));
break;
case PROP_BASELINE_ROW:
gtk_grid_set_baseline_row (grid, g_value_get_int (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static GtkGridChild *
find_grid_child (GtkGrid *grid,
GtkWidget *widget)
{
GtkGridPrivate *priv = grid->priv;
GtkGridChild *child;
GList *list;
for (list = priv->children; list; list = list->next)
{
child = list->data;
if (child->widget == widget)
return child;
}
return NULL;
}
static void
gtk_grid_get_child_property (GtkContainer *container,
GtkWidget *child,
guint property_id,
GValue *value,
GParamSpec *pspec)
{
GtkGrid *grid = GTK_GRID (container);
GtkGridChild *grid_child;
grid_child = find_grid_child (grid, child);
if (grid_child == NULL)
{
GTK_CONTAINER_WARN_INVALID_CHILD_PROPERTY_ID (container, property_id, pspec);
return;
}
switch (property_id)
{
case CHILD_PROP_LEFT_ATTACH:
g_value_set_int (value, CHILD_LEFT (grid_child));
break;
case CHILD_PROP_TOP_ATTACH:
g_value_set_int (value, CHILD_TOP (grid_child));
break;
case CHILD_PROP_WIDTH:
g_value_set_int (value, CHILD_WIDTH (grid_child));
break;
case CHILD_PROP_HEIGHT:
g_value_set_int (value, CHILD_HEIGHT (grid_child));
break;
default:
GTK_CONTAINER_WARN_INVALID_CHILD_PROPERTY_ID (container, property_id, pspec);
break;
}
}
static void
gtk_grid_set_child_property (GtkContainer *container,
GtkWidget *child,
guint property_id,
const GValue *value,
GParamSpec *pspec)
{
GtkGrid *grid = GTK_GRID (container);
GtkGridChild *grid_child;
grid_child = find_grid_child (grid, child);
if (grid_child == NULL)
{
GTK_CONTAINER_WARN_INVALID_CHILD_PROPERTY_ID (container, property_id, pspec);
return;
}
switch (property_id)
{
case CHILD_PROP_LEFT_ATTACH:
CHILD_LEFT (grid_child) = g_value_get_int (value);
break;
case CHILD_PROP_TOP_ATTACH:
CHILD_TOP (grid_child) = g_value_get_int (value);
break;
case CHILD_PROP_WIDTH:
CHILD_WIDTH (grid_child) = g_value_get_int (value);
break;
case CHILD_PROP_HEIGHT:
CHILD_HEIGHT (grid_child) = g_value_get_int (value);
break;
default:
GTK_CONTAINER_WARN_INVALID_CHILD_PROPERTY_ID (container, property_id, pspec);
break;
}
if (_gtk_widget_get_visible (child) &&
_gtk_widget_get_visible (GTK_WIDGET (grid)))
gtk_widget_queue_resize (child);
}
static void
gtk_grid_finalize (GObject *object)
{
GtkGrid *grid = GTK_GRID (object);
GtkGridPrivate *priv = grid->priv;
g_list_free_full (priv->row_properties, (GDestroyNotify)gtk_grid_row_properties_free);
G_OBJECT_CLASS (gtk_grid_parent_class)->finalize (object);
}
static void
grid_attach (GtkGrid *grid,
GtkWidget *widget,
gint left,
gint top,
gint width,
gint height)
{
GtkGridPrivate *priv = grid->priv;
GtkGridChild *child;
child = g_slice_new (GtkGridChild);
child->widget = widget;
CHILD_LEFT (child) = left;
CHILD_TOP (child) = top;
CHILD_WIDTH (child) = width;
CHILD_HEIGHT (child) = height;
priv->children = g_list_prepend (priv->children, child);
gtk_widget_set_parent (widget, GTK_WIDGET (grid));
}
/* Find the position 'touching' existing
* children. @orientation and @max determine
* from which direction to approach (horizontal
* + max = right, vertical + !max = top, etc).
* @op_pos, @op_span determine the rows/columns
* in which the touching has to happen.
*/
static gint
find_attach_position (GtkGrid *grid,
GtkOrientation orientation,
gint op_pos,
gint op_span,
gboolean max)
{
GtkGridPrivate *priv = grid->priv;
GtkGridChild *grid_child;
GtkGridChildAttach *attach;
GtkGridChildAttach *opposite;
GList *list;
gint pos;
gboolean hit;
if (max)
pos = -G_MAXINT;
else
pos = G_MAXINT;
hit = FALSE;
for (list = priv->children; list; list = list->next)
{
grid_child = list->data;
attach = &grid_child->attach[orientation];
opposite = &grid_child->attach[1 - orientation];
/* check if the ranges overlap */
if (opposite->pos <= op_pos + op_span && op_pos <= opposite->pos + opposite->span)
{
hit = TRUE;
if (max)
pos = MAX (pos, attach->pos + attach->span);
else
pos = MIN (pos, attach->pos);
}
}
if (!hit)
pos = 0;
return pos;
}
static void
gtk_grid_add (GtkContainer *container,
GtkWidget *child)
{
GtkGrid *grid = GTK_GRID (container);
GtkGridPrivate *priv = grid->priv;
gint pos[2] = { 0, 0 };
pos[priv->orientation] = find_attach_position (grid, priv->orientation, 0, 1, TRUE);
grid_attach (grid, child, pos[0], pos[1], 1, 1);
}
static void
gtk_grid_remove (GtkContainer *container,
GtkWidget *child)
{
GtkGrid *grid = GTK_GRID (container);
GtkGridPrivate *priv = grid->priv;
GtkGridChild *grid_child;
GList *list;
for (list = priv->children; list; list = list->next)
{
grid_child = list->data;
if (grid_child->widget == child)
{
gboolean was_visible = _gtk_widget_get_visible (child);
gtk_widget_unparent (child);
priv->children = g_list_remove (priv->children, grid_child);
g_slice_free (GtkGridChild, grid_child);
if (was_visible && _gtk_widget_get_visible (GTK_WIDGET (grid)))
gtk_widget_queue_resize (GTK_WIDGET (grid));
break;
}
}
}
static void
gtk_grid_forall (GtkContainer *container,
GtkCallback callback,
gpointer callback_data)
{
GtkGrid *grid = GTK_GRID (container);
GtkGridPrivate *priv = grid->priv;
GtkGridChild *child;
GList *list;
list = priv->children;
while (list)
{
child = list->data;
list = list->next;
(* callback) (child->widget, callback_data);
}
}
static GType
gtk_grid_child_type (GtkContainer *container)
{
return GTK_TYPE_WIDGET;
}
static int
get_spacing (GtkGrid *grid,
GtkOrientation orientation)
{
GtkGridPrivate *priv = grid->priv;
GtkCssValue *border_spacing;
gint css_spacing;
border_spacing = _gtk_style_context_peek_property (gtk_widget_get_style_context (GTK_WIDGET (grid)), GTK_CSS_PROPERTY_BORDER_SPACING);
if (orientation == GTK_ORIENTATION_HORIZONTAL)
css_spacing = _gtk_css_position_value_get_x (border_spacing, 100);
else
css_spacing = _gtk_css_position_value_get_y (border_spacing, 100);
return css_spacing + priv->linedata[orientation].spacing;
}
/* Calculates the min and max numbers for both orientations.
