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gtk2/gtk/gtkframe.c

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/* GTK - The GIMP Toolkit
* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
*
* 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, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/*
* Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
* file for a list of people on the GTK+ Team. See the ChangeLog
* files for a list of changes. These files are distributed with
* GTK+ at ftp://ftp.gtk.org/pub/gtk/.
*/
#include "config.h"
#include <string.h>
#include "gtkframe.h"
#include "gtklabel.h"
#include "gtkprivate.h"
#include "gtkintl.h"
#include "gtkbuildable.h"
#include "gtksizerequest.h"
#define LABEL_PAD 1
#define LABEL_SIDE_PAD 2
enum {
PROP_0,
PROP_LABEL,
PROP_LABEL_XALIGN,
PROP_LABEL_YALIGN,
PROP_SHADOW,
PROP_SHADOW_TYPE,
PROP_LABEL_WIDGET
};
static void gtk_frame_set_property (GObject *object,
guint param_id,
const GValue *value,
GParamSpec *pspec);
static void gtk_frame_get_property (GObject *object,
guint param_id,
GValue *value,
GParamSpec *pspec);
static void gtk_frame_paint (GtkWidget *widget,
GdkRectangle *area);
static gint gtk_frame_expose (GtkWidget *widget,
GdkEventExpose *event);
static void gtk_frame_size_allocate (GtkWidget *widget,
GtkAllocation *allocation);
static void gtk_frame_remove (GtkContainer *container,
GtkWidget *child);
static void gtk_frame_forall (GtkContainer *container,
gboolean include_internals,
GtkCallback callback,
gpointer callback_data);
static void gtk_frame_compute_child_allocation (GtkFrame *frame,
GtkAllocation *child_allocation);
static void gtk_frame_real_compute_child_allocation (GtkFrame *frame,
GtkAllocation *child_allocation);
/* GtkBuildable */
static void gtk_frame_buildable_init (GtkBuildableIface *iface);
static void gtk_frame_buildable_add_child (GtkBuildable *buildable,
GtkBuilder *builder,
GObject *child,
const gchar *type);
static void gtk_frame_size_request_init (GtkSizeRequestIface *iface);
static void gtk_frame_get_width (GtkSizeRequest *widget,
gint *minimum_size,
gint *natural_size);
static void gtk_frame_get_height (GtkSizeRequest *widget,
gint *minimum_size,
gint *natural_size);
G_DEFINE_TYPE_WITH_CODE (GtkFrame, gtk_frame, GTK_TYPE_BIN,
G_IMPLEMENT_INTERFACE (GTK_TYPE_BUILDABLE,
gtk_frame_buildable_init)
G_IMPLEMENT_INTERFACE (GTK_TYPE_SIZE_REQUEST,
gtk_frame_size_request_init))
static void
gtk_frame_class_init (GtkFrameClass *class)
{
GObjectClass *gobject_class;
GtkWidgetClass *widget_class;
GtkContainerClass *container_class;
gobject_class = (GObjectClass*) class;
widget_class = GTK_WIDGET_CLASS (class);
container_class = GTK_CONTAINER_CLASS (class);
gobject_class->set_property = gtk_frame_set_property;
gobject_class->get_property = gtk_frame_get_property;
g_object_class_install_property (gobject_class,
PROP_LABEL,
g_param_spec_string ("label",
P_("Label"),
P_("Text of the frame's label"),
NULL,
GTK_PARAM_READABLE |
GTK_PARAM_WRITABLE));
g_object_class_install_property (gobject_class,
PROP_LABEL_XALIGN,
g_param_spec_float ("label-xalign",
P_("Label xalign"),
P_("The horizontal alignment of the label"),
0.0,
1.0,
0.0,
GTK_PARAM_READWRITE));
g_object_class_install_property (gobject_class,
PROP_LABEL_YALIGN,
