diff options
Diffstat (limited to 'widgets/e-paned/e-paned.c')
| -rw-r--r-- | widgets/e-paned/e-paned.c | 587 |
1 files changed, 587 insertions, 0 deletions
diff --git a/widgets/e-paned/e-paned.c b/widgets/e-paned/e-paned.c new file mode 100644 index 0000000000..f2db002e6e --- /dev/null +++ b/widgets/e-paned/e-paned.c @@ -0,0 +1,587 @@ +/* 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 1997-2000. 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 "e-paned.h" + +enum { + ARG_0, + ARG_HANDLE_SIZE +}; + +static void e_paned_class_init (EPanedClass *klass); +static void e_paned_init (EPaned *paned); +static void e_paned_set_arg (GtkObject *object, + GtkArg *arg, + guint arg_id); +static void e_paned_get_arg (GtkObject *object, + GtkArg *arg, + guint arg_id); +static void e_paned_realize (GtkWidget *widget); +static void e_paned_map (GtkWidget *widget); +static void e_paned_unmap (GtkWidget *widget); +static void e_paned_unrealize (GtkWidget *widget); +static gint e_paned_expose (GtkWidget *widget, + GdkEventExpose *event); +static void e_paned_add (GtkContainer *container, + GtkWidget *widget); +static void e_paned_remove (GtkContainer *container, + GtkWidget *widget); +static void e_paned_forall (GtkContainer *container, + gboolean include_internals, + GtkCallback callback, + gpointer callback_data); +static GtkType e_paned_child_type (GtkContainer *container); + +static GtkContainerClass *parent_class = NULL; + + +GtkType +e_paned_get_type (void) +{ + static GtkType paned_type = 0; + + if (!paned_type) + { + static const GtkTypeInfo paned_info = + { + "EPaned", + sizeof (EPaned), + sizeof (EPanedClass), + (GtkClassInitFunc) e_paned_class_init, + (GtkObjectInitFunc) e_paned_init, + /* reserved_1 */ NULL, + /* reserved_2 */ NULL, + (GtkClassInitFunc) NULL, + }; + + paned_type = gtk_type_unique (GTK_TYPE_CONTAINER, &paned_info); + } + + return paned_type; +} + +static void +e_paned_class_init (EPanedClass *class) +{ + GtkObjectClass *object_class; + GtkWidgetClass *widget_class; + GtkContainerClass *container_class; + + object_class = (GtkObjectClass *) class; + widget_class = (GtkWidgetClass *) class; + container_class = (GtkContainerClass *) class; + + parent_class = gtk_type_class (GTK_TYPE_CONTAINER); + + object_class->set_arg = e_paned_set_arg; + object_class->get_arg = e_paned_get_arg; + + widget_class->realize = e_paned_realize; + widget_class->map = e_paned_map; + widget_class->unmap = e_paned_unmap; + widget_class->unrealize = e_paned_unrealize; + widget_class->expose_event = e_paned_expose; + + container_class->add = e_paned_add; + container_class->remove = e_paned_remove; + container_class->forall = e_paned_forall; + container_class->child_type = e_paned_child_type; + + gtk_object_add_arg_type("EPaned::handle_size", GTK_TYPE_UINT, + GTK_ARG_READWRITE, ARG_HANDLE_SIZE); +} + +static GtkType +e_paned_child_type (GtkContainer *container) +{ + if (!E_PANED (container)->child1 || !E_PANED (container)->child2) + return GTK_TYPE_WIDGET; + else + return GTK_TYPE_NONE; +} + +static void +e_paned_init (EPaned *paned) +{ + GTK_WIDGET_UNSET_FLAGS (paned, GTK_NO_WINDOW); + + paned->child1 = NULL; + paned->child2 = NULL; + paned->handle = NULL; + paned->xor_gc = NULL; + paned->cursor_type = GDK_CROSS; + + paned->handle_width = 5; + paned->handle_height = 5; + paned->handle_size = 5; + paned->position_set = FALSE; + paned->last_allocation = -1; + paned->in_drag = FALSE; + + paned->handle_xpos = -1; + paned->handle_ypos = -1; +} + +static void +e_paned_set_arg (GtkObject *object, + GtkArg *arg, + guint arg_id) +{ + EPaned *paned = E_PANED (object); + + switch (arg_id) + { + case ARG_HANDLE_SIZE: + e_paned_set_handle_size (paned, GTK_VALUE_UINT (*arg)); + break; + default: + break; + } +} + +static void +e_paned_get_arg (GtkObject *object, + GtkArg *arg, + guint arg_id) +{ + EPaned *paned = E_PANED (object); + + switch (arg_id) + { + case ARG_HANDLE_SIZE: + GTK_VALUE_UINT (*arg) = paned->handle_size; + break; + default: + arg->type = GTK_TYPE_INVALID; + break; + } +} + +static void +e_paned_realize (GtkWidget *widget) +{ + EPaned *paned; + GdkWindowAttr attributes; + gint attributes_mask; + + g_return_if_fail (widget != NULL); + g_return_if_fail (E_IS_PANED (widget)); + + GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED); + paned = E_PANED (widget); + + attributes.x = widget->allocation.x; + attributes.y = widget->allocation.y; + attributes.width = widget->allocation.width; + attributes.height = widget->allocation.height; + attributes.window_type = GDK_WINDOW_CHILD; + attributes.wclass = GDK_INPUT_OUTPUT; + attributes.visual = gtk_widget_get_visual (widget); + attributes.colormap = gtk_widget_get_colormap (widget); + attributes.event_mask = gtk_widget_get_events (widget) | GDK_EXPOSURE_MASK; + attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP; + + widget->window = gdk_window_new (gtk_widget_get_parent_window(widget), + &attributes, attributes_mask); + gdk_window_set_user_data (widget->window, paned); + + attributes.x = paned->handle_xpos; + attributes.y = paned->handle_ypos; + attributes.width = paned->handle_width; + attributes.height = paned->handle_height; + attributes.cursor = gdk_cursor_new (paned->cursor_type); + attributes.event_mask |= (GDK_BUTTON_PRESS_MASK | + GDK_BUTTON_RELEASE_MASK | + GDK_POINTER_MOTION_MASK | + GDK_POINTER_MOTION_HINT_MASK); + attributes_mask |= GDK_WA_CURSOR; + + paned->handle = gdk_window_new (widget->window, + &attributes, attributes_mask); + gdk_window_set_user_data (paned->handle, paned); + gdk_cursor_destroy (attributes.cursor); + + widget->style = gtk_style_attach (widget->style, widget->window); + + gtk_style_set_background (widget->style, widget->window, GTK_STATE_NORMAL); + gtk_style_set_background (widget->style, paned->handle, GTK_STATE_NORMAL); + + gdk_window_set_back_pixmap (widget->window, NULL, TRUE); + + gdk_window_show (paned->handle); +} + +static void +e_paned_map (GtkWidget *widget) +{ + EPaned *paned; + + g_return_if_fail (widget != NULL); + g_return_if_fail (E_IS_PANED (widget)); + + GTK_WIDGET_SET_FLAGS (widget, GTK_MAPPED); + paned = E_PANED (widget); + + if (paned->child1 && + GTK_WIDGET_VISIBLE (paned->child1) && + !GTK_WIDGET_MAPPED (paned->child1)) + gtk_widget_map (paned->child1); + if (paned->child2 && + GTK_WIDGET_VISIBLE (paned->child2) && + !GTK_WIDGET_MAPPED (paned->child2)) + gtk_widget_map (paned->child2); + + gdk_window_show (widget->window); +} + +static void +e_paned_unmap (GtkWidget *widget) +{ + g_return_if_fail (widget != NULL); + g_return_if_fail (E_IS_PANED (widget)); + + GTK_WIDGET_UNSET_FLAGS (widget, GTK_MAPPED); + + gdk_window_hide (widget->window); +} + +static void +e_paned_unrealize (GtkWidget *widget) +{ + EPaned *paned; + + g_return_if_fail (widget != NULL); + g_return_if_fail (E_IS_PANED (widget)); + + paned = E_PANED (widget); + + if (paned->xor_gc) + { + gdk_gc_destroy (paned->xor_gc); + paned->xor_gc = NULL; + } + + if (paned->handle) + { + gdk_window_set_user_data (paned->handle, NULL); + gdk_window_destroy (paned->handle); + paned->handle = NULL; + } + + if (GTK_WIDGET_CLASS (parent_class)->unrealize) + (* GTK_WIDGET_CLASS (parent_class)->unrealize) (widget); +} + +static gint +e_paned_expose (GtkWidget *widget, + GdkEventExpose *event) +{ + EPaned *paned; + GdkEventExpose child_event; + + g_return_val_if_fail (widget != NULL, FALSE); + g_return_val_if_fail (E_IS_PANED (widget), FALSE); + g_return_val_if_fail (event != NULL, FALSE); + + if (GTK_WIDGET_DRAWABLE (widget)) + { + paned = E_PANED (widget); + + if (event->window == paned->handle) + { + child_event = *event; + event->area.x += paned->handle_xpos; + event->area.y += paned->handle_ypos; + gtk_widget_draw (widget, &event->area); + } + else + { + child_event = *event; + if (paned->child1 && + GTK_WIDGET_NO_WINDOW (paned->child1) && + gtk_widget_intersect (paned->child1, &event->area, &child_event.area)) + gtk_widget_event (paned->child1, (GdkEvent *) &child_event); + + if (paned->child2 && + GTK_WIDGET_NO_WINDOW (paned->child2) && + gtk_widget_intersect (paned->child2, &event->area, &child_event.area)) + gtk_widget_event (paned->child2, (GdkEvent *) &child_event); + } + } + + return FALSE; +} + +void +e_paned_add1 (EPaned *paned, + GtkWidget *widget) +{ + e_paned_pack1 (paned, widget, FALSE, TRUE); +} + +void +e_paned_add2 (EPaned *paned, + GtkWidget *widget) +{ + e_paned_pack2 (paned, widget, TRUE, TRUE); +} + +void +e_paned_pack1 (EPaned *paned, + GtkWidget *child, + gboolean resize, + gboolean shrink) +{ + g_return_if_fail (paned != NULL); + g_return_if_fail (E_IS_PANED (paned)); + g_return_if_fail (GTK_IS_WIDGET (child)); + + if (!paned->child1) + { + paned->child1 = child; + paned->child1_resize = resize; + paned->child1_shrink = shrink; + + gtk_widget_set_parent (child, GTK_WIDGET (paned)); + + if (GTK_WIDGET_REALIZED (child->parent)) + gtk_widget_realize (child); + + if (GTK_WIDGET_VISIBLE (child->parent) && GTK_WIDGET_VISIBLE (child)) + { + if (GTK_WIDGET_MAPPED (child->parent)) + gtk_widget_map (child); + + gtk_widget_queue_resize (child); + } + } +} + +void +e_paned_pack2 (EPaned *paned, + GtkWidget *child, + gboolean resize, + gboolean shrink) +{ + g_return_if_fail (paned != NULL); + g_return_if_fail (E_IS_PANED (paned)); + g_return_if_fail (GTK_IS_WIDGET (child)); + + if (!paned->child2) + { + paned->child2 = child; + paned->child2_resize = resize; + paned->child2_shrink = shrink; + + gtk_widget_set_parent (child, GTK_WIDGET (paned)); + + if (GTK_WIDGET_REALIZED (child->parent)) + gtk_widget_realize (child); + + if (GTK_WIDGET_VISIBLE (child->parent) && GTK_WIDGET_VISIBLE (child)) + { + if (GTK_WIDGET_MAPPED (child->parent)) + gtk_widget_map (child); + + gtk_widget_queue_resize (child); + } + } +} + + +static void +e_paned_add (GtkContainer *container, + GtkWidget *widget) +{ + EPaned *paned; + + g_return_if_fail (container != NULL); + g_return_if_fail (E_IS_PANED (container)); + g_return_if_fail (widget != NULL); + + paned = E_PANED (container); + + if (!paned->child1) + e_paned_add1 (E_PANED (container), widget); + else if (!paned->child2) + e_paned_add2 (E_PANED (container), widget); +} + +static void +e_paned_remove (GtkContainer *container, + GtkWidget *widget) +{ + EPaned *paned; + gboolean was_visible; + + g_return_if_fail (container != NULL); + g_return_if_fail (E_IS_PANED (container)); + g_return_if_fail (widget != NULL); + + paned = E_PANED (container); + was_visible = GTK_WIDGET_VISIBLE (widget); + + if (paned->child1 == widget) + { + gtk_widget_unparent (widget); + + paned->child1 = NULL; + + if (was_visible && GTK_WIDGET_VISIBLE (container)) + gtk_widget_queue_resize (GTK_WIDGET (container)); + } + else if (paned->child2 == widget) + { + gtk_widget_unparent (widget); + + paned->child2 = NULL; + + if (was_visible && GTK_WIDGET_VISIBLE (container)) + gtk_widget_queue_resize (GTK_WIDGET (container)); + } +} + +static void +e_paned_forall (GtkContainer *container, + gboolean include_internals, + GtkCallback callback, + gpointer callback_data) +{ + EPaned *paned; + + g_return_if_fail (container != NULL); + g_return_if_fail (E_IS_PANED (container)); + g_return_if_fail (callback != NULL); + + paned = E_PANED (container); + + if (paned->child1) + (*callback) (paned->child1, callback_data); + if (paned->child2) + (*callback) (paned->child2, callback_data); +} + +gint +e_paned_get_position (EPaned *paned) +{ + g_return_val_if_fail (paned != NULL, 0); + g_return_val_if_fail (E_IS_PANED (paned), 0); + + return paned->child1_size; +} + +void +e_paned_set_position (EPaned *paned, + gint position) +{ + g_return_if_fail (paned != NULL); + g_return_if_fail (E_IS_PANED (paned)); + + if (position >= 0) + { + /* We don't clamp here - the assumption is that + * if the total allocation changes at the same time + * as the position, the position set is with reference + * to the new total size. If only the position changes, + * then clamping will occur in e_paned_compute_position() + */ + paned->child1_size = position; + paned->position_set = TRUE; + } + else + { + paned->position_set = FALSE; + } + + gtk_widget_queue_resize (GTK_WIDGET (paned)); +} + +void +e_paned_set_handle_size (EPaned *paned, + guint16 size) +{ + g_return_if_fail (paned != NULL); + g_return_if_fail (E_IS_PANED (paned)); + + gtk_widget_queue_resize (GTK_WIDGET (paned)); + + paned->handle_size = size; +} + +void +e_paned_compute_position(EPaned *paned, + gint allocation, + gint child1_req, + gint child2_req) +{ + g_return_if_fail (paned != NULL); + g_return_if_fail (E_IS_PANED (paned)); + + paned->min_position = paned->child1_shrink ? 0 : child1_req; + + paned->max_position = allocation; + if (!paned->child2_shrink) + paned->max_position = MAX (1, paned->max_position - child2_req); + + if (!paned->position_set) + { + if (paned->child1_resize && !paned->child2_resize) + paned->child1_size = MAX (1, allocation - child2_req); + else if (!paned->child1_resize && paned->child2_resize) + paned->child1_size = child1_req; + else if (child1_req + child2_req != 0) + paned->child1_size = allocation * ((gdouble)child1_req / (child1_req + child2_req)); + else + paned->child1_size = allocation * 0.5; + } + else + { + /* If the position was set before the initial allocation. + * (paned->last_allocation <= 0) just clamp it and leave it. + */ + if (paned->last_allocation > 0) + { + if (paned->child1_resize && !paned->child2_resize) + paned->child1_size += allocation - paned->last_allocation; + else if (!(!paned->child1_resize && paned->child2_resize)) + paned->child1_size = allocation * ((gdouble) paned->child1_size / (paned->last_allocation)); + } + } + + paned->child1_size = CLAMP (paned->child1_size, + paned->min_position, + paned->max_position); + + paned->last_allocation = allocation; +} |