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gtk/gtk/gtkhandlebox.c
Matthias Clasen beb8c290d1 Always chain up in ::style-updated 
This was not handled consistently, but the default handler
does useful things, so we should always chain up.
2011-02-07 07:30:37 -05:00

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/* GTK - The GIMP Toolkit
* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
* Copyright (C) 1998 Elliot Lee
*
* 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 <stdlib.h>
#include "gtkhandlebox.h"
#include "gtkinvisible.h"
#include "gtkmain.h"
#include "gtkmarshalers.h"
#include "gtkwindow.h"
#include "gtktypebuiltins.h"
#include "gtkprivate.h"
#include "gtkintl.h"
struct _GtkHandleBoxPrivate
{
/* Properties */
GtkPositionType handle_position;
GtkPositionType snap_edge;
GtkShadowType shadow_type;
gboolean child_detached;
/* Properties */
GtkAllocation attach_allocation;
GtkAllocation float_allocation;
GdkDevice *grab_device;
GdkWindow *bin_window; /* parent window for children */
GdkWindow *float_window;
/* Variables used during a drag
*/
gint orig_x;
gint orig_y;
guint float_window_mapped : 1;
guint in_drag : 1;
guint shrink_on_detach : 1;
};
enum {
PROP_0,
PROP_SHADOW_TYPE,
PROP_HANDLE_POSITION,
PROP_SNAP_EDGE,
PROP_SNAP_EDGE_SET,
PROP_CHILD_DETACHED
};
#define DRAG_HANDLE_SIZE 10
#define CHILDLESS_SIZE 25
#define GHOST_HEIGHT 3
#define TOLERANCE 5
enum {
SIGNAL_CHILD_ATTACHED,
SIGNAL_CHILD_DETACHED,
SIGNAL_LAST
};
/* The algorithm for docking and redocking implemented here
* has a couple of nice properties:
*
* 1) During a single drag, docking always occurs at the
* the same cursor position. This means that the users
* motions are reversible, and that you won't
* undock/dock oscillations.
*
* 2) Docking generally occurs at user-visible features.
* The user, once they figure out to redock, will
* have useful information about doing it again in
* the future.
*
* Please try to preserve these properties if you
* change the algorithm. (And the current algorithm
* is far from ideal). Briefly, the current algorithm
* for deciding whether the handlebox is docked or not:
*
* 1) The decision is done by comparing two rectangles - the
* allocation if the widget at the start of the drag,
* and the boundary of hb->bin_window at the start of
* of the drag offset by the distance that the cursor
* has moved.
*
* 2) These rectangles must have one edge, the "snap_edge"
* of the handlebox, aligned within TOLERANCE.
*
* 3) On the other dimension, the extents of one rectangle
* must be contained in the extents of the other,
* extended by tolerance. That is, either we can have:
*
* <-TOLERANCE-|--------bin_window--------------|-TOLERANCE->
* <--------float_window-------------------->
*
* or we can have:
*
* <-TOLERANCE-|------float_window--------------|-TOLERANCE->
* <--------bin_window-------------------->
*/
static void gtk_handle_box_set_property (GObject *object,
guint param_id,
const GValue *value,
GParamSpec *pspec);
static void gtk_handle_box_get_property (GObject *object,
guint param_id,
GValue *value,
GParamSpec *pspec);
static void gtk_handle_box_map (GtkWidget *widget);
static void gtk_handle_box_unmap (GtkWidget *widget);
static void gtk_handle_box_realize (GtkWidget *widget);
static void gtk_handle_box_unrealize (GtkWidget *widget);
static void gtk_handle_box_style_updated (GtkWidget *widget);
static void gtk_handle_box_size_request (GtkWidget *widget,
GtkRequisition *requisition);
static void gtk_handle_box_get_preferred_width (GtkWidget *widget,
gint *minimum,
gint *natural);
static void gtk_handle_box_get_preferred_height (GtkWidget *widget,
gint *minimum,
gint *natural);
static void gtk_handle_box_size_allocate (GtkWidget *widget,
GtkAllocation *real_allocation);
static void gtk_handle_box_add (GtkContainer *container,
GtkWidget *widget);
static void gtk_handle_box_remove (GtkContainer *container,
GtkWidget *widget);
static gboolean gtk_handle_box_draw (GtkWidget *widget,
cairo_t *cr);
static gboolean gtk_handle_box_button_press (GtkWidget *widget,
GdkEventButton *event);
static gboolean gtk_handle_box_motion (GtkWidget *widget,
GdkEventMotion *event);
static gboolean gtk_handle_box_delete_event (GtkWidget *widget,
GdkEventAny *event);
static void gtk_handle_box_reattach (GtkHandleBox *hb);
static void gtk_handle_box_end_drag (GtkHandleBox *hb,
guint32 time);
static guint handle_box_signals[SIGNAL_LAST] = { 0 };
G_DEFINE_TYPE (GtkHandleBox, gtk_handle_box, GTK_TYPE_BIN)
static void
gtk_handle_box_class_init (GtkHandleBoxClass *class)
{
GObjectClass *gobject_class;
GtkWidgetClass *widget_class;
GtkContainerClass *container_class;
