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/*
* Copyright (C) 2006-2007 Imendio AB
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or (at your option) any later version.
*
* 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
* General Public License for more details.
*
* You should have received a copy of the GNU General Public
* License along with this program; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*
* Authors: Kristian Rietveld <kris@imendio.com>
*/
/* To do:
* - should probably cancel animation if model changes
* - need to handle case where node-in-animation is removed
* - it only handles a single animation at a time; but I guess users
* aren't fast enough to trigger two or more animations at once anyway :P
* (could guard for this by just cancelling the "old" animation, and
* start the new one).
*/
#include <gtk/gtktreeview.h>
#include "gmcellrendererexpander.h"
#define GET_PRIV(obj) (G_TYPE_INSTANCE_GET_PRIVATE ((obj), GM_TYPE_CELL_RENDERER_EXPANDER, GmCellRendererExpanderPriv))
static void gm_cell_renderer_expander_init (GmCellRendererExpander *expander);
static void gm_cell_renderer_expander_class_init (GmCellRendererExpanderClass *klass);
static void gm_cell_renderer_expander_get_property (GObject *object,
guint param_id,
GValue *value,
GParamSpec *pspec);
static void gm_cell_renderer_expander_set_property (GObject *object,
guint param_id,
const GValue *value,
GParamSpec *pspec);
static void gm_cell_renderer_expander_finalize (GObject *object);
static void gm_cell_renderer_expander_get_size (GtkCellRenderer *cell,
GtkWidget *widget,
GdkRectangle *cell_area,
gint *x_offset,
gint *y_offset,
gint *width,
gint *height);
static void gm_cell_renderer_expander_render (GtkCellRenderer *cell,
GdkWindow *window,
GtkWidget *widget,
GdkRectangle *background_area,
GdkRectangle *cell_area,
GdkRectangle *expose_area,
GtkCellRendererState flags);
static gboolean gm_cell_renderer_expander_activate (GtkCellRenderer *cell,
GdkEvent *event,
GtkWidget *widget,
const gchar *path,
GdkRectangle *background_area,
GdkRectangle *cell_area,
GtkCellRendererState flags);
enum {
PROP_0,
PROP_EXPANDER_STYLE,
PROP_EXPANDER_SIZE,
PROP_ACTIVATABLE
};
typedef struct _GmCellRendererExpanderPriv GmCellRendererExpanderPriv;
struct _GmCellRendererExpanderPriv {
GtkExpanderStyle expander_style;
gint expander_size;
GtkTreeView *animation_view;
GtkTreeRowReference *animation_node;
GtkExpanderStyle animation_style;
guint animation_timeout;
GdkRectangle animation_area;
guint activatable : 1;
guint animation_expanding : 1;
};
G_DEFINE_TYPE (GmCellRendererExpander, gm_cell_renderer_expander, GTK_TYPE_CELL_RENDERER);
static void
gm_cell_renderer_expander_init (GmCellRendererExpander *expander)
{
GmCellRendererExpanderPriv *priv;
priv = GET_PRIV (expander);
priv->expander_style = GTK_EXPANDER_COLLAPSED;
priv->expander_size = 12;
priv->activatable = TRUE;
priv->animation_node = NULL;
GTK_CELL_RENDERER (expander)->xpad = 2;
GTK_CELL_RENDERER (expander)->ypad = 2;
GTK_CELL_RENDERER (expander)->mode = GTK_CELL_RENDERER_MODE_ACTIVATABLE;
}
static void
gm_cell_renderer_expander_class_init (GmCellRendererExpanderClass *klass)
{
GObjectClass *object_class;
GtkCellRendererClass *cell_class;
object_class = G_OBJECT_CLASS (klass);
cell_class = GTK_CELL_RENDERER_CLASS (klass);
object_class->finalize = gm_cell_renderer_expander_finalize;
object_class->get_property = gm_cell_renderer_expander_get_property;
object_class->set_property = gm_cell_renderer_expander_set_property;
cell_class->get_size = gm_cell_renderer_expander_get_size;
cell_class->render = gm_cell_renderer_expander_render;
cell_class->activate = gm_cell_renderer_expander_activate;
g_object_class_install_property (object_class,
PROP_EXPANDER_STYLE,
g_param_spec_enum ("expander-style",
"Expander Style",
"Style to use when painting the expander",
GTK_TYPE_EXPANDER_STYLE,
GTK_EXPANDER_COLLAPSED,
G_PARAM_READWRITE));
g_object_class_install_property (object_class,
PROP_EXPANDER_SIZE,
g_param_spec_int ("expander-size",
"Expander Size",
"The size of the expander",
0,
G_MAXINT,
12,
G_PARAM_READWRITE));
