/* EPaned - A slightly more advanced paned widget.
* Copyright (C) 2000 Helix Code, Inc.
*
* Author: Christopher James Lahey <clahey@helixcode.com>
*
* based on GtkPaned from Gtk+. Gtk+ Copyright notice follows.
*/
/* 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 Library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library 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 1997-1999. 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 "e-hpaned.h"
static void e_hpaned_class_init (EHPanedClass *klass);
static void e_hpaned_init (EHPaned *hpaned);
static void e_hpaned_size_request (GtkWidget *widget,
GtkRequisition *requisition);
static void e_hpaned_size_allocate (GtkWidget *widget,
GtkAllocation *allocation);
static void e_hpaned_draw (GtkWidget *widget,
GdkRectangle *area);
static void e_hpaned_xor_line (EPaned *paned);
static gboolean e_hpaned_button_press (GtkWidget *widget,
GdkEventButton *event);
static gboolean e_hpaned_button_release (GtkWidget *widget,
GdkEventButton *event);
static gboolean e_hpaned_motion (GtkWidget *widget,
GdkEventMotion *event);
static gboolean e_hpaned_handle_shown (EPaned *paned);
GtkType
e_hpaned_get_type (void)
{
static GtkType hpaned_type = 0;
if (!hpaned_type)
{
static const GtkTypeInfo hpaned_info =
{
"EHPaned",
sizeof (EHPaned),
sizeof (EHPanedClass),
(GtkClassInitFunc) e_hpaned_class_init,
(GtkObjectInitFunc) e_hpaned_init,
/* reserved_1 */ NULL,
/* reserved_2 */ NULL,
(GtkClassInitFunc) NULL,
};
hpaned_type = gtk_type_unique (E_TYPE_PANED, &hpaned_info);
}
return hpaned_type;
}
static void
e_hpaned_class_init (EHPanedClass *klass)
{
GtkWidgetClass *widget_class;
EPanedClass *paned_class;
widget_class = (GtkWidgetClass *) klass;
paned_class = E_PANED_CLASS (klass);
widget_class->size_request = e_hpaned_size_request;
widget_class->size_allocate = e_hpaned_size_allocate;
widget_class->draw = e_hpaned_draw;
widget_class->button_press_event = e_hpaned_button_press;
widget_class->button_release_event = e_hpaned_button_release;
widget_class->motion_notify_event = e_hpaned_motion;
paned_class->handle_shown = e_hpaned_handle_shown;
}
static void
e_hpaned_init (EHPaned *hpaned)
{
EPaned *paned;
g_return_if_fail (hpaned != NULL);
g_return_if_fail (E_IS_PANED (hpaned));
paned = E_PANED (hpaned);
paned->cursor_type = GDK_SB_H_DOUBLE_ARROW;
}
GtkWidget *
e_hpaned_new (void)
{
EHPaned *hpaned;
hpaned = gtk_type_new (E_TYPE_HPANED);
return GTK_WIDGET (hpaned);
}
static void
e_hpaned_size_request (GtkWidget *widget,
GtkRequisition *requisition)
{
EPaned *paned;
GtkRequisition child_requisition;
g_return_if_fail (widget != NULL);
g_return_if_fail (E_IS_HPANED (widget));
g_return_if_fail (requisition != NULL);
paned = E_PANED (widget);
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->height = MAX(requisition->height, child_requisition.height);
requisition->width += child_requisition.width;
}
requisition->width += GTK_CONTAINER (paned)->border_width * 2;
requisition->height += GTK_CONTAINER (paned)->border_width * 2;
if (e_paned_handle_shown(paned))
requisition->width += paned->handle_size;
}
static void
e_hpaned_size_allocate (GtkWidget *widget,
GtkAllocation *allocation)
{
EPaned *paned;
GtkRequisition child1_requisition;
GtkRequisition child2_requisition;
GtkAllocation child1_allocation;
GtkAllocation child2_allocation;
gint border_width;
gboolean handle_shown;
g_return_if_fail (widget != NULL);
g_return_if_fail (E_IS_HPANED (widget));
g_return_if_fail (allocation != NULL);
widget->allocation = *allocation;
paned = E_PANED (widget);
border_width = GTK_CONTAINER (paned)->border_width;
if (paned->child1 && GTK_WIDGET_VISIBLE (paned->child1))
gtk_widget_get_child_requisition (paned->child1, &child1_requisition);
else
child1_requisition.width = 0;
if (paned->child2 && GTK_WIDGET_VISIBLE (paned->child2))
gtk_widget_get_child_requisition (paned->child2, &child2_requisition);
else
child2_requisition.width = 0;
e_paned_compute_position (paned,
MAX (1, (gint) widget->allocation.width
- 2 * border_width),
child1_requisition.width,
child2_requisition.width);
/* Move the handle before the children so we don't get extra expose events */
if (GTK_WIDGET_REALIZED (widget))
gdk_window_move_resize (widget->window,
allocation->x, allocation->y,
allocation->width,
allocation->height);
handle_shown = e_paned_handle_shown(paned);
if (handle_shown)
{
paned->handle_xpos = paned->child1_size + border_width;
paned->handle_ypos = border_width;
paned->handle_width = paned->handle_size;
paned->handle_height = MAX (1, (gint) widget->allocation.height - 2 * border_width);
if (GTK_WIDGET_REALIZED (widget))
{
gdk_window_move_resize (paned->handle,
paned->handle_xpos,
paned->handle_ypos,
paned->handle_size,
paned->handle_height);
if (paned->handle)