gobject_class = (GObjectClass *) class;
widget_class = (GtkWidgetClass *) class;
container_class = (GtkContainerClass *) class;
gobject_class->set_property = gtk_handle_box_set_property;
gobject_class->get_property = gtk_handle_box_get_property;
g_object_class_install_property (gobject_class,
PROP_SHADOW_TYPE,
g_param_spec_enum ("shadow-type",
P_("Shadow type"),
P_("Appearance of the shadow that surrounds the container"),
GTK_TYPE_SHADOW_TYPE,
GTK_SHADOW_OUT,
GTK_PARAM_READWRITE));
g_object_class_install_property (gobject_class,
PROP_HANDLE_POSITION,
g_param_spec_enum ("handle-position",
P_("Handle position"),
P_("Position of the handle relative to the child widget"),
GTK_TYPE_POSITION_TYPE,
GTK_POS_LEFT,
GTK_PARAM_READWRITE));
g_object_class_install_property (gobject_class,
PROP_SNAP_EDGE,
g_param_spec_enum ("snap-edge",
P_("Snap edge"),
P_("Side of the handlebox that's lined up with the docking point to dock the handlebox"),
GTK_TYPE_POSITION_TYPE,
GTK_POS_TOP,
GTK_PARAM_READWRITE));
g_object_class_install_property (gobject_class,
PROP_SNAP_EDGE_SET,
g_param_spec_boolean ("snap-edge-set",
P_("Snap edge set"),
P_("Whether to use the value from the snap_edge property or a value derived from handle_position"),
FALSE,
GTK_PARAM_READWRITE));
g_object_class_install_property (gobject_class,
PROP_CHILD_DETACHED,
g_param_spec_boolean ("child-detached",
P_("Child Detached"),
P_("A boolean value indicating whether the handlebox's child is attached or detached."),
FALSE,
GTK_PARAM_READABLE));
widget_class->map = gtk_handle_box_map;
widget_class->unmap = gtk_handle_box_unmap;
widget_class->realize = gtk_handle_box_realize;
widget_class->unrealize = gtk_handle_box_unrealize;
widget_class->style_updated = gtk_handle_box_style_updated;
widget_class->get_preferred_width = gtk_handle_box_get_preferred_width;
widget_class->get_preferred_height = gtk_handle_box_get_preferred_height;
widget_class->size_allocate = gtk_handle_box_size_allocate;
widget_class->draw = gtk_handle_box_draw;
widget_class->button_press_event = gtk_handle_box_button_press;
widget_class->delete_event = gtk_handle_box_delete_event;
container_class->add = gtk_handle_box_add;
container_class->remove = gtk_handle_box_remove;
class->child_attached = NULL;
class->child_detached = NULL;
handle_box_signals[SIGNAL_CHILD_ATTACHED] =
g_signal_new (I_("child-attached"),
G_OBJECT_CLASS_TYPE (gobject_class),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GtkHandleBoxClass, child_attached),
NULL, NULL,
_gtk_marshal_VOID__OBJECT,
G_TYPE_NONE, 1,
GTK_TYPE_WIDGET);
handle_box_signals[SIGNAL_CHILD_DETACHED] =
g_signal_new (I_("child-detached"),
G_OBJECT_CLASS_TYPE (gobject_class),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GtkHandleBoxClass, child_detached),
NULL, NULL,
_gtk_marshal_VOID__OBJECT,
G_TYPE_NONE, 1,
GTK_TYPE_WIDGET);
g_type_class_add_private (gobject_class, sizeof (GtkHandleBoxPrivate));
}
static void
gtk_handle_box_init (GtkHandleBox *handle_box)
{
GtkHandleBoxPrivate *priv;
GtkStyleContext *context;
handle_box->priv = G_TYPE_INSTANCE_GET_PRIVATE (handle_box,
GTK_TYPE_HANDLE_BOX,
GtkHandleBoxPrivate);
priv = handle_box->priv;
gtk_widget_set_has_window (GTK_WIDGET (handle_box), TRUE);
priv->bin_window = NULL;
priv->float_window = NULL;
priv->shadow_type = GTK_SHADOW_OUT;
priv->handle_position = GTK_POS_LEFT;
priv->float_window_mapped = FALSE;
priv->child_detached = FALSE;
priv->in_drag = FALSE;
priv->shrink_on_detach = TRUE;
priv->snap_edge = -1;
context = gtk_widget_get_style_context (GTK_WIDGET (handle_box));
gtk_style_context_add_class (context, GTK_STYLE_CLASS_DOCK);
}
static void
gtk_handle_box_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
GtkHandleBox *handle_box = GTK_HANDLE_BOX (object);
switch (prop_id)
{
case PROP_SHADOW_TYPE:
gtk_handle_box_set_shadow_type (handle_box, g_value_get_enum (value));
break;
case PROP_HANDLE_POSITION:
gtk_handle_box_set_handle_position (handle_box, g_value_get_enum (value));
break;
case PROP_SNAP_EDGE:
gtk_handle_box_set_snap_edge (handle_box, g_value_get_enum (value));
break;
case PROP_SNAP_EDGE_SET:
if (!g_value_get_boolean (value))
gtk_handle_box_set_snap_edge (handle_box, (GtkPositionType)-1);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gtk_handle_box_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GtkHandleBox *handle_box = GTK_HANDLE_BOX (object);
GtkHandleBoxPrivate *priv = handle_box->priv;
switch (prop_id)
{
case PROP_SHADOW_TYPE:
g_value_set_enum (value, priv->shadow_type);
break;
case PROP_HANDLE_POSITION:
g_value_set_enum (value, priv->handle_position);
break;
case PROP_SNAP_EDGE:
g_value_set_enum (value,
(priv->snap_edge == -1 ?
