gtk2/gtk/gtkvpaned.c
Owen Taylor 4e2b60ac4d Patch from Matthias Clasen to remove remove all instances of
Wed Jul 18 19:28:46 2001  Owen Taylor  <otaylor@redhat.com>

	* gtk/*.c: Patch from Matthias Clasen to remove remove
	all instances of g_return_if_fail (foo != NULL); that are
	immediately before a g_return_if_fail (GTK_IS_FOO (foo));
	since the second check catches the NULL anyways.
2001-07-18 23:39:26 +00:00

404 lines
12 KiB
C

/* 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 "gtkvpaned.h"
static void gtk_vpaned_class_init (GtkVPanedClass *klass);
static void gtk_vpaned_init (GtkVPaned *vpaned);
static void gtk_vpaned_size_request (GtkWidget *widget,
GtkRequisition *requisition);
static void gtk_vpaned_size_allocate (GtkWidget *widget,
GtkAllocation *allocation);
static gint gtk_vpaned_expose (GtkWidget *widget,
GdkEventExpose *expose);
static void gtk_vpaned_xor_line (GtkPaned *paned);
static gboolean gtk_vpaned_button_press (GtkWidget *widget,
GdkEventButton *event);
static gboolean gtk_vpaned_button_release (GtkWidget *widget,
GdkEventButton *event);
static gboolean gtk_vpaned_motion (GtkWidget *widget,
GdkEventMotion *event);
static gpointer parent_class;
GtkType
gtk_vpaned_get_type (void)
{
static GtkType vpaned_type = 0;
if (!vpaned_type)
{
static const GtkTypeInfo vpaned_info =
{
"GtkVPaned",
sizeof (GtkVPaned),
sizeof (GtkVPanedClass),
(GtkClassInitFunc) gtk_vpaned_class_init,
(GtkObjectInitFunc) gtk_vpaned_init,
/* reserved_1 */ NULL,
/* reserved_2 */ NULL,
(GtkClassInitFunc) NULL,
};
vpaned_type = gtk_type_unique (GTK_TYPE_PANED, &vpaned_info);
}
return vpaned_type;
}
static void
gtk_vpaned_class_init (GtkVPanedClass *class)
{
GtkWidgetClass *widget_class;
parent_class = gtk_type_class (GTK_TYPE_PANED);
widget_class = (GtkWidgetClass *) class;
widget_class->size_request = gtk_vpaned_size_request;
widget_class->size_allocate = gtk_vpaned_size_allocate;
widget_class->expose_event = gtk_vpaned_expose;
widget_class->button_press_event = gtk_vpaned_button_press;
widget_class->button_release_event = gtk_vpaned_button_release;
widget_class->motion_notify_event = gtk_vpaned_motion;
}
static void
gtk_vpaned_init (GtkVPaned *vpaned)
{
GtkPaned *paned;
g_return_if_fail (GTK_IS_PANED (vpaned));
paned = GTK_PANED (vpaned);
paned->cursor_type = GDK_SB_V_DOUBLE_ARROW;
}
GtkWidget *
gtk_vpaned_new (void)
{
GtkVPaned *vpaned;
vpaned = gtk_type_new (GTK_TYPE_VPANED);
return GTK_WIDGET (vpaned);
}
static void
gtk_vpaned_size_request (GtkWidget *widget,
GtkRequisition *requisition)
{
GtkPaned *paned = GTK_PANED (widget);
GtkRequisition child_requisition;
requisition->width = 0;
requisition->height = 0;
if (paned->child1 && GTK_WIDGET_VISIBLE (paned->child1))
{
gtk_widget_size_request (paned->child1, &child_requisition);
requisition->height = child_requisition.height;
requisition->width = child_requisition.width;
}
if (paned->child2 && GTK_WIDGET_VISIBLE (paned->child2))
{
gtk_widget_size_request (paned->child2, &child_requisition);
requisition->width = MAX (requisition->width, child_requisition.width);
requisition->height += child_requisition.height;
}
requisition->height += GTK_CONTAINER (paned)->border_width * 2;
requisition->width += GTK_CONTAINER (paned)->border_width * 2;
