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-rw-r--r--e-util/e-paned.c503
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diff --git a/e-util/e-paned.c b/e-util/e-paned.c
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+/*
+ * e-paned.c
+ *
+ * This program 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) version 3.
+ *
+ * This program 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 the program; if not, see <http://www.gnu.org/licenses/>
+ *
+ *
+ * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
+ *
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include "e-paned.h"
+
+#include <glib/gi18n-lib.h>
+
+#define E_PANED_GET_PRIVATE(obj) \
+ (G_TYPE_INSTANCE_GET_PRIVATE \
+ ((obj), E_TYPE_PANED, EPanedPrivate))
+
+#define SYNC_REQUEST_NONE 0
+#define SYNC_REQUEST_POSITION 1
+#define SYNC_REQUEST_PROPORTION 2
+
+struct _EPanedPrivate {
+ gint hposition;
+ gint vposition;
+ gdouble proportion;
+
+ gulong wse_handler_id;
+
+ guint fixed_resize : 1;
+ guint sync_request : 2;
+ guint toplevel_ready : 1;
+};
+
+enum {
+ PROP_0,
+ PROP_HPOSITION,
+ PROP_VPOSITION,
+ PROP_PROPORTION,
+ PROP_FIXED_RESIZE
+};
+
+G_DEFINE_TYPE (
+ EPaned,
+ e_paned,
+ GTK_TYPE_PANED)
+
+static gboolean
+paned_queue_resize_on_idle (GtkWidget *paned)
+{
+ gtk_widget_queue_resize_no_redraw (paned);
+
+ return FALSE;
+}
+
+static gboolean
+paned_window_state_event_cb (EPaned *paned,
+ GdkEventWindowState *event,
+ GtkWidget *toplevel)
+{
+ /* Wait for WITHDRAWN to change from 1 to 0. */
+ if (!(event->changed_mask & GDK_WINDOW_STATE_WITHDRAWN))
+ return FALSE;
+
+ /* The whole point of this hack is to trap a point where if
+ * the window were to be maximized initially, the maximized
+ * allocation would already be negotiated. We're there now.
+ * Set a flag so we know it's safe to set GtkPaned position. */
+ paned->priv->toplevel_ready = TRUE;
+
+ if (paned->priv->sync_request != SYNC_REQUEST_NONE)
+ gtk_widget_queue_resize (GTK_WIDGET (paned));
+
+ /* We don't need to listen for window state events anymore. */
+ g_signal_handler_disconnect (toplevel, paned->priv->wse_handler_id);
+ paned->priv->wse_handler_id = 0;
+
+ return FALSE;
+}
+
+static void
+paned_notify_orientation_cb (EPaned *paned)
+{
+ /* Ignore the next "notify::position" emission. */
+ if (e_paned_get_fixed_resize (paned))
+ paned->priv->sync_request = SYNC_REQUEST_POSITION;
+ else
+ paned->priv->sync_request = SYNC_REQUEST_PROPORTION;
+ gtk_widget_queue_resize (GTK_WIDGET (paned));
+}
+
+static void
+paned_notify_position_cb (EPaned *paned)
+{
+ GtkAllocation allocation;
+ GtkOrientable *orientable;
+ GtkOrientation orientation;
+ gdouble proportion;
+ gint position;
+
+ /* If a sync has already been requested, do nothing. */
+ if (paned->priv->sync_request != SYNC_REQUEST_NONE)
+ return;
+
+ orientable = GTK_ORIENTABLE (paned);
+ orientation = gtk_orientable_get_orientation (orientable);
+
+ gtk_widget_get_allocation (GTK_WIDGET (paned), &allocation);
+ position = gtk_paned_get_position (GTK_PANED (paned));
+
+ g_object_freeze_notify (G_OBJECT (paned));
+
+ if (orientation == GTK_ORIENTATION_HORIZONTAL) {
+ position = MAX (0, allocation.width - position);
+ proportion = (gdouble) position / allocation.width;
+
+ paned->priv->hposition = position;
+ g_object_notify (G_OBJECT (paned), "hposition");
+ } else {
+ position = MAX (0, allocation.height - position);
+ proportion = (gdouble) position / allocation.height;
+
+ paned->priv->vposition = position;
+ g_object_notify (G_OBJECT (paned), "vposition");
+ }
+
+ paned->priv->proportion = proportion;
+ g_object_notify (G_OBJECT (paned), "proportion");
+
+ if (e_paned_get_fixed_resize (paned))
+ paned->priv->sync_request = SYNC_REQUEST_POSITION;
+ else
+ paned->priv->sync_request = SYNC_REQUEST_PROPORTION;
+
+ g_object_thaw_notify (G_OBJECT (paned));
+}
+
+static void
+paned_set_property (GObject *object,
+ guint property_id,
+ const GValue *value,