*/
static void
gtk_grid_request_count_lines (GtkGridRequest *request)
{
GtkGridPrivate *priv = request->grid->priv;
GtkGridChild *child;
GtkGridChildAttach *attach;
GList *list;
gint min[2];
gint max[2];
min[0] = min[1] = G_MAXINT;
max[0] = max[1] = G_MININT;
for (list = priv->children; list; list = list->next)
{
child = list->data;
attach = child->attach;
min[0] = MIN (min[0], attach[0].pos);
max[0] = MAX (max[0], attach[0].pos + attach[0].span);
min[1] = MIN (min[1], attach[1].pos);
max[1] = MAX (max[1], attach[1].pos + attach[1].span);
}
request->lines[0].min = min[0];
request->lines[0].max = max[0];
request->lines[1].min = min[1];
request->lines[1].max = max[1];
}
/* Sets line sizes to 0 and marks lines as expand
* if they have a non-spanning expanding child.
*/
static void
gtk_grid_request_init (GtkGridRequest *request,
GtkOrientation orientation)
{
GtkGridPrivate *priv = request->grid->priv;
GtkGridChild *child;
GtkGridChildAttach *attach;
GtkGridLines *lines;
GList *list;
gint i;
lines = &request->lines[orientation];
for (i = 0; i < lines->max - lines->min; i++)
{
lines->lines[i].minimum = 0;
lines->lines[i].natural = 0;
lines->lines[i].minimum_above = -1;
lines->lines[i].minimum_below = -1;
lines->lines[i].natural_above = -1;
lines->lines[i].natural_below = -1;
lines->lines[i].expand = FALSE;
lines->lines[i].empty = TRUE;
}
for (list = priv->children; list; list = list->next)
{
child = list->data;
attach = &child->attach[orientation];
if (attach->span == 1 && gtk_widget_compute_expand (child->widget, orientation))
lines->lines[attach->pos - lines->min].expand = TRUE;
}
}
/* Sums allocations for lines spanned by child and their spacing.
*/
static gint
compute_allocation_for_child (GtkGridRequest *request,
GtkGridChild *child,
GtkOrientation orientation)
{
GtkGridLines *lines;
GtkGridLine *line;
GtkGridChildAttach *attach;
gint size;
gint i;
lines = &request->lines[orientation];
attach = &child->attach[orientation];
size = (attach->span - 1) * get_spacing (request->grid, orientation);
for (i = 0; i < attach->span; i++)
{
line = &lines->lines[attach->pos - lines->min + i];
size += line->allocation;
}
return size;
}
static void
compute_request_for_child (GtkGridRequest *request,
GtkGridChild *child,
GtkOrientation orientation,
gboolean contextual,
gint *minimum,
gint *natural,
gint *minimum_baseline,
gint *natural_baseline)
{
if (minimum_baseline)
*minimum_baseline = -1;
if (natural_baseline)
*natural_baseline = -1;
if (contextual)
{
gint size;
size = compute_allocation_for_child (request, child, 1 - orientation);
gtk_widget_measure (child->widget,
orientation,
size,
minimum, natural,
minimum_baseline, natural_baseline);
}
else
{
gtk_widget_measure (child->widget,
orientation,
-1,
minimum, natural,
minimum_baseline, natural_baseline);
}
}
/* Sets requisition to max. of non-spanning children.
* If contextual is TRUE, requires allocations of
* lines in the opposite orientation to be set.
*/
static void
gtk_grid_request_non_spanning (GtkGridRequest *request,
GtkOrientation orientation,
gboolean contextual)
{
GtkGridPrivate *priv = request->grid->priv;
GtkGridChild *child;
GtkGridChildAttach *attach;
GtkGridLines *lines;
GtkGridLine *line;
GList *list;
gint i;
GtkBaselinePosition baseline_pos;
gint minimum, minimum_baseline;
gint natural, natural_baseline;
lines = &request->lines[orientation];
for (list = priv->children; list; list = list->next)
{
child = list->data;
if (!_gtk_widget_get_visible (child->widget))
continue;
attach = &child->attach[orientation];
if (attach->span != 1)
continue;
compute_request_for_child (request, child, orientation, contextual, &minimum, &natural, &minimum_baseline, &natural_baseline);
line = &lines->lines[attach->pos - lines->min];
if (minimum_baseline != -1)
{
line->minimum_above = MAX (line->minimum_above, minimum_baseline);
line->minimum_below = MAX (line->minimum_below, minimum - minimum_baseline);
line->natural_above = MAX (line->natural_above, natural_baseline);
line->natural_below = MAX (line->natural_below, natural - natural_baseline);
}
else
{
line->minimum = MAX (line->minimum, minimum);
line->natural = MAX (line->natural, natural);
}
}
for (i = 0; i < lines->max - lines->min; i++)
{
line = &lines->lines[i];
if (line->minimum_above != -1)
{
line->minimum = MAX (line->minimum, line->minimum_above + line->minimum_below);
line->natural = MAX (line->natural, line->natural_above + line->natural_below);
baseline_pos = gtk_grid_get_row_baseline_position (request->grid, i + lines->min);
switch (baseline_pos)
{
case GTK_BASELINE_POSITION_TOP:
line->minimum_above += 0;
line->minimum_below += line->minimum - (line->minimum_above + line->minimum_below);
line->natural_above += 0;
line->natural_below += line->natural - (line->natural_above + line->natural_below);
break;
case GTK_BASELINE_POSITION_CENTER:
line->minimum_above += (line->minimum - (line->minimum_above + line->minimum_below))/2;
line->minimum_below += (line->minimum - (line->minimum_above + line->minimum_below))/2;
line->natural_above += (line->natural - (line->natural_above + line->natural_below))/2;
line->natural_below += (line->natural - (line->natural_above + line->natural_below))/2;
break;
case GTK_BASELINE_POSITION_BOTTOM:
line->minimum_above += line->minimum - (line->minimum_above + line->minimum_below);
line->minimum_below += 0;
line->natural_above += line->natural - (line->natural_above + line->natural_below);
line->natural_below += 0;
break;
}
}
}
}
/* Enforce homogeneous sizes.
*/
static void
gtk_grid_request_homogeneous (GtkGridRequest *request,
GtkOrientation orientation)
{
GtkGridPrivate *priv = request->grid->priv;
GtkGridLineData *linedata;
GtkGridLines *lines;
gint minimum, natural;
gint i;
linedata = &priv->linedata[orientation];
lines = &request->lines[orientation];
if (!linedata->homogeneous)
return;
minimum = 0;
natural = 0;
for (i = 0; i < lines->max - lines->min; i++)
{
minimum = MAX (minimum, lines->lines[i].minimum);
natural = MAX (natural, lines->lines[i].natural);
}
for (i = 0; i < lines->max - lines->min; i++)
{
lines->lines[i].minimum = minimum;
lines->lines[i].natural = natural;
/* TODO: Do we want to adjust the baseline here too?
* And if so, also in the homogenous resize.
*/
}
}
/* Deals with spanning children.
* Requires expand fields of lines to be set for
* non-spanning children.