g_param_spec_float ("label-yalign",
P_("Label yalign"),
P_("The vertical alignment of the label"),
0.0,
1.0,
0.5,
GTK_PARAM_READWRITE));
g_object_class_install_property (gobject_class,
PROP_SHADOW,
g_param_spec_enum ("shadow", NULL,
P_("Deprecated property, use shadow_type instead"),
GTK_TYPE_SHADOW_TYPE,
GTK_SHADOW_ETCHED_IN,
GTK_PARAM_READWRITE));
g_object_class_install_property (gobject_class,
PROP_SHADOW_TYPE,
g_param_spec_enum ("shadow-type",
P_("Frame shadow"),
P_("Appearance of the frame border"),
GTK_TYPE_SHADOW_TYPE,
GTK_SHADOW_ETCHED_IN,
GTK_PARAM_READWRITE));
g_object_class_install_property (gobject_class,
PROP_LABEL_WIDGET,
g_param_spec_object ("label-widget",
P_("Label widget"),
P_("A widget to display in place of the usual frame label"),
GTK_TYPE_WIDGET,
GTK_PARAM_READWRITE));
widget_class->expose_event = gtk_frame_expose;
widget_class->size_allocate = gtk_frame_size_allocate;
container_class->remove = gtk_frame_remove;
container_class->forall = gtk_frame_forall;
class->compute_child_allocation = gtk_frame_real_compute_child_allocation;
}
static void
gtk_frame_buildable_init (GtkBuildableIface *iface)
{
iface->add_child = gtk_frame_buildable_add_child;
}
static void
gtk_frame_buildable_add_child (GtkBuildable *buildable,
GtkBuilder *builder,
GObject *child,
const gchar *type)
{
if (type && strcmp (type, "label") == 0)
gtk_frame_set_label_widget (GTK_FRAME (buildable), GTK_WIDGET (child));
else if (!type)
gtk_container_add (GTK_CONTAINER (buildable), GTK_WIDGET (child));
else
GTK_BUILDER_WARN_INVALID_CHILD_TYPE (GTK_FRAME (buildable), type);
}
static void
gtk_frame_init (GtkFrame *frame)
{
frame->label_widget = NULL;
frame->shadow_type = GTK_SHADOW_ETCHED_IN;
frame->label_xalign = 0.0;
frame->label_yalign = 0.5;
}
static void
gtk_frame_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
GtkFrame *frame;
frame = GTK_FRAME (object);
switch (prop_id)
{
case PROP_LABEL:
gtk_frame_set_label (frame, g_value_get_string (value));
break;
case PROP_LABEL_XALIGN:
gtk_frame_set_label_align (frame, g_value_get_float (value),
frame->label_yalign);
break;
case PROP_LABEL_YALIGN:
gtk_frame_set_label_align (frame, frame->label_xalign,
g_value_get_float (value));
break;
case PROP_SHADOW:
case PROP_SHADOW_TYPE:
gtk_frame_set_shadow_type (frame, g_value_get_enum (value));
break;
case PROP_LABEL_WIDGET:
gtk_frame_set_label_widget (frame, g_value_get_object (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gtk_frame_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GtkFrame *frame;
frame = GTK_FRAME (object);
switch (prop_id)
{
case PROP_LABEL:
g_value_set_string (value, gtk_frame_get_label (frame));
break;
case PROP_LABEL_XALIGN:
g_value_set_float (value, frame->label_xalign);
break;
case PROP_LABEL_YALIGN:
g_value_set_float (value, frame->label_yalign);
break;
case PROP_SHADOW:
case PROP_SHADOW_TYPE:
g_value_set_enum (value, frame->shadow_type);
break;
case PROP_LABEL_WIDGET:
g_value_set_object (value,
frame->label_widget ?
G_OBJECT (frame->label_widget) : NULL);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
/**
* gtk_frame_new:
* @label: the text to use as the label of the frame
*
* Creates a new #GtkFrame, with optional label @label.
* If @label is %NULL, the label is omitted.