+ GParamSpec *pspec)
+{
+ switch (property_id) {
+ case PROP_HPOSITION:
+ e_paned_set_hposition (
+ E_PANED (object),
+ g_value_get_int (value));
+ return;
+
+ case PROP_VPOSITION:
+ e_paned_set_vposition (
+ E_PANED (object),
+ g_value_get_int (value));
+ return;
+
+ case PROP_PROPORTION:
+ e_paned_set_proportion (
+ E_PANED (object),
+ g_value_get_double (value));
+ return;
+
+ case PROP_FIXED_RESIZE:
+ e_paned_set_fixed_resize (
+ E_PANED (object),
+ g_value_get_boolean (value));
+ return;
+ }
+
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+}
+
+static void
+paned_get_property (GObject *object,
+ guint property_id,
+ GValue *value,
+ GParamSpec *pspec)
+{
+ switch (property_id) {
+ case PROP_HPOSITION:
+ g_value_set_int (
+ value, e_paned_get_hposition (
+ E_PANED (object)));
+ return;
+
+ case PROP_VPOSITION:
+ g_value_set_int (
+ value, e_paned_get_vposition (
+ E_PANED (object)));
+ return;
+
+ case PROP_PROPORTION:
+ g_value_set_double (
+ value, e_paned_get_proportion (
+ E_PANED (object)));
+ return;
+
+ case PROP_FIXED_RESIZE:
+ g_value_set_boolean (
+ value, e_paned_get_fixed_resize (
+ E_PANED (object)));
+ return;
+ }
+
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+}
+
+static void
+paned_realize (GtkWidget *widget)
+{
+ EPanedPrivate *priv;
+ GtkWidget *toplevel;
+ GdkWindowState state;
+ GdkWindow *window;
+
+ priv = E_PANED_GET_PRIVATE (widget);
+
+ /* Chain up to parent's realize() method. */
+ GTK_WIDGET_CLASS (e_paned_parent_class)->realize (widget);
+
+ /* XXX This would be easier if we could be notified of
+ * window state events directly, but I can't seem
+ * to make that happen. */
+
+ toplevel = gtk_widget_get_toplevel (widget);
+ window = gtk_widget_get_window (toplevel);
+ state = gdk_window_get_state (window);
+
+ /* If the window is withdrawn, wait for it to be shown before
+ * setting the pane position. If the window is already shown,
+ * it's safe to set the pane position immediately. */
+ if (state & GDK_WINDOW_STATE_WITHDRAWN)
+ priv->wse_handler_id = g_signal_connect_swapped (
+ toplevel, "window-state-event",
+ G_CALLBACK (paned_window_state_event_cb), widget);
+ else
+ priv->toplevel_ready = TRUE;
+}
+
+static void
+paned_size_allocate (GtkWidget *widget,
+ GtkAllocation *allocation)
+{
+ EPaned *paned = E_PANED (widget);
+ GtkOrientable *orientable;
+ GtkOrientation orientation;
+ gdouble proportion;
+ gint allocated;
+ gint position;
+
+ /* Chain up to parent's size_allocate() method. */
+ GTK_WIDGET_CLASS (e_paned_parent_class)->
+ size_allocate (widget, allocation);
+
+ if (!paned->priv->toplevel_ready)
+ return;
+
+ if (paned->priv->sync_request == SYNC_REQUEST_NONE)
+ return;
+
+ orientable = GTK_ORIENTABLE (paned);
+ orientation = gtk_orientable_get_orientation (orientable);
+
+ if (orientation == GTK_ORIENTATION_HORIZONTAL) {
+ allocated = allocation->width;
+ position = e_paned_get_hposition (paned);
+ } else {
+ allocated = allocation->height;
+ position = e_paned_get_vposition (paned);
+ }
+
+ proportion = e_paned_get_proportion (paned);
+
+ if (paned->priv->sync_request == SYNC_REQUEST_POSITION)
+ position = MAX (0, allocated - position);
+ else
+ position = (1.0 - proportion) * allocated;
+
+ gtk_paned_set_position (GTK_PANED (paned), position);
+
+ paned->priv->sync_request = SYNC_REQUEST_NONE;
+
+ /* gtk_paned_set_position() calls queue_resize, which cannot
+ * be called from size_allocate, so schedule it from an idle
+ * callback so the change takes effect. */
+ g_idle_add_full (
+ G_PRIORITY_DEFAULT_IDLE,
+ (GSourceFunc) paned_queue_resize_on_idle,
+ g_object_ref (paned),
+ (GDestroyNotify) g_object_unref);
+}
+
+static void
+e_paned_class_init (EPanedClass *class)
+{
+ GObjectClass *object_class;
+ GtkWidgetClass *widget_class;
+
+ g_type_class_add_private (class, sizeof (EPanedPrivate));
+
+ object_class = G_OBJECT_CLASS (class);
+ object_class->set_property = paned_set_property;
+ object_class->get_property = paned_get_property;