*/
static void
gtk_grid_request_spanning (GtkGridRequest *request,
GtkOrientation orientation,
gboolean contextual)
{
GtkGridPrivate *priv = request->grid->priv;
GList *list;
GtkGridChild *child;
GtkGridChildAttach *attach;
GtkGridLineData *linedata;
GtkGridLines *lines;
GtkGridLine *line;
gint minimum;
gint natural;
gint span_minimum;
gint span_natural;
gint span_expand;
gboolean force_expand;
gint spacing;
gint extra;
gint expand;
gint line_extra;
gint i;
linedata = &priv->linedata[orientation];
lines = &request->lines[orientation];
spacing = get_spacing (request->grid, orientation);
for (list = priv->children; list; list = list->next)
{
child = list->data;
if (!_gtk_widget_get_visible (child->widget))
continue;
attach = &child->attach[orientation];
if (attach->span == 1)
continue;
/* We ignore baselines for spanning children */
compute_request_for_child (request, child, orientation, contextual, &minimum, &natural, NULL, NULL);
span_minimum = (attach->span - 1) * spacing;
span_natural = (attach->span - 1) * spacing;
span_expand = 0;
force_expand = FALSE;
for (i = 0; i < attach->span; i++)
{
line = &lines->lines[attach->pos - lines->min + i];
span_minimum += line->minimum;
span_natural += line->natural;
if (line->expand)
span_expand += 1;
}
if (span_expand == 0)
{
span_expand = attach->span;
force_expand = TRUE;
}
/* If we need to request more space for this child to fill
* its requisition, then divide up the needed space amongst the
* lines it spans, favoring expandable lines if any.
*
* When doing homogeneous allocation though, try to keep the
* line allocations even, since we're going to force them to
* be the same anyway, and we don't want to introduce unnecessary
* extra space.
*/
if (span_minimum < minimum)
{
if (linedata->homogeneous)
{
gint total, m;
total = minimum - (attach->span - 1) * spacing;
m = total / attach->span + (total % attach->span ? 1 : 0);
for (i = 0; i < attach->span; i++)
{
line = &lines->lines[attach->pos - lines->min + i];
line->minimum = MAX(line->minimum, m);
}
}
else
{
extra = minimum - span_minimum;
expand = span_expand;
for (i = 0; i < attach->span; i++)
{
line = &lines->lines[attach->pos - lines->min + i];
if (force_expand || line->expand)
{
line_extra = extra / expand;
line->minimum += line_extra;
extra -= line_extra;
expand -= 1;
}
}
}
}
if (span_natural < natural)
{
if (linedata->homogeneous)
{
gint total, n;
total = natural - (attach->span - 1) * spacing;
n = total / attach->span + (total % attach->span ? 1 : 0);
for (i = 0; i < attach->span; i++)
{
line = &lines->lines[attach->pos - lines->min + i];
line->natural = MAX(line->natural, n);
}
}
else
{
extra = natural - span_natural;
expand = span_expand;
for (i = 0; i < attach->span; i++)
{
line = &lines->lines[attach->pos - lines->min + i];
if (force_expand || line->expand)
{
line_extra = extra / expand;
line->natural += line_extra;
extra -= line_extra;
expand -= 1;
}
}
}
}
}
}
/* Marks empty and expanding lines and counts them.
*/
static void
gtk_grid_request_compute_expand (GtkGridRequest *request,
GtkOrientation orientation,
gint min,
gint max,
gint *nonempty_lines,
gint *expand_lines)
{
GtkGridPrivate *priv = request->grid->priv;
GtkGridChild *child;
GtkGridChildAttach *attach;
GList *list;
gint i;
GtkGridLines *lines;
GtkGridLine *line;
gboolean has_expand;
gint expand;
gint empty;
lines = &request->lines[orientation];
min = MAX (min, lines->min);
max = MIN (max, lines->max);
for (i = min - lines->min; i < max - lines->min; i++)
{
lines->lines[i].need_expand = FALSE;
lines->lines[i].expand = FALSE;
lines->lines[i].empty = TRUE;
}
for (list = priv->children; list; list = list->next)
{
child = list->data;
if (!_gtk_widget_get_visible (child->widget))
continue;
attach = &child->attach[orientation];
if (attach->span != 1)
continue;
if (attach->pos >= max || attach->pos < min)
continue;
line = &lines->lines[attach->pos - lines->min];
line->empty = FALSE;
if (gtk_widget_compute_expand (child->widget, orientation))
line->expand = TRUE;
}
for (list = priv->children; list; list = list->next)
{
child = list->data;
if (!_gtk_widget_get_visible (child->widget))
continue;
attach = &child->attach[orientation];
if (attach->span == 1)
continue;
has_expand = FALSE;
for (i = 0; i < attach->span; i++)
{
line = &lines->lines[attach->pos - lines->min + i];
if (line->expand)
has_expand = TRUE;
if (attach->pos + i >= max || attach->pos + 1 < min)
continue;
line->empty = FALSE;
}
if (!has_expand && gtk_widget_compute_expand (child->widget, orientation))
{
for (i = 0; i < attach->span; i++)
{
if (attach->pos + i >= max || attach->pos + 1 < min)
continue;
line = &lines->lines[attach->pos - lines->min + i];
line->need_expand = TRUE;
}
}
}
empty = 0;
expand = 0;
for (i = min - lines->min; i < max - lines->min; i++)
{
line = &lines->lines[i];
if (line->need_expand)
line->expand = TRUE;
if (line->empty)
empty += 1;
if (line->expand)
expand += 1;
}
if (nonempty_lines)
*nonempty_lines = max - min - empty;
if (expand_lines)
*expand_lines = expand;
}
/* Sums the minimum and natural fields of lines and their spacing.
*/
static void
gtk_grid_request_sum (GtkGridRequest *request,
GtkOrientation orientation,
gint *minimum,
gint *natural,
gint *minimum_baseline,
gint *natural_baseline)
{
GtkGridPrivate *priv = request->grid->priv;
GtkGridLines *lines;
gint i;
gint min, nat;
gint nonempty;
gint spacing;
gtk_grid_request_compute_expand (request, orientation, G_MININT, G_MAXINT, &nonempty, NULL);
lines = &request->lines[orientation];
spacing = get_spacing (request->grid, orientation);
min = 0;
nat = 0;
for (i = 0; i < lines->max - lines->min; i++)
{
if (orientation == GTK_ORIENTATION_VERTICAL &&
lines->min + i == priv->baseline_row &&
lines->lines[i].minimum_above != -1)
{
if (minimum_baseline)
*minimum_baseline = min + lines->lines[i].minimum_above;
if (natural_baseline)
*natural_baseline = nat + lines->lines[i].natural_above;
}
min += lines->lines[i].minimum;
nat += lines->lines[i].natural;
if (!lines->lines[i].empty)
{
min += spacing;
nat += spacing;
}
}
/* Remove last spacing, if any was applied */
if (nonempty > 0)
{
min -= spacing;
nat -= spacing;
}
*minimum = min;
*natural = nat;
}
/* Computes minimum and natural fields of lines.
* When contextual is TRUE, requires allocation of
* lines in the opposite orientation to be set.
*/
static void
gtk_grid_request_run (GtkGridRequest *request,
GtkOrientation orientation,
gboolean contextual)
{
gtk_grid_request_init (request, orientation);
gtk_grid_request_non_spanning (request, orientation, contextual);
gtk_grid_request_homogeneous (request, orientation);
gtk_grid_request_spanning (request, orientation, contextual);
gtk_grid_request_homogeneous (request, orientation);
}
static void
gtk_grid_distribute_non_homogeneous (GtkGridLines *lines,
gint nonempty,
gint expand,
gint size,
gint min,
gint max)
{
GtkRequestedSize *sizes;
GtkGridLine *line;
gint extra;
gint rest;
int i, j;
if (nonempty == 0)
return;
sizes = g_newa (GtkRequestedSize, nonempty);
j = 0;
for (i = min - lines->min; i < max - lines->min; i++)
{
line = &lines->lines[i];
if (line->empty)
continue;
size -= line->minimum;
sizes[j].minimum_size = line->minimum;
sizes[j].natural_size = line->natural;
sizes[j].data = line;
j++;
}
size = gtk_distribute_natural_allocation (MAX (0, size), nonempty, sizes);
if (expand > 0)
{
extra = size / expand;
rest = size % expand;
}
else
{
extra = 0;
rest = 0;
}
j = 0;
for (i = min - lines->min; i < max - lines->min; i++)
{
line = &lines->lines[i];
if (line->empty)
continue;
g_assert (line == sizes[j].data);
line->allocation = sizes[j].minimum_size;
if (line->expand)
{
line->allocation += extra;
if (rest > 0)
{
line->allocation += 1;
rest -= 1;
}
}
j++;
}
}
/* Requires that the minimum and natural fields of lines
* have been set, computes the allocation field of lines
* by distributing total_size among lines.