GTK_POS_TOP : priv->snap_edge));
break;
case PROP_SNAP_EDGE_SET:
g_value_set_boolean (value, priv->snap_edge != -1);
break;
case PROP_CHILD_DETACHED:
g_value_set_boolean (value, priv->child_detached);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
GtkWidget*
gtk_handle_box_new (void)
{
return g_object_new (GTK_TYPE_HANDLE_BOX, NULL);
}
static void
gtk_handle_box_map (GtkWidget *widget)
{
GtkHandleBox *hb = GTK_HANDLE_BOX (widget);
GtkHandleBoxPrivate *priv = hb->priv;
GtkBin *bin = GTK_BIN (widget);
GtkWidget *child;
gtk_widget_set_mapped (widget, TRUE);
child = gtk_bin_get_child (bin);
if (child != NULL &&
gtk_widget_get_visible (child) &&
!gtk_widget_get_mapped (child))
gtk_widget_map (child);
if (priv->child_detached && !priv->float_window_mapped)
{
gdk_window_show (priv->float_window);
priv->float_window_mapped = TRUE;
}
gdk_window_show (priv->bin_window);
gdk_window_show (gtk_widget_get_window (widget));
}
static void
gtk_handle_box_unmap (GtkWidget *widget)
{
GtkHandleBox *hb = GTK_HANDLE_BOX (widget);
GtkHandleBoxPrivate *priv = hb->priv;
gtk_widget_set_mapped (widget, FALSE);
gdk_window_hide (gtk_widget_get_window (widget));
if (priv->float_window_mapped)
{
gdk_window_hide (priv->float_window);
priv->float_window_mapped = FALSE;
}
GTK_WIDGET_CLASS (gtk_handle_box_parent_class)->unmap (widget);
}
static void
gtk_handle_box_realize (GtkWidget *widget)
{
GtkHandleBox *hb = GTK_HANDLE_BOX (widget);
GtkHandleBoxPrivate *priv = hb->priv;
GtkAllocation allocation;
GtkRequisition requisition;
GtkStyleContext *context;
GtkWidget *child;
GdkWindow *window;
GdkWindowAttr attributes;
gint attributes_mask;
gtk_widget_set_realized (widget, TRUE);
gtk_widget_get_allocation (widget, &allocation);
attributes.x = allocation.x;
attributes.y = allocation.y;
attributes.width = allocation.width;
attributes.height = allocation.height;
attributes.window_type = GDK_WINDOW_CHILD;
attributes.wclass = GDK_INPUT_OUTPUT;
attributes.visual = gtk_widget_get_visual (widget);
attributes.event_mask = (gtk_widget_get_events (widget)
| GDK_EXPOSURE_MASK);
attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL;
window = gdk_window_new (gtk_widget_get_parent_window (widget),
&attributes, attributes_mask);
gtk_widget_set_window (widget, window);
gdk_window_set_user_data (window, widget);
attributes.x = 0;
attributes.y = 0;
attributes.width = allocation.width;
attributes.height = allocation.height;
attributes.window_type = GDK_WINDOW_CHILD;
attributes.event_mask = (gtk_widget_get_events (widget)
| GDK_EXPOSURE_MASK
| GDK_BUTTON1_MOTION_MASK
| GDK_POINTER_MOTION_HINT_MASK
| GDK_BUTTON_PRESS_MASK
| GDK_BUTTON_RELEASE_MASK);
attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL;
priv->bin_window = gdk_window_new (window,
&attributes, attributes_mask);
gdk_window_set_user_data (priv->bin_window, widget);
child = gtk_bin_get_child (GTK_BIN (hb));
if (child)
gtk_widget_set_parent_window (child, priv->bin_window);
gtk_widget_get_preferred_size (widget, &requisition, NULL);
attributes.x = 0;
attributes.y = 0;
attributes.width = requisition.width;
attributes.height = requisition.height;
attributes.window_type = GDK_WINDOW_TOPLEVEL;
attributes.wclass = GDK_INPUT_OUTPUT;
attributes.visual = gtk_widget_get_visual (widget);
attributes.event_mask = (gtk_widget_get_events (widget)
| GDK_KEY_PRESS_MASK
| GDK_ENTER_NOTIFY_MASK
| GDK_LEAVE_NOTIFY_MASK
| GDK_FOCUS_CHANGE_MASK
| GDK_STRUCTURE_MASK);
attributes.type_hint = GDK_WINDOW_TYPE_HINT_TOOLBAR;
attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_TYPE_HINT;
priv->float_window = gdk_window_new (gtk_widget_get_root_window (widget),
&attributes, attributes_mask);
gdk_window_set_user_data (priv->float_window, widget);
gdk_window_set_decorations (priv->float_window, 0);
gdk_window_set_type_hint (priv->float_window, GDK_WINDOW_TYPE_HINT_TOOLBAR);
context = gtk_widget_get_style_context (widget);
gtk_style_context_set_background (context, window);
gtk_style_context_set_background (context, priv->bin_window);
gtk_style_context_set_background (context, priv->float_window);
}
static void
gtk_handle_box_unrealize (GtkWidget *widget)
{
GtkHandleBox *hb = GTK_HANDLE_BOX (widget);
GtkHandleBoxPrivate *priv = hb->priv;
gdk_window_set_user_data (priv->bin_window, NULL);
gdk_window_destroy (priv->bin_window);
priv->bin_window = NULL;
gdk_window_set_user_data (priv->float_window, NULL);
gdk_window_destroy (priv->float_window);
priv->float_window = NULL;
GTK_WIDGET_CLASS (gtk_handle_box_parent_class)->unrealize (widget);
}
static void
gtk_handle_box_style_updated (GtkWidget *widget)
{
GtkHandleBox *hb = GTK_HANDLE_BOX (widget);
GtkHandleBoxPrivate *priv = hb->priv;
GTK_WIDGET_CLASS (gtk_handle_box_parent_class)->style_updated (widget);
if (gtk_widget_get_realized (widget) &&