*
* Return value: a new #GtkFrame widget
**/
GtkWidget*
gtk_frame_new (const gchar *label)
{
return g_object_new (GTK_TYPE_FRAME, "label", label, NULL);
}
static void
gtk_frame_remove (GtkContainer *container,
GtkWidget *child)
{
GtkFrame *frame = GTK_FRAME (container);
if (frame->label_widget == child)
gtk_frame_set_label_widget (frame, NULL);
else
GTK_CONTAINER_CLASS (gtk_frame_parent_class)->remove (container, child);
}
static void
gtk_frame_forall (GtkContainer *container,
gboolean include_internals,
GtkCallback callback,
gpointer callback_data)
{
GtkBin *bin = GTK_BIN (container);
GtkFrame *frame = GTK_FRAME (container);
if (bin->child)
(* callback) (bin->child, callback_data);
if (frame->label_widget)
(* callback) (frame->label_widget, callback_data);
}
/**
* gtk_frame_set_label:
* @frame: a #GtkFrame
* @label: (allow-none): the text to use as the label of the frame
*
* Sets the text of the label. If @label is %NULL,
* the current label is removed.
**/
void
gtk_frame_set_label (GtkFrame *frame,
const gchar *label)
{
g_return_if_fail (GTK_IS_FRAME (frame));
if (!label)
{
gtk_frame_set_label_widget (frame, NULL);
}
else
{
GtkWidget *child = gtk_label_new (label);
gtk_widget_show (child);
gtk_frame_set_label_widget (frame, child);
}
}
/**
* gtk_frame_get_label:
* @frame: a #GtkFrame
*
* If the frame's label widget is a #GtkLabel, returns the
* text in the label widget. (The frame will have a #GtkLabel
* for the label widget if a non-%NULL argument was passed
* to gtk_frame_new().)
*
* Return value: the text in the label, or %NULL if there
* was no label widget or the lable widget was not
* a #GtkLabel. This string is owned by GTK+ and
* must not be modified or freed.
**/
G_CONST_RETURN gchar *
gtk_frame_get_label (GtkFrame *frame)
{
g_return_val_if_fail (GTK_IS_FRAME (frame), NULL);
if (GTK_IS_LABEL (frame->label_widget))
return gtk_label_get_text (GTK_LABEL (frame->label_widget));
else
return NULL;
}
/**
* gtk_frame_set_label_widget:
* @frame: a #GtkFrame
* @label_widget: the new label widget
*
* Sets the label widget for the frame. This is the widget that
* will appear embedded in the top edge of the frame as a
* title.
**/
void
gtk_frame_set_label_widget (GtkFrame *frame,
GtkWidget *label_widget)
{
gboolean need_resize = FALSE;
g_return_if_fail (GTK_IS_FRAME (frame));
g_return_if_fail (label_widget == NULL || GTK_IS_WIDGET (label_widget));
g_return_if_fail (label_widget == NULL || label_widget->parent == NULL);
if (frame->label_widget == label_widget)
return;
if (frame->label_widget)
{
need_resize = gtk_widget_get_visible (frame->label_widget);
gtk_widget_unparent (frame->label_widget);
}
frame->label_widget = label_widget;
if (label_widget)
{
frame->label_widget = label_widget;
gtk_widget_set_parent (label_widget, GTK_WIDGET (frame));
need_resize |= gtk_widget_get_visible (label_widget);
}
if (gtk_widget_get_visible (GTK_WIDGET (frame)) && need_resize)
gtk_widget_queue_resize (GTK_WIDGET (frame));
g_object_freeze_notify (G_OBJECT (frame));
g_object_notify (G_OBJECT (frame), "label-widget");
g_object_notify (G_OBJECT (frame), "label");
g_object_thaw_notify (G_OBJECT (frame));
}
/**
* gtk_frame_get_label_widget:
* @frame: a #GtkFrame
*
* Retrieves the label widget for the frame. See
* gtk_frame_set_label_widget().
*
* Return value: the label widget, or %NULL if there is none.
**/
GtkWidget *
gtk_frame_get_label_widget (GtkFrame *frame)
{
g_return_val_if_fail (GTK_IS_FRAME (frame), NULL);
return frame->label_widget;
}
/**
* gtk_frame_set_label_align:
* @frame: a #GtkFrame
* @xalign: The position of the label along the top edge
* of the widget. A value of 0.0 represents left alignment;
* 1.0 represents right alignment.