*/
static void
gtk_grid_request_allocate (GtkGridRequest *request,
GtkOrientation orientation,
gint total_size)
{
GtkGridPrivate *priv = request->grid->priv;
GtkGridLineData *linedata;
GtkGridLines *lines;
GtkGridLine *line;
gint nonempty1, nonempty2;
gint expand1, expand2;
gint i;
GtkBaselinePosition baseline_pos;
gint baseline;
gint extra, extra2;
gint rest;
gint size1, size2;
gint split, split_pos;
gint spacing;
linedata = &priv->linedata[orientation];
lines = &request->lines[orientation];
spacing = get_spacing (request->grid, orientation);
baseline = gtk_widget_get_allocated_baseline (GTK_WIDGET (request->grid));
if (orientation == GTK_ORIENTATION_VERTICAL && baseline != -1 &&
priv->baseline_row >= lines->min && priv->baseline_row < lines->max &&
lines->lines[priv->baseline_row - lines->min].minimum_above != -1)
{
split = priv->baseline_row;
split_pos = baseline - lines->lines[priv->baseline_row - lines->min].minimum_above;
gtk_grid_request_compute_expand (request, orientation, lines->min, split, &nonempty1, &expand1);
gtk_grid_request_compute_expand (request, orientation, split, lines->max, &nonempty2, &expand2);
if (nonempty2 > 0)
{
size1 = split_pos - (nonempty1) * spacing;
size2 = (total_size - split_pos) - (nonempty2 - 1) * spacing;
}
else
{
size1 = total_size - (nonempty1 - 1) * spacing;
size2 = 0;
}
}
else
{
gtk_grid_request_compute_expand (request, orientation, lines->min, lines->max, &nonempty1, &expand1);
nonempty2 = expand2 = 0;
split = lines->max;
size1 = total_size - (nonempty1 - 1) * spacing;
size2 = 0;
}
if (nonempty1 == 0 && nonempty2 == 0)
return;
if (linedata->homogeneous)
{
if (nonempty1 > 0)
{
extra = size1 / nonempty1;
rest = size1 % nonempty1;
}
else
{
extra = 0;
rest = 0;
}
if (nonempty2 > 0)
{
extra2 = size2 / nonempty2;
if (extra2 < extra || nonempty1 == 0)
{
extra = extra2;
rest = size2 % nonempty2;
}
}
for (i = 0; i < lines->max - lines->min; i++)
{
line = &lines->lines[i];
if (line->empty)
continue;
line->allocation = extra;
if (rest > 0)
{
line->allocation += 1;
rest -= 1;
}
}
}
else
{
gtk_grid_distribute_non_homogeneous (lines,
nonempty1,
expand1,
size1,
lines->min,
split);
gtk_grid_distribute_non_homogeneous (lines,
nonempty2,
expand2,
size2,
split,
lines->max);
}
for (i = 0; i < lines->max - lines->min; i++)
{
line = &lines->lines[i];
if (line->empty)
continue;
if (line->minimum_above != -1)
{
/* Note: This is overridden in gtk_grid_request_position for the allocated baseline */
baseline_pos = gtk_grid_get_row_baseline_position (request->grid, i + lines->min);
switch (baseline_pos)
{
case GTK_BASELINE_POSITION_TOP:
line->allocated_baseline =
line->minimum_above;
break;
case GTK_BASELINE_POSITION_CENTER:
line->allocated_baseline =
line->minimum_above +
(line->allocation - (line->minimum_above + line->minimum_below)) / 2;
break;
case GTK_BASELINE_POSITION_BOTTOM:
line->allocated_baseline =
line->allocation - line->minimum_below;
break;
}
}
else
line->allocated_baseline = -1;
}
}
/* Computes the position fields from allocation and spacing.
*/
static void
gtk_grid_request_position (GtkGridRequest *request,
GtkOrientation orientation)
{
GtkGridPrivate *priv = request->grid->priv;
GtkGridLines *lines;
GtkGridLine *line;
gint position, old_position;
int allocated_baseline;
gint spacing;
gint i, j;
lines = &request->lines[orientation];
spacing = get_spacing (request->grid, orientation);
allocated_baseline = gtk_widget_get_allocated_baseline (GTK_WIDGET(request->grid));
position = 0;
for (i = 0; i < lines->max - lines->min; i++)
{
line = &lines->lines[i];
if (orientation == GTK_ORIENTATION_VERTICAL &&
i + lines->min == priv->baseline_row &&
allocated_baseline != -1 &&
lines->lines[i].minimum_above != -1)
{
old_position = position;
position = allocated_baseline - line->minimum_above;
/* Back-patch previous rows */
for (j = 0; j < i; j++)
{
if (!lines->lines[j].empty)
lines->lines[j].position += position - old_position;
}
}
if (!line->empty)
{
line->position = position;
position += line->allocation + spacing;
if (orientation == GTK_ORIENTATION_VERTICAL &&
i + lines->min == priv->baseline_row &&
allocated_baseline != -1 &&
lines->lines[i].minimum_above != -1)
line->allocated_baseline = allocated_baseline - line->position;
}
}
}
static void
gtk_grid_get_size (GtkGrid *grid,
GtkOrientation orientation,
gint *minimum,
gint *natural,
gint *minimum_baseline,
gint *natural_baseline)
{
GtkGridRequest request;
GtkGridLines *lines;
*minimum = 0;
*natural = 0;
if (minimum_baseline)
*minimum_baseline = -1;
if (natural_baseline)
*natural_baseline = -1;
if (grid->priv->children == NULL)
return;
request.grid = grid;
gtk_grid_request_count_lines (&request);
lines = &request.lines[orientation];
lines->lines = g_newa (GtkGridLine, lines->max - lines->min);
memset (lines->lines, 0, (lines->max - lines->min) * sizeof (GtkGridLine));
gtk_grid_request_run (&request, orientation, FALSE);
gtk_grid_request_sum (&request, orientation, minimum, natural,
minimum_baseline, natural_baseline);
}
static void
gtk_grid_get_size_for_size (GtkGrid *grid,
GtkOrientation orientation,
gint size,
gint *minimum,
gint *natural,
gint *minimum_baseline,
gint *natural_baseline)
{
GtkGridRequest request;
GtkGridLines *lines;
gint min_size, nat_size;
*minimum = 0;
*natural = 0;
if (minimum_baseline)
*minimum_baseline = -1;
if (natural_baseline)
*natural_baseline = -1;
if (grid->priv->children == NULL)
return;
request.grid = grid;
gtk_grid_request_count_lines (&request);
lines = &request.lines[0];
lines->lines = g_newa (GtkGridLine, lines->max - lines->min);
memset (lines->lines, 0, (lines->max - lines->min) * sizeof (GtkGridLine));
lines = &request.lines[1];
lines->lines = g_newa (GtkGridLine, lines->max - lines->min);
memset (lines->lines, 0, (lines->max - lines->min) * sizeof (GtkGridLine));
gtk_grid_request_run (&request, 1 - orientation, FALSE);
gtk_grid_request_sum (&request, 1 - orientation, &min_size, &nat_size, NULL, NULL);
gtk_grid_request_allocate (&request, 1 - orientation, MAX (size, min_size));
gtk_grid_request_run (&request, orientation, TRUE);
gtk_grid_request_sum (&request, orientation, minimum, natural, minimum_baseline, natural_baseline);
}
static void
gtk_grid_measure (GtkWidget *widget,
GtkOrientation orientation,
int for_size,
int *minimum,
int *natural,
int *minimum_baseline,
int *natural_baseline)
{
GtkGrid *grid = GTK_GRID (widget);
if ((orientation == GTK_ORIENTATION_HORIZONTAL &&
gtk_widget_get_request_mode (widget) == GTK_SIZE_REQUEST_WIDTH_FOR_HEIGHT) ||
(orientation == GTK_ORIENTATION_VERTICAL &&
gtk_widget_get_request_mode (widget) == GTK_SIZE_REQUEST_HEIGHT_FOR_WIDTH))
gtk_grid_get_size_for_size (grid, orientation, for_size, minimum, natural, minimum_baseline, natural_baseline);
else
gtk_grid_get_size (grid, orientation, minimum, natural, minimum_baseline, natural_baseline);
}
static void
allocate_child (GtkGridRequest *request,
GtkOrientation orientation,