gtk_widget_get_has_window (widget))
{
GtkStateFlags state;
GtkStyleContext *context;
context = gtk_widget_get_style_context (widget);
state = gtk_widget_get_state_flags (widget);
gtk_style_context_save (context);
gtk_style_context_set_state (context, state);
gtk_style_context_set_background (context, gtk_widget_get_window (widget));
gtk_style_context_set_background (context, priv->bin_window);
gtk_style_context_set_background (context, priv->float_window);
gtk_style_context_restore (context);
}
}
static int
effective_handle_position (GtkHandleBox *hb)
{
GtkHandleBoxPrivate *priv = hb->priv;
int handle_position;
if (gtk_widget_get_direction (GTK_WIDGET (hb)) == GTK_TEXT_DIR_LTR)
handle_position = priv->handle_position;
else
{
switch (priv->handle_position)
{
case GTK_POS_LEFT:
handle_position = GTK_POS_RIGHT;
break;
case GTK_POS_RIGHT:
handle_position = GTK_POS_LEFT;
break;
default:
handle_position = priv->handle_position;
break;
}
}
return handle_position;
}
static void
gtk_handle_box_size_request (GtkWidget *widget,
GtkRequisition *requisition)
{
GtkBin *bin = GTK_BIN (widget);
GtkHandleBox *hb = GTK_HANDLE_BOX (widget);
GtkHandleBoxPrivate *priv = hb->priv;
GtkRequisition child_requisition;
GtkWidget *child;
gint handle_position;
handle_position = effective_handle_position (hb);
if (handle_position == GTK_POS_LEFT ||
handle_position == GTK_POS_RIGHT)
{
requisition->width = DRAG_HANDLE_SIZE;
requisition->height = 0;
}
else
{
requisition->width = 0;
requisition->height = DRAG_HANDLE_SIZE;
}
child = gtk_bin_get_child (bin);
/* if our child is not visible, we still request its size, since we
* won't have any useful hint for our size otherwise.
*/
if (child)
{
gtk_widget_get_preferred_size (child, &child_requisition, NULL);
}
else
{
child_requisition.width = 0;
child_requisition.height = 0;
}
if (priv->child_detached)
{
/* FIXME: This doesn't work currently */
if (!priv->shrink_on_detach)
{
if (handle_position == GTK_POS_LEFT ||
handle_position == GTK_POS_RIGHT)
requisition->height += child_requisition.height;
else
requisition->width += child_requisition.width;
}
else
{
GtkStyleContext *context;
GtkStateFlags state;
GtkBorder padding;
context = gtk_widget_get_style_context (widget);
state = gtk_widget_get_state_flags (widget);
gtk_style_context_get_padding (context, state, &padding);
if (handle_position == GTK_POS_LEFT ||
handle_position == GTK_POS_RIGHT)
requisition->height += padding.top;
else
requisition->width += padding.left;
}
}
else
{
guint border_width;
border_width = gtk_container_get_border_width (GTK_CONTAINER (widget));
requisition->width += border_width * 2;
requisition->height += border_width * 2;
if (child)
{
requisition->width += child_requisition.width;
requisition->height += child_requisition.height;
}
else
{
requisition->width += CHILDLESS_SIZE;
requisition->height += CHILDLESS_SIZE;
}
}
}
static void
gtk_handle_box_get_preferred_width (GtkWidget *widget,
gint *minimum,
gint *natural)
{
GtkRequisition requisition;
gtk_handle_box_size_request (widget, &requisition);
*minimum = *natural = requisition.width;
}
static void
gtk_handle_box_get_preferred_height (GtkWidget *widget,
gint *minimum,
gint *natural)
{
GtkRequisition requisition;
gtk_handle_box_size_request (widget, &requisition);
*minimum = *natural = requisition.height;
}
static void
gtk_handle_box_size_allocate (GtkWidget *widget,
GtkAllocation *allocation)
{
GtkBin *bin = GTK_BIN (widget);
GtkHandleBox *hb = GTK_HANDLE_BOX (widget);
GtkHandleBoxPrivate *priv = hb->priv;
GtkRequisition child_requisition;
GtkWidget *child;
gint handle_position;
handle_position = effective_handle_position (hb);
child = gtk_bin_get_child (bin);
if (child)
{
gtk_widget_get_preferred_size (child, &child_requisition, NULL);
}
else
{
child_requisition.width = 0;
child_requisition.height = 0;
}
gtk_widget_set_allocation (widget, allocation);
if (gtk_widget_get_realized (widget))
gdk_window_move_resize (gtk_widget_get_window (widget),
allocation->x, allocation->y,
allocation->width, allocation->height);
if (child != NULL && gtk_widget_get_visible (child))
{
GtkAllocation child_allocation;
guint border_width;
border_width = gtk_container_get_border_width (GTK_CONTAINER (widget));
child_allocation.x = border_width;
child_allocation.y = border_width;
if (handle_position == GTK_POS_LEFT)
child_allocation.x += DRAG_HANDLE_SIZE;
else if (handle_position == GTK_POS_TOP)
child_allocation.y += DRAG_HANDLE_SIZE;
if (priv->child_detached)
{
guint float_width;
guint float_height;
child_allocation.width = child_requisition.width;
child_allocation.height = child_requisition.height;
float_width = child_allocation.width + 2 * border_width;
float_height = child_allocation.height + 2 * border_width;