+
+ widget_class = GTK_WIDGET_CLASS (class);
+ widget_class->realize = paned_realize;
+ widget_class->size_allocate = paned_size_allocate;
+
+ g_object_class_install_property (
+ object_class,
+ PROP_HPOSITION,
+ g_param_spec_int (
+ "hposition",
+ "Horizontal Position",
+ "Pane position when oriented horizontally",
+ G_MININT,
+ G_MAXINT,
+ 0,
+ G_PARAM_READWRITE));
+
+ g_object_class_install_property (
+ object_class,
+ PROP_VPOSITION,
+ g_param_spec_int (
+ "vposition",
+ "Vertical Position",
+ "Pane position when oriented vertically",
+ G_MININT,
+ G_MAXINT,
+ 0,
+ G_PARAM_READWRITE));
+
+ g_object_class_install_property (
+ object_class,
+ PROP_PROPORTION,
+ g_param_spec_double (
+ "proportion",
+ "Proportion",
+ "Proportion of the 2nd pane size",
+ 0.0,
+ 1.0,
+ 0.0,
+ G_PARAM_READWRITE));
+
+ g_object_class_install_property (
+ object_class,
+ PROP_FIXED_RESIZE,
+ g_param_spec_boolean (
+ "fixed-resize",
+ "Fixed Resize",
+ "Keep the 2nd pane fixed during resize",
+ TRUE,
+ G_PARAM_READWRITE));
+}
+
+static void
+e_paned_init (EPaned *paned)
+{
+ paned->priv = E_PANED_GET_PRIVATE (paned);
+
+ paned->priv->proportion = 0.5;
+ paned->priv->fixed_resize = TRUE;
+
+ g_signal_connect (
+ paned, "notify::orientation",
+ G_CALLBACK (paned_notify_orientation_cb), NULL);
+
+ g_signal_connect (
+ paned, "notify::position",
+ G_CALLBACK (paned_notify_position_cb), NULL);
+}
+
+GtkWidget *
+e_paned_new (GtkOrientation orientation)
+{
+ return g_object_new (E_TYPE_PANED, "orientation", orientation, NULL);
+}
+
+gint
+e_paned_get_hposition (EPaned *paned)
+{
+ g_return_val_if_fail (E_IS_PANED (paned), 0);
+
+ return paned->priv->hposition;
+}
+
+void
+e_paned_set_hposition (EPaned *paned,
+ gint hposition)
+{
+ GtkOrientable *orientable;
+ GtkOrientation orientation;
+
+ g_return_if_fail (E_IS_PANED (paned));
+
+ if (hposition == paned->priv->hposition)
+ return;
+
+ paned->priv->hposition = hposition;
+
+ g_object_notify (G_OBJECT (paned), "hposition");
+
+ orientable = GTK_ORIENTABLE (paned);
+ orientation = gtk_orientable_get_orientation (orientable);
+
+ if (orientation == GTK_ORIENTATION_HORIZONTAL) {
+ paned->priv->sync_request = SYNC_REQUEST_POSITION;
+ gtk_widget_queue_resize (GTK_WIDGET (paned));
+ }
+}
+
+gint
+e_paned_get_vposition (EPaned *paned)
+{
+ g_return_val_if_fail (E_IS_PANED (paned), 0);
+
+ return paned->priv->vposition;
+}
+
+void
+e_paned_set_vposition (EPaned *paned,
+ gint vposition)
+{
+ GtkOrientable *orientable;
+ GtkOrientation orientation;
+
+ g_return_if_fail (E_IS_PANED (paned));
+
+ if (vposition == paned->priv->vposition)
+ return;
+
+ paned->priv->vposition = vposition;
+
+ g_object_notify (G_OBJECT (paned), "vposition");
+
+ orientable = GTK_ORIENTABLE (paned);
+ orientation = gtk_orientable_get_orientation (orientable);
+
+ if (orientation == GTK_ORIENTATION_VERTICAL) {
+ paned->priv->sync_request = SYNC_REQUEST_POSITION;
+ gtk_widget_queue_resize (GTK_WIDGET (paned));
+ }
+}
+
+gdouble
+e_paned_get_proportion (EPaned *paned)
+{
+ g_return_val_if_fail (E_IS_PANED (paned), 0.5);
+
+ return paned->priv->proportion;
+}
+
+void
+e_paned_set_proportion (EPaned *paned,
+ gdouble proportion)
+{
+ g_return_if_fail (E_IS_PANED (paned));
+ g_return_if_fail (CLAMP (proportion, 0.0, 1.0) == proportion);
+
+ paned->priv->proportion = proportion;
+
+ paned->priv->sync_request = SYNC_REQUEST_PROPORTION;
+ gtk_widget_queue_resize (GTK_WIDGET (paned));
+
+ g_object_notify (G_OBJECT (paned), "proportion");
+}
+
+gboolean
+e_paned_get_fixed_resize (EPaned *paned)
+{
+ g_return_val_if_fail (E_IS_PANED (paned), FALSE);
+
+ return paned->priv->fixed_resize;
+}
+
+void
+e_paned_set_fixed_resize (EPaned *paned,
+ gboolean fixed_resize)
+{
+ g_return_if_fail (E_IS_PANED (paned));
+
+ if (fixed_resize == paned->priv->fixed_resize)
+ return;
+
+ paned->priv->fixed_resize = fixed_resize;
+
+ g_object_notify (G_OBJECT (paned), "fixed-resize");
+}