GtkGridChild *child,
gint *position,
gint *size,
gint *baseline)
{
GtkGridLines *lines;
GtkGridLine *line;
GtkGridChildAttach *attach;
gint i;
lines = &request->lines[orientation];
attach = &child->attach[orientation];
*position = lines->lines[attach->pos - lines->min].position;
if (attach->span == 1)
*baseline = lines->lines[attach->pos - lines->min].allocated_baseline;
else
*baseline = -1;
*size = (attach->span - 1) * get_spacing (request->grid, orientation);
for (i = 0; i < attach->span; i++)
{
line = &lines->lines[attach->pos - lines->min + i];
*size += line->allocation;
}
}
static void
gtk_grid_request_allocate_children (GtkGridRequest *request,
const GtkAllocation *allocation,
GtkAllocation *out_clip)
{
GtkGridPrivate *priv = request->grid->priv;
GList *list;
GtkGridChild *child;
GtkAllocation child_allocation;
GtkAllocation child_clip;
gint x, y, width, height, baseline, ignore;
for (list = priv->children; list; list = list->next)
{
child = list->data;
if (!_gtk_widget_get_visible (child->widget))
continue;
allocate_child (request, GTK_ORIENTATION_HORIZONTAL, child, &x, &width, &ignore);
allocate_child (request, GTK_ORIENTATION_VERTICAL, child, &y, &height, &baseline);
child_allocation.x = allocation->x + x;
child_allocation.y = allocation->y + y;
child_allocation.width = MAX (1, width);
child_allocation.height = MAX (1, height);
if (_gtk_widget_get_direction (GTK_WIDGET (request->grid)) == GTK_TEXT_DIR_RTL)
child_allocation.x = allocation->x + allocation->width
- (child_allocation.x - allocation->x) - child_allocation.width;
gtk_widget_size_allocate_with_baseline (child->widget, &child_allocation, baseline);
gtk_widget_get_clip (child->widget, &child_clip);
gdk_rectangle_union (&child_clip, out_clip, out_clip);
}
}
#define GET_SIZE(allocation, orientation) (orientation == GTK_ORIENTATION_HORIZONTAL ? allocation->width : allocation->height)
static void
gtk_grid_size_allocate (GtkWidget *widget,
GtkAllocation *allocation)
{
GtkAllocation clip = *allocation;
GtkAllocation children_clip = *allocation;
GtkGrid *grid = GTK_GRID (widget);
GtkGridPrivate *priv = grid->priv;
GtkGridRequest request;
GtkGridLines *lines;
GtkOrientation orientation;
if (priv->children == NULL)
{
gtk_widget_set_clip (widget, &clip);
return;
}
request.grid = grid;
gtk_grid_request_count_lines (&request);
lines = &request.lines[0];
lines->lines = g_newa (GtkGridLine, lines->max - lines->min);
memset (lines->lines, 0, (lines->max - lines->min) * sizeof (GtkGridLine));
lines = &request.lines[1];
lines->lines = g_newa (GtkGridLine, lines->max - lines->min);
memset (lines->lines, 0, (lines->max - lines->min) * sizeof (GtkGridLine));
if (gtk_widget_get_request_mode (widget) == GTK_SIZE_REQUEST_WIDTH_FOR_HEIGHT)
orientation = GTK_ORIENTATION_HORIZONTAL;
else
orientation = GTK_ORIENTATION_VERTICAL;
gtk_grid_request_run (&request, 1 - orientation, FALSE);
gtk_grid_request_allocate (&request, 1 - orientation, GET_SIZE (allocation, 1 - orientation));
gtk_grid_request_run (&request, orientation, TRUE);
gtk_grid_request_allocate (&request, orientation, GET_SIZE (allocation, orientation));
gtk_grid_request_position (&request, 0);
gtk_grid_request_position (&request, 1);
gtk_grid_request_allocate_children (&request, allocation, &children_clip);
gdk_rectangle_union (&children_clip, &clip, &clip);
gtk_widget_set_clip (widget, &clip);
}
static void
gtk_grid_class_init (GtkGridClass *class)
{
GObjectClass *object_class = G_OBJECT_CLASS (class);
GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
GtkContainerClass *container_class = GTK_CONTAINER_CLASS (class);
object_class->get_property = gtk_grid_get_property;
object_class->set_property = gtk_grid_set_property;
object_class->finalize = gtk_grid_finalize;
widget_class->size_allocate = gtk_grid_size_allocate;
widget_class->measure = gtk_grid_measure;
container_class->add = gtk_grid_add;
container_class->remove = gtk_grid_remove;
container_class->forall = gtk_grid_forall;
container_class->child_type = gtk_grid_child_type;
container_class->set_child_property = gtk_grid_set_child_property;
container_class->get_child_property = gtk_grid_get_child_property;
g_object_class_override_property (object_class, PROP_ORIENTATION, "orientation");
obj_properties[PROP_ROW_SPACING] =
g_param_spec_int ("row-spacing",
P_("Row spacing"),
P_("The amount of space between two consecutive rows"),
0, G_MAXINT16, 0,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
obj_properties[PROP_COLUMN_SPACING] =
g_param_spec_int ("column-spacing",
P_("Column spacing"),
P_("The amount of space between two consecutive columns"),
0, G_MAXINT16, 0,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
obj_properties[PROP_ROW_HOMOGENEOUS] =
g_param_spec_boolean ("row-homogeneous",
P_("Row Homogeneous"),
P_("If TRUE, the rows are all the same height"),
FALSE,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
obj_properties[PROP_COLUMN_HOMOGENEOUS] =
g_param_spec_boolean ("column-homogeneous",
P_("Column Homogeneous"),
P_("If TRUE, the columns are all the same width"),
FALSE,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
obj_properties[PROP_BASELINE_ROW] =
g_param_spec_int ("baseline-row",
P_("Baseline Row"),
P_("The row to align the to the baseline when valign is GTK_ALIGN_BASELINE"),
0, G_MAXINT, 0,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
g_object_class_install_properties (object_class,
N_PROPERTIES,
obj_properties);
child_properties[CHILD_PROP_LEFT_ATTACH] =
g_param_spec_int ("left-attach",
P_("Left attachment"),
P_("The column number to attach the left side of the child to"),
G_MININT, G_MAXINT, 0,
GTK_PARAM_READWRITE);
child_properties[CHILD_PROP_TOP_ATTACH] =
g_param_spec_int ("top-attach",
P_("Top attachment"),
P_("The row number to attach the top side of a child widget to"),
G_MININT, G_MAXINT, 0,
GTK_PARAM_READWRITE);
child_properties[CHILD_PROP_WIDTH] =
g_param_spec_int ("width",
P_("Width"),
P_("The number of columns that a child spans"),
1, G_MAXINT, 1,
GTK_PARAM_READWRITE);
child_properties[CHILD_PROP_HEIGHT] =
g_param_spec_int ("height",
P_("Height"),
P_("The number of rows that a child spans"),
1, G_MAXINT, 1,
GTK_PARAM_READWRITE);
gtk_container_class_install_child_properties (container_class, N_CHILD_PROPERTIES, child_properties);
gtk_widget_class_set_css_name (widget_class, "grid");
}
static void
gtk_grid_init (GtkGrid *grid)
{
GtkGridPrivate *priv;
grid->priv = gtk_grid_get_instance_private (grid);
priv = grid->priv;
gtk_widget_set_has_window (GTK_WIDGET (grid), FALSE);
gtk_widget_set_redraw_on_allocate (GTK_WIDGET (grid), FALSE);
priv->children = NULL;
priv->orientation = GTK_ORIENTATION_HORIZONTAL;
priv->baseline_row = 0;
priv->linedata[0].spacing = 0;
priv->linedata[1].spacing = 0;
priv->linedata[0].homogeneous = FALSE;
priv->linedata[1].homogeneous = FALSE;
_gtk_orientable_set_style_classes (GTK_ORIENTABLE (grid));
}
/**
* gtk_grid_new:
*
* Creates a new grid widget.