if (handle_position == GTK_POS_LEFT ||
handle_position == GTK_POS_RIGHT)
float_width += DRAG_HANDLE_SIZE;
else
float_height += DRAG_HANDLE_SIZE;
if (gtk_widget_get_realized (widget))
{
gdk_window_resize (priv->float_window,
float_width,
float_height);
gdk_window_move_resize (priv->bin_window,
0,
0,
float_width,
float_height);
}
}
else
{
child_allocation.width = MAX (1, (gint) allocation->width - 2 * border_width);
child_allocation.height = MAX (1, (gint) allocation->height - 2 * border_width);
if (handle_position == GTK_POS_LEFT ||
handle_position == GTK_POS_RIGHT)
child_allocation.width -= DRAG_HANDLE_SIZE;
else
child_allocation.height -= DRAG_HANDLE_SIZE;
if (gtk_widget_get_realized (widget))
gdk_window_move_resize (priv->bin_window,
0,
0,
allocation->width,
allocation->height);
}
gtk_widget_size_allocate (child, &child_allocation);
}
}
static void
gtk_handle_box_draw_ghost (GtkHandleBox *hb,
cairo_t *cr)
{
GtkWidget *widget = GTK_WIDGET (hb);
GtkStateFlags state;
GtkStyleContext *context;
guint x;
guint y;
guint width;
guint height;
gint allocation_width;
gint allocation_height;
gint handle_position;
handle_position = effective_handle_position (hb);
allocation_width = gtk_widget_get_allocated_width (widget);
allocation_height = gtk_widget_get_allocated_height (widget);
if (handle_position == GTK_POS_LEFT ||
handle_position == GTK_POS_RIGHT)
{
x = handle_position == GTK_POS_LEFT ? 0 : allocation_width - DRAG_HANDLE_SIZE;
y = 0;
width = DRAG_HANDLE_SIZE;
height = allocation_height;
}
else
{
x = 0;
y = handle_position == GTK_POS_TOP ? 0 : allocation_height - DRAG_HANDLE_SIZE;
width = allocation_width;
height = DRAG_HANDLE_SIZE;
}
context = gtk_widget_get_style_context (widget);
state = gtk_widget_get_state_flags (widget);
gtk_style_context_save (context);
gtk_style_context_set_state (context, state);
gtk_render_background (context, cr, x, y, width, height);
gtk_render_frame (context, cr, x, y, width, height);
if (handle_position == GTK_POS_LEFT ||
handle_position == GTK_POS_RIGHT)
gtk_render_line (context, cr,
handle_position == GTK_POS_LEFT ? DRAG_HANDLE_SIZE : 0,
allocation_height / 2,
handle_position == GTK_POS_LEFT ? allocation_width : allocation_width - DRAG_HANDLE_SIZE,
allocation_height / 2);
else
gtk_render_line (context, cr,
allocation_width / 2,
handle_position == GTK_POS_TOP ? DRAG_HANDLE_SIZE : 0,
allocation_width / 2,
handle_position == GTK_POS_TOP ? allocation_height : allocation_height - DRAG_HANDLE_SIZE);
gtk_style_context_restore (context);
}
void
gtk_handle_box_set_shadow_type (GtkHandleBox *handle_box,
GtkShadowType type)
{
GtkHandleBoxPrivate *priv;
g_return_if_fail (GTK_IS_HANDLE_BOX (handle_box));
priv = handle_box->priv;
if ((GtkShadowType) priv->shadow_type != type)
{
priv->shadow_type = type;
g_object_notify (G_OBJECT (handle_box), "shadow-type");
gtk_widget_queue_resize (GTK_WIDGET (handle_box));
}
}
/**
* gtk_handle_box_get_shadow_type:
* @handle_box: a #GtkHandleBox
*
* Gets the type of shadow drawn around the handle box. See
* gtk_handle_box_set_shadow_type().
*
* Return value: the type of shadow currently drawn around the handle box.
**/
GtkShadowType
gtk_handle_box_get_shadow_type (GtkHandleBox *handle_box)
{
g_return_val_if_fail (GTK_IS_HANDLE_BOX (handle_box), GTK_SHADOW_ETCHED_OUT);
return handle_box->priv->shadow_type;
}
void
gtk_handle_box_set_handle_position (GtkHandleBox *handle_box,
GtkPositionType position)
{
GtkHandleBoxPrivate *priv;
g_return_if_fail (GTK_IS_HANDLE_BOX (handle_box));
priv = handle_box->priv;
if ((GtkPositionType) priv->handle_position != position)
{
priv->handle_position = position;
g_object_notify (G_OBJECT (handle_box), "handle-position");
gtk_widget_queue_resize (GTK_WIDGET (handle_box));
}
}
/**
* gtk_handle_box_get_handle_position:
* @handle_box: a #GtkHandleBox
*
* Gets the handle position of the handle box. See
* gtk_handle_box_set_handle_position().
*
* Return value: the current handle position.
**/
GtkPositionType
gtk_handle_box_get_handle_position (GtkHandleBox *handle_box)
{
g_return_val_if_fail (GTK_IS_HANDLE_BOX (handle_box), GTK_POS_LEFT);
return handle_box->priv->handle_position;
}
void
gtk_handle_box_set_snap_edge (GtkHandleBox *handle_box,
GtkPositionType edge)
{
GtkHandleBoxPrivate *priv;
g_return_if_fail (GTK_IS_HANDLE_BOX (handle_box));
priv = handle_box->priv;
if (priv->snap_edge != edge)
{
priv->snap_edge = edge;
g_object_freeze_notify (G_OBJECT (handle_box));
g_object_notify (G_OBJECT (handle_box), "snap-edge");
g_object_notify (G_OBJECT (handle_box), "snap-edge-set");
g_object_thaw_notify (G_OBJECT (handle_box));
}
}
/**
* gtk_handle_box_get_snap_edge:
* @handle_box: a #GtkHandleBox
*
* Gets the edge used for determining reattachment of the handle box. See
* gtk_handle_box_set_snap_edge().
