diff options
Diffstat (limited to 'widgets/e-paned/e-hpaned.c')
| -rw-r--r-- | widgets/e-paned/e-hpaned.c | 403 |
1 files changed, 403 insertions, 0 deletions
diff --git a/widgets/e-paned/e-hpaned.c b/widgets/e-paned/e-hpaned.c new file mode 100644 index 0000000000..b43630fff0 --- /dev/null +++ b/widgets/e-paned/e-hpaned.c @@ -0,0 +1,403 @@ +/* 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); + +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 *class) +{ + GtkWidgetClass *widget_class; + + widget_class = (GtkWidgetClass *) class; + + 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; +} + +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 + paned->handle_size; + requisition->height += GTK_CONTAINER (paned)->border_width * 2; +} + +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; + + 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_get_child_requisition (paned->child1, &child1_requisition); + else + child1_requisition.width = 0; + + if (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 + - (gint) paned->handle_size + - 2 * border_width), + child1_requisition.width, + child2_requisition.width); + + /* Move the handle before the children so we don't get extra expose events */ + + 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 (widget->window, + allocation->x, allocation->y, + allocation->width, + allocation->height); + + gdk_window_move_resize (paned->handle, + paned->handle_xpos, + paned->handle_ypos, + paned->handle_size, + paned->handle_height); + } + + 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; + + child2_allocation.x = child1_allocation.x + child1_allocation.width + paned->handle_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); + + 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; +} |