* @yalign: The y alignment of the label. A value of 0.0 aligns under
* the frame; 1.0 aligns above the frame. If the values are exactly
* 0.0 or 1.0 the gap in the frame won't be painted because the label
* will be completely above or below the frame.
*
* Sets the alignment of the frame widget's label. The
* default values for a newly created frame are 0.0 and 0.5.
**/
void
gtk_frame_set_label_align (GtkFrame *frame,
gfloat xalign,
gfloat yalign)
{
g_return_if_fail (GTK_IS_FRAME (frame));
xalign = CLAMP (xalign, 0.0, 1.0);
yalign = CLAMP (yalign, 0.0, 1.0);
g_object_freeze_notify (G_OBJECT (frame));
if (xalign != frame->label_xalign)
{
frame->label_xalign = xalign;
g_object_notify (G_OBJECT (frame), "label-xalign");
}
if (yalign != frame->label_yalign)
{
frame->label_yalign = yalign;
g_object_notify (G_OBJECT (frame), "label-yalign");
}
g_object_thaw_notify (G_OBJECT (frame));
gtk_widget_queue_resize (GTK_WIDGET (frame));
}
/**
* gtk_frame_get_label_align:
* @frame: a #GtkFrame
* @xalign: (allow-none): location to store X alignment of frame's label, or %NULL
* @yalign: (allow-none): location to store X alignment of frame's label, or %NULL
*
* Retrieves the X and Y alignment of the frame's label. See
* gtk_frame_set_label_align().
**/
void
gtk_frame_get_label_align (GtkFrame *frame,
gfloat *xalign,
gfloat *yalign)
{
g_return_if_fail (GTK_IS_FRAME (frame));
if (xalign)
*xalign = frame->label_xalign;
if (yalign)
*yalign = frame->label_yalign;
}
/**
* gtk_frame_set_shadow_type:
* @frame: a #GtkFrame
* @type: the new #GtkShadowType
*
* Sets the shadow type for @frame.
**/
void
gtk_frame_set_shadow_type (GtkFrame *frame,
GtkShadowType type)
{
GtkWidget *widget;
g_return_if_fail (GTK_IS_FRAME (frame));
if ((GtkShadowType) frame->shadow_type != type)
{
widget = GTK_WIDGET (frame);
frame->shadow_type = type;
g_object_notify (G_OBJECT (frame), "shadow-type");
if (gtk_widget_is_drawable (widget))
{
gtk_widget_queue_draw (widget);
}
gtk_widget_queue_resize (widget);
}
}
/**
* gtk_frame_get_shadow_type:
* @frame: a #GtkFrame
*
* Retrieves the shadow type of the frame. See
* gtk_frame_set_shadow_type().
*
* Return value: the current shadow type of the frame.