*
* Return value: the edge used for determining reattachment, or (GtkPositionType)-1 if this
* is determined (as per default) from the handle position.
**/
GtkPositionType
gtk_handle_box_get_snap_edge (GtkHandleBox *handle_box)
{
g_return_val_if_fail (GTK_IS_HANDLE_BOX (handle_box), (GtkPositionType)-1);
return handle_box->priv->snap_edge;
}
/**
* gtk_handle_box_get_child_detached:
* @handle_box: a #GtkHandleBox
*
* Whether the handlebox's child is currently detached.
*
* Return value: %TRUE if the child is currently detached, otherwise %FALSE
*
* Since: 2.14
**/
gboolean
gtk_handle_box_get_child_detached (GtkHandleBox *handle_box)
{
g_return_val_if_fail (GTK_IS_HANDLE_BOX (handle_box), FALSE);
return handle_box->priv->child_detached;
}
static void
gtk_handle_box_paint (GtkWidget *widget,
cairo_t *cr)
{
GtkHandleBox *hb = GTK_HANDLE_BOX (widget);
GtkHandleBoxPrivate *priv = hb->priv;
GtkBin *bin = GTK_BIN (widget);
GtkStyleContext *context;
GtkStateFlags state;
GtkWidget *child;
gint width, height;
GdkRectangle rect;
gint handle_position;
handle_position = effective_handle_position (hb);
width = gdk_window_get_width (priv->bin_window);
height = gdk_window_get_height (priv->bin_window);
context = gtk_widget_get_style_context (widget);
state = gtk_widget_get_state_flags (widget);
gtk_style_context_save (context);
gtk_style_context_set_state (context, state);
gtk_render_background (context, cr, 0, 0, width, height);
gtk_render_frame (context, cr, 0, 0, width, height);
switch (handle_position)
{
case GTK_POS_LEFT:
rect.x = 0;
rect.y = 0;
rect.width = DRAG_HANDLE_SIZE;
rect.height = height;
break;
case GTK_POS_RIGHT:
rect.x = width - DRAG_HANDLE_SIZE;
rect.y = 0;
rect.width = DRAG_HANDLE_SIZE;
rect.height = height;
break;
case GTK_POS_TOP:
rect.x = 0;
rect.y = 0;
rect.width = width;
rect.height = DRAG_HANDLE_SIZE;
break;
case GTK_POS_BOTTOM:
rect.x = 0;
rect.y = height - DRAG_HANDLE_SIZE;
rect.width = width;
rect.height = DRAG_HANDLE_SIZE;
break;
default:
g_assert_not_reached ();
break;
}
gtk_render_handle (context, cr,
rect.x, rect.y, rect.width, rect.height);
child = gtk_bin_get_child (bin);
if (child != NULL && gtk_widget_get_visible (child))
GTK_WIDGET_CLASS (gtk_handle_box_parent_class)->draw (widget, cr);
gtk_style_context_restore (context);
}
static gboolean
gtk_handle_box_draw (GtkWidget *widget,
cairo_t *cr)
{
GtkHandleBox *hb = GTK_HANDLE_BOX (widget);
GtkHandleBoxPrivate *priv = hb->priv;
if (gtk_cairo_should_draw_window (cr, gtk_widget_get_window (widget)))
{
if (priv->child_detached)
gtk_handle_box_draw_ghost (hb, cr);
}
else if (gtk_cairo_should_draw_window (cr, priv->bin_window))
gtk_handle_box_paint (widget, cr);
return FALSE;
}
static GtkWidget *
gtk_handle_box_get_invisible (void)
{
static GtkWidget *handle_box_invisible = NULL;
if (!handle_box_invisible)
{
handle_box_invisible = gtk_invisible_new ();
gtk_widget_show (handle_box_invisible);
}
return handle_box_invisible;
}
static gboolean
gtk_handle_box_grab_event (GtkWidget *widget,
GdkEvent *event,
GtkHandleBox *hb)
{
GtkHandleBoxPrivate *priv = hb->priv;
switch (event->type)
{
case GDK_BUTTON_RELEASE:
if (priv->in_drag) /* sanity check */
{
gtk_handle_box_end_drag (hb, event->button.time);
return TRUE;
}
break;
case GDK_MOTION_NOTIFY:
return gtk_handle_box_motion (GTK_WIDGET (hb), (GdkEventMotion *)event);
break;
default:
break;
}
return FALSE;
}
static gboolean
gtk_handle_box_button_press (GtkWidget *widget,
GdkEventButton *event)
{
GtkHandleBox *hb = GTK_HANDLE_BOX (widget);
GtkHandleBoxPrivate *priv = hb->priv;
gboolean event_handled;
GdkCursor *fleur;
gint handle_position;
handle_position = effective_handle_position (hb);
event_handled = FALSE;
if ((event->button == 1) &&
(event->type == GDK_BUTTON_PRESS || event->type == GDK_2BUTTON_PRESS))
{
GtkWidget *child;
gboolean in_handle;
if (event->window != priv->bin_window)
return FALSE;
child = gtk_bin_get_child (GTK_BIN (hb));
if (child)
{
GtkAllocation child_allocation;
guint border_width;
gtk_widget_get_allocation (child, &child_allocation);
border_width = gtk_container_get_border_width (GTK_CONTAINER (hb));
switch (handle_position)
{
case GTK_POS_LEFT:
in_handle = event->x < DRAG_HANDLE_SIZE;
break;
case GTK_POS_TOP:
in_handle = event->y < DRAG_HANDLE_SIZE;
break;
case GTK_POS_RIGHT:
in_handle = event->x > 2 * border_width + child_allocation.width;
break;
case GTK_POS_BOTTOM:
in_handle = event->y > 2 * border_width + child_allocation.height;