if (paned->child1 && GTK_WIDGET_VISIBLE (paned->child1) &&
paned->child2 && GTK_WIDGET_VISIBLE (paned->child2))
{
gint handle_size;
gtk_widget_style_get (widget, "handle_size", &handle_size, NULL);
requisition->height += handle_size;
}
}
static void
gtk_vpaned_size_allocate (GtkWidget *widget,
GtkAllocation *allocation)
{
GtkPaned *paned = GTK_PANED (widget);
gint border_width = GTK_CONTAINER (paned)->border_width;
widget->allocation = *allocation;
if (GTK_WIDGET_REALIZED (widget))
gdk_window_move_resize (widget->window,
allocation->x, allocation->y,
allocation->width,
allocation->height);
if (paned->child1 && GTK_WIDGET_VISIBLE (paned->child1) &&
paned->child2 && GTK_WIDGET_VISIBLE (paned->child2))
{
GtkRequisition child1_requisition;
GtkRequisition child2_requisition;
GtkAllocation child1_allocation;
GtkAllocation child2_allocation;
gint handle_size;
gtk_widget_style_get (widget, "handle_size", &handle_size, NULL);
gtk_widget_get_child_requisition (paned->child1, &child1_requisition);
gtk_widget_get_child_requisition (paned->child2, &child2_requisition);
gtk_paned_compute_position (paned,
MAX (1, widget->allocation.height
- handle_size
- 2 * border_width),
child1_requisition.height,
child2_requisition.height);
/* Move the handle before the children so we don't get extra expose events */
paned->handle_xpos = border_width;
paned->handle_ypos = paned->child1_size + border_width;
paned->handle_width = MAX (1, (gint) widget->allocation.width - 2 * border_width);
paned->handle_height = handle_size;
if (GTK_WIDGET_REALIZED(widget))
{
gdk_window_show (paned->handle);
gdk_window_move_resize (paned->handle,
paned->handle_xpos,
paned->handle_ypos,
paned->handle_width,
handle_size);
}
child1_allocation.width = child2_allocation.width = MAX (1, (gint) allocation->width - border_width * 2);
child1_allocation.height = paned->child1_size;
child1_allocation.x = child2_allocation.x = border_width;
child1_allocation.y = border_width;
child2_allocation.y = child1_allocation.y + child1_allocation.height + paned->handle_height;
child2_allocation.height = MAX(1, (gint) allocation->height - child2_allocation.y - border_width);
/* Now allocate the childen, making sure, when resizing not to
* overlap the windows */
if (GTK_WIDGET_MAPPED (widget) &&
paned->child1->allocation.height < child1_allocation.height)
{
gtk_widget_size_allocate(paned->child2, &child2_allocation);
gtk_widget_size_allocate(paned->child1, &child1_allocation);
}
else
{
gtk_widget_size_allocate(paned->child1, &child1_allocation);
gtk_widget_size_allocate(paned->child2, &child2_allocation);
}
}
else
{
GtkAllocation child_allocation;
if (GTK_WIDGET_REALIZED (widget))
gdk_window_hide (paned->handle);
child_allocation.x = border_width;
child_allocation.y = border_width;
child_allocation.width = MAX (1, allocation->width - 2 * border_width);
child_allocation.height = MAX (1, allocation->height - 2 * border_width);
if (paned->child1 && GTK_WIDGET_VISIBLE (paned->child1))
gtk_widget_size_allocate (paned->child1, &child_allocation);
else if (paned->child2 && GTK_WIDGET_VISIBLE (paned->child2))
gtk_widget_size_allocate (paned->child2, &child_allocation);
}
}
static gint
gtk_vpaned_expose (GtkWidget *widget,
GdkEventExpose *event)
{
GtkPaned *paned;
guint16 border_width;
g_return_val_if_fail (GTK_IS_PANED (widget), FALSE);