**/
GtkShadowType
gtk_frame_get_shadow_type (GtkFrame *frame)
{
g_return_val_if_fail (GTK_IS_FRAME (frame), GTK_SHADOW_ETCHED_IN);
return frame->shadow_type;
}
static void
gtk_frame_paint (GtkWidget *widget,
GdkRectangle *area)
{
GtkFrame *frame;
gint x, y, width, height;
if (gtk_widget_is_drawable (widget))
{
frame = GTK_FRAME (widget);
x = frame->child_allocation.x - widget->style->xthickness;
y = frame->child_allocation.y - widget->style->ythickness;
width = frame->child_allocation.width + 2 * widget->style->xthickness;
height = frame->child_allocation.height + 2 * widget->style->ythickness;
if (frame->label_widget)
{
GtkRequisition child_requisition;
gfloat xalign;
gint height_extra;
gint x2;
gtk_widget_get_child_requisition (frame->label_widget, &child_requisition);
if (gtk_widget_get_direction (widget) == GTK_TEXT_DIR_LTR)
xalign = frame->label_xalign;
else
xalign = 1 - frame->label_xalign;
height_extra = MAX (0, child_requisition.height - widget->style->ythickness)
- frame->label_yalign * child_requisition.height;
y -= height_extra;
height += height_extra;
x2 = widget->style->xthickness + (frame->child_allocation.width - child_requisition.width - 2 * LABEL_PAD - 2 * LABEL_SIDE_PAD) * xalign + LABEL_SIDE_PAD;
/* If the label is completely over or under the frame we can omit the gap */
if (frame->label_yalign == 0.0 || frame->label_yalign == 1.0)
gtk_paint_shadow (widget->style, widget->window,
widget->state, frame->shadow_type,
area, widget, "frame",
x, y, width, height);
else
gtk_paint_shadow_gap (widget->style, widget->window,
widget->state, frame->shadow_type,
area, widget, "frame",
x, y, width, height,
GTK_POS_TOP,
x2, child_requisition.width + 2 * LABEL_PAD);
}
else
gtk_paint_shadow (widget->style, widget->window,
widget->state, frame->shadow_type,
area, widget, "frame",
x, y, width, height);
}
}
static gboolean
gtk_frame_expose (GtkWidget *widget,
GdkEventExpose *event)
{
if (gtk_widget_is_drawable (widget))
{
gtk_frame_paint (widget, &event->area);
GTK_WIDGET_CLASS (gtk_frame_parent_class)->expose_event (widget, event);
}
return FALSE;
}
static void
gtk_frame_size_allocate (GtkWidget *widget,
GtkAllocation *allocation)
{
GtkFrame *frame = GTK_FRAME (widget);
GtkBin *bin = GTK_BIN (widget);
GtkAllocation new_allocation;
widget->allocation = *allocation;
gtk_frame_compute_child_allocation (frame, &new_allocation);
/* If the child allocation changed, that means that the frame is drawn
* in a new place, so we must redraw the entire widget.
*/
if (gtk_widget_get_mapped (widget)
#if 0
&&
(new_allocation.x != frame->child_allocation.x ||
new_allocation.y != frame->child_allocation.y ||
new_allocation.width != frame->child_allocation.width ||
new_allocation.height != frame->child_allocation.height)
#endif
)
gdk_window_invalidate_rect (widget->window, &widget->allocation, FALSE);
if (bin->child && gtk_widget_get_visible (bin->child))
gtk_widget_size_allocate (bin->child, &new_allocation);
frame->child_allocation = new_allocation;
if (frame->label_widget && gtk_widget_get_visible (frame->label_widget))
{
GtkRequisition child_requisition;
GtkAllocation child_allocation;
gfloat xalign;
gtk_widget_get_child_requisition (frame->label_widget, &child_requisition);
if (gtk_widget_get_direction (widget) == GTK_TEXT_DIR_LTR)
xalign = frame->label_xalign;
else
xalign = 1 - frame->label_xalign;
child_allocation.x = frame->child_allocation.x + LABEL_SIDE_PAD +
(frame->child_allocation.width - child_requisition.width - 2 * LABEL_PAD - 2 * LABEL_SIDE_PAD) * xalign + LABEL_PAD;
child_allocation.width = MIN (child_requisition.width, new_allocation.width - 2 * LABEL_PAD - 2 * LABEL_SIDE_PAD);
child_allocation.y = frame->child_allocation.y - MAX (child_requisition.height, widget->style->ythickness);