*
* Returns: the new #GtkGrid
*/
GtkWidget *
gtk_grid_new (void)
{
return g_object_new (GTK_TYPE_GRID, NULL);
}
/**
* gtk_grid_attach:
* @grid: a #GtkGrid
* @child: the widget to add
* @left: the column number to attach the left side of @child to
* @top: the row number to attach the top side of @child to
* @width: the number of columns that @child will span
* @height: the number of rows that @child will span
*
* Adds a widget to the grid.
*
* The position of @child is determined by @left and @top. The
* number of “cells” that @child will occupy is determined by
* @width and @height.
*/
void
gtk_grid_attach (GtkGrid *grid,
GtkWidget *child,
gint left,
gint top,
gint width,
gint height)
{
g_return_if_fail (GTK_IS_GRID (grid));
g_return_if_fail (GTK_IS_WIDGET (child));
g_return_if_fail (_gtk_widget_get_parent (child) == NULL);
g_return_if_fail (width > 0);
g_return_if_fail (height > 0);
grid_attach (grid, child, left, top, width, height);
}
/**
* gtk_grid_attach_next_to:
* @grid: a #GtkGrid
* @child: the widget to add
* @sibling: (allow-none): the child of @grid that @child will be placed
* next to, or %NULL to place @child at the beginning or end
* @side: the side of @sibling that @child is positioned next to
* @width: the number of columns that @child will span
* @height: the number of rows that @child will span
*
* Adds a widget to the grid.
*
* The widget is placed next to @sibling, on the side determined by
* @side. When @sibling is %NULL, the widget is placed in row (for
* left or right placement) or column 0 (for top or bottom placement),
* at the end indicated by @side.
*
* Attaching widgets labeled [1], [2], [3] with @sibling == %NULL and
* @side == %GTK_POS_LEFT yields a layout of [3][2][1].
*/
void
gtk_grid_attach_next_to (GtkGrid *grid,
GtkWidget *child,
GtkWidget *sibling,
GtkPositionType side,
gint width,
gint height)
{
GtkGridChild *grid_sibling;
gint left, top;
g_return_if_fail (GTK_IS_GRID (grid));
g_return_if_fail (GTK_IS_WIDGET (child));
g_return_if_fail (_gtk_widget_get_parent (child) == NULL);
g_return_if_fail (sibling == NULL || _gtk_widget_get_parent (sibling) == (GtkWidget*)grid);
g_return_if_fail (width > 0);
g_return_if_fail (height > 0);
if (sibling)
{
grid_sibling = find_grid_child (grid, sibling);
switch (side)
{
case GTK_POS_LEFT:
left = CHILD_LEFT (grid_sibling) - width;
top = CHILD_TOP (grid_sibling);
break;
case GTK_POS_RIGHT:
left = CHILD_LEFT (grid_sibling) + CHILD_WIDTH (grid_sibling);
top = CHILD_TOP (grid_sibling);
break;
case GTK_POS_TOP:
left = CHILD_LEFT (grid_sibling);
top = CHILD_TOP (grid_sibling) - height;
break;
case GTK_POS_BOTTOM:
left = CHILD_LEFT (grid_sibling);
top = CHILD_TOP (grid_sibling) + CHILD_HEIGHT (grid_sibling);
break;
default:
g_assert_not_reached ();
}
}
else
{
switch (side)
{
case GTK_POS_LEFT:
left = find_attach_position (grid, GTK_ORIENTATION_HORIZONTAL, 0, height, FALSE);
left -= width;
top = 0;
break;
case GTK_POS_RIGHT:
left = find_attach_position (grid, GTK_ORIENTATION_HORIZONTAL, 0, height, TRUE);
top = 0;
break;
case GTK_POS_TOP:
left = 0;
top = find_attach_position (grid, GTK_ORIENTATION_VERTICAL, 0, width, FALSE);
top -= height;
break;
case GTK_POS_BOTTOM:
left = 0;
top = find_attach_position (grid, GTK_ORIENTATION_VERTICAL, 0, width, TRUE);
break;
default:
g_assert_not_reached ();
}
}
grid_attach (grid, child, left, top, width, height);
}
/**
* gtk_grid_get_child_at:
* @grid: a #GtkGrid
* @left: the left edge of the cell
* @top: the top edge of the cell
*
* Gets the child of @grid whose area covers the grid
* cell whose upper left corner is at @left, @top.
*
* Returns: (transfer none) (nullable): the child at the given position, or %NULL
*
* Since: 3.2
*/
GtkWidget *
gtk_grid_get_child_at (GtkGrid *grid,
gint left,
gint top)
{
GtkGridPrivate *priv;
GtkGridChild *child;
GList *list;
g_return_val_if_fail (GTK_IS_GRID (grid), NULL);
priv = grid->priv;
for (list = priv->children; list; list = list->next)
{
child = list->data;
if (CHILD_LEFT (child) <= left &&
CHILD_LEFT (child) + CHILD_WIDTH (child) > left &&
CHILD_TOP (child) <= top &&
CHILD_TOP (child) + CHILD_HEIGHT (child) > top)
return child->widget;
}
return NULL;
}
/**
* gtk_grid_insert_row:
* @grid: a #GtkGrid
* @position: the position to insert the row at
*
* Inserts a row at the specified position.
*
* Children which are attached at or below this position
* are moved one row down. Children which span across this
* position are grown to span the new row.