gdk_window_show(paned->handle);
}
}
else
{
if (paned->handle && GTK_WIDGET_REALIZED (widget))
gdk_window_hide(paned->handle);
}
child1_allocation.height = child2_allocation.height = MAX (1, (gint) allocation->height - border_width * 2);
child1_allocation.width = paned->child1_size;
child1_allocation.x = border_width;
child1_allocation.y = child2_allocation.y = border_width;
if (handle_shown)
child2_allocation.x = child1_allocation.x + child1_allocation.width + paned->handle_width;
else
child2_allocation.x = child1_allocation.x + child1_allocation.width;
child2_allocation.width = MAX (1, (gint) allocation->width - child2_allocation.x - border_width);
/* Now allocate the childen, making sure, when resizing not to
* overlap the windows */
if (GTK_WIDGET_MAPPED (widget) &&
paned->child1 && GTK_WIDGET_VISIBLE (paned->child1) &&
paned->child1->allocation.width < child1_allocation.width)
{
if (paned->child2 && GTK_WIDGET_VISIBLE (paned->child2))
gtk_widget_size_allocate (paned->child2, &child2_allocation);
gtk_widget_size_allocate (paned->child1, &child1_allocation);
}
else
{
if (paned->child1 && GTK_WIDGET_VISIBLE (paned->child1))
gtk_widget_size_allocate (paned->child1, &child1_allocation);
if (paned->child2 && GTK_WIDGET_VISIBLE (paned->child2))
gtk_widget_size_allocate (paned->child2, &child2_allocation);
}
}
static void
e_hpaned_draw (GtkWidget *widget,
GdkRectangle *area)
{
EPaned *paned;
GdkRectangle handle_area, child_area;
guint16 border_width;
g_return_if_fail (widget != NULL);
g_return_if_fail (E_IS_PANED (widget));
if (GTK_WIDGET_VISIBLE (widget) && GTK_WIDGET_MAPPED (widget))
{
paned = E_PANED (widget);
border_width = GTK_CONTAINER (paned)->border_width;
gdk_window_clear_area (widget->window,
area->x, area->y, area->width,
area->height);
if (e_paned_handle_shown(paned))
{
handle_area.x = paned->handle_xpos;
handle_area.y = paned->handle_ypos;
handle_area.width = paned->handle_size;
handle_area.height = paned->handle_height;
if (gdk_rectangle_intersect (&handle_area, area, &child_area))
{
child_area.x -= paned->handle_xpos;
child_area.y -= paned->handle_ypos;
gtk_paint_handle (widget->style,
paned->handle,
GTK_STATE_NORMAL,
GTK_SHADOW_NONE,
&child_area,
widget,
"paned",
0, 0, -1, -1,
GTK_ORIENTATION_VERTICAL);
}
}
/* Redraw the children
*/
if (paned->child1 && gtk_widget_intersect (paned->child1, area, &child_area))
gtk_widget_draw(paned->child1, &child_area);
if (paned->child2 && gtk_widget_intersect(paned->child2, area, &child_area))
gtk_widget_draw(paned->child2, &child_area);
}
}
static void
e_hpaned_xor_line (EPaned *paned)
{
GtkWidget *widget;
GdkGCValues values;
guint16 xpos;
widget = GTK_WIDGET(paned);
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);
xpos = paned->child1_size
+ GTK_CONTAINER (paned)->border_width + paned->handle_size / 2;
gdk_draw_line (widget->window, paned->xor_gc,
xpos,
0,
xpos,
widget->allocation.height - 1);
}
static gboolean
e_hpaned_button_press (GtkWidget *widget,
GdkEventButton *event)
{
EPaned *paned;
g_return_val_if_fail (widget != NULL, FALSE);
g_return_val_if_fail (E_IS_PANED (widget), FALSE);
paned = E_PANED (widget);
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->x - paned->handle_size / 2;
paned->child1_size = CLAMP (paned->child1_size, 0,
widget->allocation.width
- paned->handle_size
- 2 * GTK_CONTAINER (paned)->border_width);
e_hpaned_xor_line (paned);
return TRUE;
}
return FALSE;
}
static gboolean
e_hpaned_button_release (GtkWidget *widget,
GdkEventButton *event)
{
EPaned *paned;
g_return_val_if_fail (widget != NULL, FALSE);
g_return_val_if_fail (E_IS_PANED (widget), FALSE);
paned = E_PANED (widget);
if (paned->in_drag && (event->button == 1))
{
e_hpaned_xor_line (paned);
paned->in_drag = FALSE;
paned->position_set = TRUE;
gdk_pointer_ungrab (event->time);
gtk_widget_queue_resize (GTK_WIDGET (paned));
return TRUE;
}
return FALSE;
}
static gboolean
e_hpaned_motion (GtkWidget *widget,
GdkEventMotion *event)
{
EPaned *paned;
gint x;
g_return_val_if_fail (widget != NULL, FALSE);
g_return_val_if_fail (E_IS_PANED (widget), FALSE);
paned = E_PANED (widget);
if (event->is_hint || event->window != widget->window)
gtk_widget_get_pointer(widget, &x, NULL);
else
x = event->x;
if (paned->in_drag)
{
gint size = x - GTK_CONTAINER (paned)->border_width - paned->handle_size / 2;
e_hpaned_xor_line (paned);
paned->child1_size = CLAMP (size, paned->min_position, paned->max_position);
e_hpaned_xor_line (paned);
}
return TRUE;
}
static gboolean
e_hpaned_handle_shown (EPaned *paned)
{
return ((paned->child1 && paned->child2) &&
(GTK_WIDGET_VISIBLE (paned->child1) && GTK_WIDGET_VISIBLE (paned->child2)) &&
(GTK_WIDGET(paned->child1)->requisition.width > 0 && GTK_WIDGET(paned->child2)->requisition.width > 0));
}
