1 files changed, 503 insertions, 0 deletions
diff --git a/e-util/e-paned.c b/e-util/e-paned.c
new file mode 100644
index 0000000000..3b8f16bbec
--- /dev/null
+++ b/e-util/e-paned.c
@@ -0,0 +1,503 @@
+/*
+ * 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+	/* Wait for WITHDRAWN to change from 1 to 0.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");
+}