if (GTK_WIDGET_VISIBLE (widget) && GTK_WIDGET_MAPPED (widget))
{
paned = GTK_PANED (widget);
border_width = GTK_CONTAINER (paned)->border_width;
if (event->window == widget->window)
{
gdk_window_clear_area (widget->window,
event->area.x, event->area.y,
event->area.width,
event->area.height);
/* Chain up to draw children */
GTK_WIDGET_CLASS (parent_class)->expose_event (widget, event);
}
else if (event->window == paned->handle)
{
gtk_paint_handle (widget->style,
paned->handle,
GTK_STATE_NORMAL,
GTK_SHADOW_NONE,
&event->area,
widget,
"paned",
0, 0, -1, -1,
GTK_ORIENTATION_HORIZONTAL);
}
}
return FALSE;
}
static void
gtk_vpaned_xor_line (GtkPaned *paned)
{
GtkWidget *widget;
GdkGCValues values;
guint16 ypos;
gint handle_size;
widget = GTK_WIDGET (paned);
gtk_widget_style_get (widget, "handle_size", &handle_size, NULL);
if (!paned->xor_gc)
{
values.function = GDK_INVERT;
values.subwindow_mode = GDK_INCLUDE_INFERIORS;
paned->xor_gc = gdk_gc_new_with_values (widget->window,
&values,
GDK_GC_FUNCTION | GDK_GC_SUBWINDOW);
}
gdk_gc_set_line_attributes (paned->xor_gc, 2, GDK_LINE_SOLID,
GDK_CAP_NOT_LAST, GDK_JOIN_BEVEL);
ypos = paned->child1_size
+ GTK_CONTAINER (paned)->border_width + handle_size / 2;
gdk_draw_line (widget->window, paned->xor_gc,
0,
ypos,
widget->allocation.width - 1,
ypos);
}
static gboolean
gtk_vpaned_button_press (GtkWidget *widget,
GdkEventButton *event)
{
GtkPaned *paned = GTK_PANED (widget);
gint handle_size;
gtk_widget_style_get (widget, "handle_size", &handle_size, NULL);
if (!paned->in_drag &&
(event->window == paned->handle) && (event->button == 1))
{
paned->in_drag = TRUE;
/* We need a server grab here, not gtk_grab_add(), since
* we don't want to pass events on to the widget's children */
gdk_pointer_grab (paned->handle, FALSE,
GDK_POINTER_MOTION_HINT_MASK
| GDK_BUTTON1_MOTION_MASK
| GDK_BUTTON_RELEASE_MASK, NULL, NULL,
event->time);
paned->child1_size += event->y - handle_size / 2;
paned->child1_size = CLAMP (paned->child1_size, 0,
widget->allocation.height -
handle_size -
2 * GTK_CONTAINER (paned)->border_width);
gtk_vpaned_xor_line(paned);
return TRUE;
}
return FALSE;
}
static gboolean
gtk_vpaned_button_release (GtkWidget *widget,
GdkEventButton *event)
{
GtkPaned *paned = GTK_PANED (widget);
GObject *object = G_OBJECT (widget);
if (paned->in_drag && (event->button == 1))
{
gtk_vpaned_xor_line (paned);
paned->in_drag = FALSE;
paned->position_set = TRUE;
gdk_pointer_ungrab (event->time);
gtk_widget_queue_resize (GTK_WIDGET (paned));
g_object_freeze_notify (object);
g_object_notify (object, "position");
g_object_notify (object, "position_set");
g_object_thaw_notify (object);
return TRUE;
}
return FALSE;
}
static gboolean
gtk_vpaned_motion (GtkWidget *widget,
GdkEventMotion *event)
{
GtkPaned *paned = GTK_PANED (widget);
gint y;
gint handle_size;
gtk_widget_style_get (widget, "handle_size", &handle_size, NULL);
if (event->is_hint || event->window != widget->window)
gtk_widget_get_pointer (widget, NULL, &y);
else
y = event->y;
if (paned->in_drag)
{
gint size = y - GTK_CONTAINER(paned)->border_width - handle_size / 2;
gtk_vpaned_xor_line (paned);
paned->child1_size = CLAMP (size, paned->min_position, paned->max_position);
gtk_vpaned_xor_line(paned);
}
return TRUE;
}