break;
default:
in_handle = FALSE;
break;
}
}
else
{
in_handle = FALSE;
event_handled = TRUE;
}
if (in_handle)
{
if (event->type == GDK_BUTTON_PRESS) /* Start a drag */
{
GtkWidget *invisible = gtk_handle_box_get_invisible ();
GdkWindow *window;
gint root_x, root_y;
gtk_invisible_set_screen (GTK_INVISIBLE (invisible),
gtk_widget_get_screen (GTK_WIDGET (hb)));
gdk_window_get_origin (priv->bin_window, &root_x, &root_y);
priv->orig_x = event->x_root;
priv->orig_y = event->y_root;
priv->float_allocation.x = root_x - event->x_root;
priv->float_allocation.y = root_y - event->y_root;
priv->float_allocation.width = gdk_window_get_width (priv->bin_window);
priv->float_allocation.height = gdk_window_get_height (priv->bin_window);
window = gtk_widget_get_window (widget);
if (gdk_window_is_viewable (window))
{
gdk_window_get_origin (window, &root_x, &root_y);
priv->attach_allocation.x = root_x;
priv->attach_allocation.y = root_y;
priv->attach_allocation.width = gdk_window_get_width (window);
priv->attach_allocation.height = gdk_window_get_height (window);
}
else
{
priv->attach_allocation.x = -1;
priv->attach_allocation.y = -1;
priv->attach_allocation.width = 0;
priv->attach_allocation.height = 0;
}
priv->in_drag = TRUE;
priv->grab_device = event->device;
fleur = gdk_cursor_new_for_display (gtk_widget_get_display (widget),
GDK_FLEUR);
if (gdk_device_grab (event->device,
gtk_widget_get_window (invisible),
GDK_OWNERSHIP_WINDOW,
FALSE,
(GDK_BUTTON1_MOTION_MASK |
GDK_POINTER_MOTION_HINT_MASK |
GDK_BUTTON_RELEASE_MASK),
fleur,
event->time) != GDK_GRAB_SUCCESS)
{
priv->in_drag = FALSE;
priv->grab_device = NULL;
}
else
{
gtk_device_grab_add (invisible, priv->grab_device, TRUE);
g_signal_connect (invisible, "event",
G_CALLBACK (gtk_handle_box_grab_event), hb);
}
g_object_unref (fleur);
event_handled = TRUE;
}
else if (priv->child_detached) /* Double click */
{
gtk_handle_box_reattach (hb);
}
}
}
return event_handled;
}
static gboolean
gtk_handle_box_motion (GtkWidget *widget,
GdkEventMotion *event)
{
GtkHandleBox *hb = GTK_HANDLE_BOX (widget);
GtkHandleBoxPrivate *priv = hb->priv;
GtkWidget *child;
gint new_x, new_y;
gint snap_edge;
gboolean is_snapped = FALSE;
gint handle_position;
GdkGeometry geometry;
GdkScreen *screen, *pointer_screen;
if (!priv->in_drag)
return FALSE;
handle_position = effective_handle_position (hb);
/* Calculate the attachment point on the float, if the float
* were detached
*/
new_x = 0;
new_y = 0;
screen = gtk_widget_get_screen (widget);
gdk_device_get_position (event->device,
&pointer_screen,
&new_x, &new_y);
if (pointer_screen != screen)
{
new_x = priv->orig_x;
new_y = priv->orig_y;
}
new_x += priv->float_allocation.x;
new_y += priv->float_allocation.y;
snap_edge = priv->snap_edge;
if (snap_edge == -1)
snap_edge = (handle_position == GTK_POS_LEFT ||
handle_position == GTK_POS_RIGHT) ?
GTK_POS_TOP : GTK_POS_LEFT;
if (gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL)
switch (snap_edge)
{
case GTK_POS_LEFT:
snap_edge = GTK_POS_RIGHT;
break;
case GTK_POS_RIGHT:
snap_edge = GTK_POS_LEFT;
break;
default:
break;
}
/* First, check if the snapped edge is aligned
*/
switch (snap_edge)
{
case GTK_POS_TOP:
is_snapped = abs (priv->attach_allocation.y - new_y) < TOLERANCE;
break;
case GTK_POS_BOTTOM:
is_snapped = abs (priv->attach_allocation.y + (gint)priv->attach_allocation.height -
new_y - (gint)priv->float_allocation.height) < TOLERANCE;
break;
case GTK_POS_LEFT:
is_snapped = abs (priv->attach_allocation.x - new_x) < TOLERANCE;
break;
case GTK_POS_RIGHT:
is_snapped = abs (priv->attach_allocation.x + (gint)priv->attach_allocation.width -
new_x - (gint)priv->float_allocation.width) < TOLERANCE;
break;
}
/* Next, check if coordinates in the other direction are sufficiently
* aligned
*/
if (is_snapped)
{
gint float_pos1 = 0; /* Initialize to suppress warnings */
gint float_pos2 = 0;
gint attach_pos1 = 0;
gint attach_pos2 = 0;
switch (snap_edge)
{
case GTK_POS_TOP:
case GTK_POS_BOTTOM:
attach_pos1 = priv->attach_allocation.x;
attach_pos2 = priv->attach_allocation.x + priv->attach_allocation.width;
float_pos1 = new_x;
float_pos2 = new_x + priv->float_allocation.width;
break;
case GTK_POS_LEFT:
case GTK_POS_RIGHT:
attach_pos1 = priv->attach_allocation.y;
attach_pos2 = priv->attach_allocation.y + priv->attach_allocation.height;
float_pos1 = new_y;
float_pos2 = new_y + priv->float_allocation.height;
break;