*
* Since: 3.2
*/
void
gtk_grid_insert_row (GtkGrid *grid,
gint position)
{
GtkGridPrivate *priv;
GtkGridChild *child;
GList *list;
gint top, height;
g_return_if_fail (GTK_IS_GRID (grid));
priv = grid->priv;
for (list = priv->children; list; list = list->next)
{
child = list->data;
top = CHILD_TOP (child);
height = CHILD_HEIGHT (child);
if (top >= position)
{
CHILD_TOP (child) = top + 1;
gtk_container_child_notify_by_pspec (GTK_CONTAINER (grid),
child->widget,
child_properties[CHILD_PROP_TOP_ATTACH]);
}
else if (top + height > position)
{
CHILD_HEIGHT (child) = height + 1;
gtk_container_child_notify_by_pspec (GTK_CONTAINER (grid),
child->widget,
child_properties[CHILD_PROP_HEIGHT]);
}
}
for (list = priv->row_properties; list != NULL; list = list->next)
{
GtkGridRowProperties *prop = list->data;
if (prop->row >= position)
prop->row += 1;
}
}
/**
* gtk_grid_remove_row:
* @grid: a #GtkGrid
* @position: the position of the row to remove
*
* Removes a row from the grid.
*
* Children that are placed in this row are removed,
* spanning children that overlap this row have their
* height reduced by one, and children below the row
* are moved up.
*
* Since: 3.10
*/
void
gtk_grid_remove_row (GtkGrid *grid,
gint position)
{
GtkGridPrivate *priv;
GtkGridChild *child;
GList *list;
gint top, height;
g_return_if_fail (GTK_IS_GRID (grid));
priv = grid->priv;
list = priv->children;
while (list)
{
child = list->data;
list = list->next;
top = CHILD_TOP (child);
height = CHILD_HEIGHT (child);
if (top <= position && top + height > position)
height--;
if (top > position)
top--;
if (height <= 0)
gtk_container_remove (GTK_CONTAINER (grid), child->widget);
else
gtk_container_child_set (GTK_CONTAINER (grid), child->widget,
"height", height,
"top-attach", top,
NULL);
}
}
/**
* gtk_grid_insert_column:
* @grid: a #GtkGrid
* @position: the position to insert the column at
*
* Inserts a column at the specified position.
*
* Children which are attached at or to the right of this position
* are moved one column to the right. Children which span across this
* position are grown to span the new column.
*
* Since: 3.2
*/
void
gtk_grid_insert_column (GtkGrid *grid,
gint position)
{
GtkGridPrivate *priv;
GtkGridChild *child;
GList *list;
gint left, width;
g_return_if_fail (GTK_IS_GRID (grid));
priv = grid->priv;
for (list = priv->children; list; list = list->next)
{
child = list->data;
left = CHILD_LEFT (child);
width = CHILD_WIDTH (child);
if (left >= position)
{
CHILD_LEFT (child) = left + 1;
gtk_container_child_notify_by_pspec (GTK_CONTAINER (grid),
child->widget,
child_properties[CHILD_PROP_LEFT_ATTACH]);
}
else if (left + width > position)
{
CHILD_WIDTH (child) = width + 1;
gtk_container_child_notify_by_pspec (GTK_CONTAINER (grid),
child->widget,
child_properties[CHILD_PROP_WIDTH]);
}
}
}
/**
* gtk_grid_remove_column:
* @grid: a #GtkGrid
* @position: the position of the column to remove
*
* Removes a column from the grid.
*
* Children that are placed in this column are removed,
* spanning children that overlap this column have their
* width reduced by one, and children after the column
* are moved to the left.
*
* Since: 3.10
*/
void
gtk_grid_remove_column (GtkGrid *grid,
gint position)
{
GtkGridPrivate *priv;
GtkGridChild *child;
GList *list;
gint left, width;
g_return_if_fail (GTK_IS_GRID (grid));
priv = grid->priv;
list = priv->children;
while (list)
{
child = list->data;
list = list->next;
left = CHILD_LEFT (child);
width = CHILD_WIDTH (child);
if (left <= position && left + width > position)
width--;
if (left > position)
left--;
if (width <= 0)
gtk_container_remove (GTK_CONTAINER (grid), child->widget);
else
gtk_container_child_set (GTK_CONTAINER (grid), child->widget,
"width", width,
"left-attach", left,
NULL);
}
}
/**
* gtk_grid_insert_next_to:
* @grid: a #GtkGrid
* @sibling: the child of @grid that the new row or column will be
* placed next to
* @side: the side of @sibling that @child is positioned next to
*
* Inserts a row or column at the specified position.
*
* The new row or column is placed next to @sibling, on the side
* determined by @side. If @side is %GTK_POS_TOP or %GTK_POS_BOTTOM,
* a row is inserted. If @side is %GTK_POS_LEFT of %GTK_POS_RIGHT,
* a column is inserted.
*
* Since: 3.2
*/
void
gtk_grid_insert_next_to (GtkGrid *grid,
GtkWidget *sibling,
GtkPositionType side)
{
GtkGridChild *child;
g_return_if_fail (GTK_IS_GRID (grid));
g_return_if_fail (GTK_IS_WIDGET (sibling));
g_return_if_fail (_gtk_widget_get_parent (sibling) == (GtkWidget*)grid);
child = find_grid_child (grid, sibling);
switch (side)
{
case GTK_POS_LEFT:
gtk_grid_insert_column (grid, CHILD_LEFT (child));
break;
case GTK_POS_RIGHT:
gtk_grid_insert_column (grid, CHILD_LEFT (child) + CHILD_WIDTH (child));
break;
case GTK_POS_TOP:
gtk_grid_insert_row (grid, CHILD_TOP (child));
break;
case GTK_POS_BOTTOM:
gtk_grid_insert_row (grid, CHILD_TOP (child) + CHILD_HEIGHT (child));
break;
default:
g_assert_not_reached ();
}
}
/**
* gtk_grid_set_row_homogeneous:
* @grid: a #GtkGrid
* @homogeneous: %TRUE to make rows homogeneous
*
* Sets whether all rows of @grid will have the same height.
*/
void
gtk_grid_set_row_homogeneous (GtkGrid *grid,
gboolean homogeneous)
{
GtkGridPrivate *priv;
g_return_if_fail (GTK_IS_GRID (grid));
priv = grid->priv;
/* Yes, homogeneous rows means all the columns have the same size */
if (COLUMNS (priv)->homogeneous != homogeneous)
{
COLUMNS (priv)->homogeneous = homogeneous;
if (_gtk_widget_get_visible (GTK_WIDGET (grid)))
gtk_widget_queue_resize (GTK_WIDGET (grid));
g_object_notify_by_pspec (G_OBJECT (grid), obj_properties [PROP_ROW_HOMOGENEOUS]);
}
}
/**
* gtk_grid_get_row_homogeneous:
* @grid: a #GtkGrid
*
* Returns whether all rows of @grid have the same height.
*
* Returns: whether all rows of @grid have the same height.
*/
gboolean
gtk_grid_get_row_homogeneous (GtkGrid *grid)
{
GtkGridPrivate *priv;
g_return_val_if_fail (GTK_IS_GRID (grid), FALSE);
priv = grid->priv;
return COLUMNS (priv)->homogeneous;
}
/**
* gtk_grid_set_column_homogeneous:
* @grid: a #GtkGrid
* @homogeneous: %TRUE to make columns homogeneous
*
* Sets whether all columns of @grid will have the same width.