child_allocation.height = child_requisition.height;
gtk_widget_size_allocate (frame->label_widget, &child_allocation);
}
}
static void
gtk_frame_compute_child_allocation (GtkFrame *frame,
GtkAllocation *child_allocation)
{
g_return_if_fail (GTK_IS_FRAME (frame));
g_return_if_fail (child_allocation != NULL);
GTK_FRAME_GET_CLASS (frame)->compute_child_allocation (frame, child_allocation);
}
static void
gtk_frame_real_compute_child_allocation (GtkFrame *frame,
GtkAllocation *child_allocation)
{
GtkWidget *widget = GTK_WIDGET (frame);
GtkAllocation *allocation = &widget->allocation;
GtkRequisition child_requisition;
gint top_margin;
if (frame->label_widget)
{
gtk_widget_get_child_requisition (frame->label_widget, &child_requisition);
top_margin = MAX (child_requisition.height, widget->style->ythickness);
}
else
top_margin = widget->style->ythickness;
child_allocation->x = (GTK_CONTAINER (frame)->border_width +
widget->style->xthickness);
child_allocation->width = MAX(1, (gint)allocation->width - child_allocation->x * 2);
child_allocation->y = (GTK_CONTAINER (frame)->border_width + top_margin);
child_allocation->height = MAX (1, ((gint)allocation->height - child_allocation->y -
(gint)GTK_CONTAINER (frame)->border_width -
(gint)widget->style->ythickness));
child_allocation->x += allocation->x;
child_allocation->y += allocation->y;
}
static void
gtk_frame_get_size (GtkSizeRequest *request,
GtkOrientation orientation,
gint *minimum_size,
gint *natural_size)
{
GtkWidget *widget = GTK_WIDGET (request);
GtkFrame *frame = GTK_FRAME (widget);
GtkBin *bin = GTK_BIN (widget);
gint child_min, child_nat;
gint minimum, natural;
if (frame->label_widget && gtk_widget_get_visible (frame->label_widget))
{
if (orientation == GTK_ORIENTATION_HORIZONTAL)
{
gtk_size_request_get_width (GTK_SIZE_REQUEST (frame->label_widget),
&child_min, &child_nat);
minimum = child_min + 2 * LABEL_PAD + 2 * LABEL_SIDE_PAD;
natural = child_nat + 2 * LABEL_PAD + 2 * LABEL_SIDE_PAD;
}
else
{
gtk_size_request_get_height (GTK_SIZE_REQUEST (frame->label_widget),
&child_min, &child_nat);
minimum = MAX (0, child_min - widget->style->ythickness);
natural = MAX (0, child_nat - widget->style->ythickness);
}
}
else
{
minimum = 0;
natural = 0;
}
if (bin->child && gtk_widget_get_visible (bin->child))
{
if (orientation == GTK_ORIENTATION_HORIZONTAL)
{
gtk_size_request_get_width (GTK_SIZE_REQUEST (bin->child),
&child_min, &child_nat);
minimum = MAX (minimum, child_min);
natural = MAX (natural, child_nat);
}
else
{
gtk_size_request_get_height (GTK_SIZE_REQUEST (bin->child),
&child_min, &child_nat);
minimum += child_min;
natural += child_nat;
}
}
if (orientation == GTK_ORIENTATION_HORIZONTAL)
{
minimum += (GTK_CONTAINER (widget)->border_width +
GTK_WIDGET (widget)->style->xthickness) * 2;
natural += (GTK_CONTAINER (widget)->border_width +
GTK_WIDGET (widget)->style->xthickness) * 2;
}
else
{
minimum += (GTK_CONTAINER (widget)->border_width +
GTK_WIDGET (widget)->style->ythickness) * 2;
natural += (GTK_CONTAINER (widget)->border_width +
GTK_WIDGET (widget)->style->ythickness) * 2;
}
if (minimum_size)
*minimum_size = minimum;
if (natural_size)
*natural_size = natural;
}
static void
gtk_frame_get_width (GtkSizeRequest *widget,
gint *minimum_size,
gint *natural_size)
{
gtk_frame_get_size (widget, GTK_ORIENTATION_HORIZONTAL, minimum_size, natural_size);
}
static void
gtk_frame_get_height (GtkSizeRequest *widget,
gint *minimum_size,
gint *natural_size)
{
gtk_frame_get_size (widget, GTK_ORIENTATION_VERTICAL, minimum_size, natural_size);
}
static void
gtk_frame_size_request_init (GtkSizeRequestIface *iface)
{
iface->get_width = gtk_frame_get_width;
iface->get_height = gtk_frame_get_height;
}
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