}
is_snapped = ((attach_pos1 - TOLERANCE < float_pos1) &&
(attach_pos2 + TOLERANCE > float_pos2)) ||
((float_pos1 - TOLERANCE < attach_pos1) &&
(float_pos2 + TOLERANCE > attach_pos2));
}
child = gtk_bin_get_child (GTK_BIN (hb));
if (is_snapped)
{
if (priv->child_detached)
{
priv->child_detached = FALSE;
gdk_window_hide (priv->float_window);
gdk_window_reparent (priv->bin_window, gtk_widget_get_window (widget), 0, 0);
priv->float_window_mapped = FALSE;
g_signal_emit (hb,
handle_box_signals[SIGNAL_CHILD_ATTACHED],
0,
child);
gtk_widget_queue_resize (widget);
}
}
else
{
gint width, height;
width = gdk_window_get_width (priv->float_window);
height = gdk_window_get_height (priv->float_window);
switch (handle_position)
{
case GTK_POS_LEFT:
new_y += ((gint)priv->float_allocation.height - height) / 2;
break;
case GTK_POS_RIGHT:
new_x += (gint)priv->float_allocation.width - width;
new_y += ((gint)priv->float_allocation.height - height) / 2;
break;
case GTK_POS_TOP:
new_x += ((gint)priv->float_allocation.width - width) / 2;
break;
case GTK_POS_BOTTOM:
new_x += ((gint)priv->float_allocation.width - width) / 2;
new_y += (gint)priv->float_allocation.height - height;
break;
}
if (priv->child_detached)
{
gdk_window_move (priv->float_window, new_x, new_y);
gdk_window_raise (priv->float_window);
}
else
{
guint border_width;
GtkRequisition child_requisition;
priv->child_detached = TRUE;
if (child)
{
gtk_widget_get_preferred_size (child, &child_requisition, NULL);
}
else
{
child_requisition.width = 0;
child_requisition.height = 0;
}
border_width = gtk_container_get_border_width (GTK_CONTAINER (hb));
width = child_requisition.width + 2 * border_width;
height = child_requisition.height + 2 * border_width;
if (handle_position == GTK_POS_LEFT || handle_position == GTK_POS_RIGHT)
width += DRAG_HANDLE_SIZE;
else
height += DRAG_HANDLE_SIZE;
gdk_window_move_resize (priv->float_window, new_x, new_y, width, height);
gdk_window_reparent (priv->bin_window, priv->float_window, 0, 0);
gdk_window_set_geometry_hints (priv->float_window, &geometry, GDK_HINT_POS);
gdk_window_show (priv->float_window);
priv->float_window_mapped = TRUE;
#if 0
/* this extra move is necessary if we use decorations, or our
* window manager insists on decorations.
*/
gdk_display_sync (gtk_widget_get_display (widget));
gdk_window_move (priv->float_window, new_x, new_y);
gdk_display_sync (gtk_widget_get_display (widget));
#endif /* 0 */
g_signal_emit (hb,
handle_box_signals[SIGNAL_CHILD_DETACHED],
0,
child);
gtk_widget_queue_resize (widget);
}
}
return TRUE;
}
static void
gtk_handle_box_add (GtkContainer *container,
GtkWidget *widget)
{
GtkHandleBoxPrivate *priv = GTK_HANDLE_BOX (container)->priv;
gtk_widget_set_parent_window (widget, priv->bin_window);
GTK_CONTAINER_CLASS (gtk_handle_box_parent_class)->add (container, widget);
}
static void
gtk_handle_box_remove (GtkContainer *container,
GtkWidget *widget)
{
GTK_CONTAINER_CLASS (gtk_handle_box_parent_class)->remove (container, widget);
gtk_handle_box_reattach (GTK_HANDLE_BOX (container));
}
static gint
gtk_handle_box_delete_event (GtkWidget *widget,
GdkEventAny *event)
{
GtkHandleBox *hb = GTK_HANDLE_BOX (widget);
GtkHandleBoxPrivate *priv = hb->priv;
if (event->window == priv->float_window)
{
gtk_handle_box_reattach (hb);
return TRUE;
}
return FALSE;
}
static void
gtk_handle_box_reattach (GtkHandleBox *hb)
{
GtkHandleBoxPrivate *priv = hb->priv;
GtkWidget *child;
GtkWidget *widget = GTK_WIDGET (hb);
if (priv->child_detached)
{
priv->child_detached = FALSE;
if (gtk_widget_get_realized (widget))
{
gdk_window_hide (priv->float_window);
gdk_window_reparent (priv->bin_window, gtk_widget_get_window (widget),
0, 0);
child = gtk_bin_get_child (GTK_BIN (hb));
if (child)
g_signal_emit (hb,
handle_box_signals[SIGNAL_CHILD_ATTACHED],
0,
child);
}
priv->float_window_mapped = FALSE;
}
if (priv->in_drag)
gtk_handle_box_end_drag (hb, GDK_CURRENT_TIME);
gtk_widget_queue_resize (GTK_WIDGET (hb));
}
static void
gtk_handle_box_end_drag (GtkHandleBox *hb,
guint32 time)
{
GtkHandleBoxPrivate *priv = hb->priv;
GtkWidget *invisible = gtk_handle_box_get_invisible ();
priv->in_drag = FALSE;
gtk_device_grab_remove (invisible, priv->grab_device);
gdk_device_ungrab (priv->grab_device, time);
g_signal_handlers_disconnect_by_func (invisible,
G_CALLBACK (gtk_handle_box_grab_event),
hb);
priv->grab_device = NULL;
}
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