*/
void
gtk_grid_set_column_homogeneous (GtkGrid *grid,
gboolean homogeneous)
{
GtkGridPrivate *priv;
g_return_if_fail (GTK_IS_GRID (grid));
priv = grid->priv;
/* Yes, homogeneous columns means all the rows have the same size */
if (ROWS (priv)->homogeneous != homogeneous)
{
ROWS (priv)->homogeneous = homogeneous;
if (_gtk_widget_get_visible (GTK_WIDGET (grid)))
gtk_widget_queue_resize (GTK_WIDGET (grid));
g_object_notify_by_pspec (G_OBJECT (grid), obj_properties [PROP_COLUMN_HOMOGENEOUS]);
}
}
/**
* gtk_grid_get_column_homogeneous:
* @grid: a #GtkGrid
*
* Returns whether all columns of @grid have the same width.
*
* Returns: whether all columns of @grid have the same width.
*/
gboolean
gtk_grid_get_column_homogeneous (GtkGrid *grid)
{
GtkGridPrivate *priv;
g_return_val_if_fail (GTK_IS_GRID (grid), FALSE);
priv = grid->priv;
return ROWS (priv)->homogeneous;
}
/**
* gtk_grid_set_row_spacing:
* @grid: a #GtkGrid
* @spacing: the amount of space to insert between rows
*
* Sets the amount of space between rows of @grid.
*/
void
gtk_grid_set_row_spacing (GtkGrid *grid,
guint spacing)
{
GtkGridPrivate *priv;
g_return_if_fail (GTK_IS_GRID (grid));
g_return_if_fail (spacing <= G_MAXINT16);
priv = grid->priv;
if (COLUMNS (priv)->spacing != spacing)
{
COLUMNS (priv)->spacing = spacing;
if (_gtk_widget_get_visible (GTK_WIDGET (grid)))
gtk_widget_queue_resize (GTK_WIDGET (grid));
g_object_notify_by_pspec (G_OBJECT (grid), obj_properties [PROP_ROW_SPACING]);
}
}
/**
* gtk_grid_get_row_spacing:
* @grid: a #GtkGrid
*
* Returns the amount of space between the rows of @grid.
*
* Returns: the row spacing of @grid
*/
guint
gtk_grid_get_row_spacing (GtkGrid *grid)
{
GtkGridPrivate *priv;
g_return_val_if_fail (GTK_IS_GRID (grid), 0);
priv = grid->priv;
return COLUMNS (priv)->spacing;
}
/**
* gtk_grid_set_column_spacing:
* @grid: a #GtkGrid
* @spacing: the amount of space to insert between columns
*
* Sets the amount of space between columns of @grid.
*/
void
gtk_grid_set_column_spacing (GtkGrid *grid,
guint spacing)
{
GtkGridPrivate *priv;
g_return_if_fail (GTK_IS_GRID (grid));
g_return_if_fail (spacing <= G_MAXINT16);
priv = grid->priv;
if (ROWS (priv)->spacing != spacing)
{
ROWS (priv)->spacing = spacing;
if (_gtk_widget_get_visible (GTK_WIDGET (grid)))
gtk_widget_queue_resize (GTK_WIDGET (grid));
g_object_notify_by_pspec (G_OBJECT (grid), obj_properties [PROP_COLUMN_SPACING]);
}
}
/**
* gtk_grid_get_column_spacing:
* @grid: a #GtkGrid
*
* Returns the amount of space between the columns of @grid.
*
* Returns: the column spacing of @grid
*/
guint
gtk_grid_get_column_spacing (GtkGrid *grid)
{
GtkGridPrivate *priv;
g_return_val_if_fail (GTK_IS_GRID (grid), 0);
priv = grid->priv;
return ROWS (priv)->spacing;
}
static GtkGridRowProperties *
find_row_properties (GtkGrid *grid,
gint row)
{
GList *l;
for (l = grid->priv->row_properties; l != NULL; l = l->next)
{
GtkGridRowProperties *prop = l->data;
if (prop->row == row)
return prop;
}
return NULL;
}
static void
gtk_grid_row_properties_free (GtkGridRowProperties *props)
{
g_slice_free (GtkGridRowProperties, props);
}
static GtkGridRowProperties *
get_row_properties_or_create (GtkGrid *grid,
gint row)
{
GtkGridRowProperties *props;
GtkGridPrivate *priv = grid->priv;
props = find_row_properties (grid, row);
if (props)
return props;
props = g_slice_new (GtkGridRowProperties);
*props = gtk_grid_row_properties_default;
props->row = row;
priv->row_properties =
g_list_prepend (priv->row_properties, props);
return props;
}
static const GtkGridRowProperties *
get_row_properties_or_default (GtkGrid *grid,
gint row)
{
GtkGridRowProperties *props;
props = find_row_properties (grid, row);
if (props)
return props;
return &gtk_grid_row_properties_default;
}
/**
* gtk_grid_set_row_baseline_position:
* @grid: a #GtkGrid
* @row: a row index
* @pos: a #GtkBaselinePosition
*
* Sets how the baseline should be positioned on @row of the
* grid, in case that row is assigned more space than is requested.
*
* Since: 3.10
*/
void
gtk_grid_set_row_baseline_position (GtkGrid *grid,
gint row,
GtkBaselinePosition pos)
{
GtkGridRowProperties *props;
g_return_if_fail (GTK_IS_GRID (grid));
props = get_row_properties_or_create (grid, row);
if (props->baseline_position != pos)
{
props->baseline_position = pos;
if (_gtk_widget_get_visible (GTK_WIDGET (grid)))
gtk_widget_queue_resize (GTK_WIDGET (grid));
}
}
/**
* gtk_grid_get_row_baseline_position:
* @grid: a #GtkGrid
* @row: a row index
*
* Returns the baseline position of @row as set
* by gtk_grid_set_row_baseline_position() or the default value
* %GTK_BASELINE_POSITION_CENTER.
*
* Returns: the baseline position of @row
*
* Since: 3.10
*/
GtkBaselinePosition
gtk_grid_get_row_baseline_position (GtkGrid *grid,
gint row)
{
const GtkGridRowProperties *props;
g_return_val_if_fail (GTK_IS_GRID (grid), GTK_BASELINE_POSITION_CENTER);
props = get_row_properties_or_default (grid, row);
return props->baseline_position;
}
/**
* gtk_grid_set_baseline_row:
* @grid: a #GtkGrid
* @row: the row index
*
* Sets which row defines the global baseline for the entire grid.
* Each row in the grid can have its own local baseline, but only
* one of those is global, meaning it will be the baseline in the
* parent of the @grid.
*
* Since: 3.10
*/
void
gtk_grid_set_baseline_row (GtkGrid *grid,
gint row)
{
GtkGridPrivate *priv;
g_return_if_fail (GTK_IS_GRID (grid));
priv = grid->priv;
if (priv->baseline_row != row)
{
priv->baseline_row = row;
if (_gtk_widget_get_visible (GTK_WIDGET (grid)))
gtk_widget_queue_resize (GTK_WIDGET (grid));
g_object_notify (G_OBJECT (grid), "baseline-row");
}
}
/**
* gtk_grid_get_baseline_row:
* @grid: a #GtkGrid
*
* Returns which row defines the global baseline of @grid.
*
* Returns: the row index defining the global baseline
*
* Since: 3.10
*/
gint
gtk_grid_get_baseline_row (GtkGrid *grid)
{
GtkGridPrivate *priv;
g_return_val_if_fail (GTK_IS_GRID (grid), 0);
priv = grid->priv;
return priv->baseline_row;
}
Reference in New Issue View Git Blame Copy Permalink