g_object_class_install_property (object_class,
PROP_ACTIVATABLE,
g_param_spec_boolean ("activatable",
"Activatable",
"The expander can be activated",
TRUE,
G_PARAM_READWRITE));
g_type_class_add_private (object_class, sizeof (GmCellRendererExpanderPriv));
}
static void
gm_cell_renderer_expander_get_property (GObject *object,
guint param_id,
GValue *value,
GParamSpec *pspec)
{
GmCellRendererExpander *expander;
GmCellRendererExpanderPriv *priv;
expander = GM_CELL_RENDERER_EXPANDER (object);
priv = GET_PRIV (expander);
switch (param_id) {
case PROP_EXPANDER_STYLE:
g_value_set_enum (value, priv->expander_style);
break;
case PROP_EXPANDER_SIZE:
g_value_set_int (value, priv->expander_size);
break;
case PROP_ACTIVATABLE:
g_value_set_boolean (value, priv->activatable);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
break;
}
}
static void
gm_cell_renderer_expander_set_property (GObject *object,
guint param_id,
const GValue *value,
GParamSpec *pspec)
{
GmCellRendererExpander *expander;
GmCellRendererExpanderPriv *priv;
expander = GM_CELL_RENDERER_EXPANDER (object);
priv = GET_PRIV (expander);
switch (param_id) {
case PROP_EXPANDER_STYLE:
priv->expander_style = g_value_get_enum (value);
break;
case PROP_EXPANDER_SIZE:
priv->expander_size = g_value_get_int (value);
break;
case PROP_ACTIVATABLE:
priv->activatable = g_value_get_boolean (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
break;
}
}
static void
gm_cell_renderer_expander_finalize (GObject *object)
{
GmCellRendererExpanderPriv *priv;
priv = GET_PRIV (object);
if (priv->animation_timeout) {
g_source_remove (priv->animation_timeout);
priv->animation_timeout = 0;
}
if (priv->animation_node) {
gtk_tree_row_reference_free (priv->animation_node);
}
(* G_OBJECT_CLASS (gm_cell_renderer_expander_parent_class)->finalize) (object);
}
GtkCellRenderer *
gm_cell_renderer_expander_new (void)
{
return g_object_new (GM_TYPE_CELL_RENDERER_EXPANDER, NULL);
}
static void
gm_cell_renderer_expander_get_size (GtkCellRenderer *cell,
G_GNUC_UNUSED GtkWidget *widget,
GdkRectangle *cell_area,
gint *x_offset,
gint *y_offset,
gint *width,
gint *height)
{
GmCellRendererExpander *expander;
GmCellRendererExpanderPriv *priv;
expander = (GmCellRendererExpander*) cell;
priv = GET_PRIV (expander);
if (cell_area) {
if (x_offset) {
*x_offset = cell->xalign * (cell_area->width - (priv->expander_size + (2 * cell->xpad)));
*x_offset = MAX (*x_offset, 0);
}
if (y_offset) {
*y_offset = cell->yalign * (cell_area->height - (priv->expander_size + (2 * cell->ypad)));
*y_offset = MAX (*y_offset, 0);
}
} else {
if (x_offset)
*x_offset = 0;
if (y_offset)
*y_offset = 0;
}
if (width)
*width = cell->xpad * 2 + priv->expander_size;
if (height)
*height = cell->ypad * 2 + priv->expander_size;
}
static void
gm_cell_renderer_expander_render (GtkCellRenderer *cell,
GdkWindow *window,
GtkWidget *widget,
GdkRectangle *background_area,
GdkRectangle *cell_area,
GdkRectangle *expose_area,
G_GNUC_UNUSED GtkCellRendererState flags)
{
GmCellRendererExpander *expander;
GmCellRendererExpanderPriv *priv;
GtkExpanderStyle expander_style;
gint x_offset, y_offset;
expander = (GmCellRendererExpander*) cell;
priv = GET_PRIV (expander);
if (priv->animation_node) {
GtkTreePath *path;
GdkRectangle rect;
/* Not sure if I like this ... */
path = gtk_tree_row_reference_get_path (priv->animation_node);
gtk_tree_view_get_background_area (priv->animation_view, path,
NULL, &rect);
gtk_tree_path_free (path);
if (background_area->y == rect.y)
expander_style = priv->animation_style;
else
expander_style = priv->expander_style;
} else
expander_style = priv->expander_style;
gm_cell_renderer_expander_get_size (cell, widget, cell_area,
&x_offset, &y_offset,
NULL, NULL);
gtk_paint_expander (widget->style,
window,
GTK_STATE_NORMAL,
expose_area,
widget,
"treeview",
cell_area->x + x_offset + cell->xpad + priv->expander_size / 2,
cell_area->y + y_offset + cell->ypad + priv->expander_size / 2,
expander_style);
gtk_paint_hline (widget->style, window, GTK_STATE_NORMAL, NULL, widget, NULL, 0,
widget->allocation.width, cell_area->y + cell_area->height);
}
static void
invalidate_node (GtkTreeView *tree_view,
GtkTreePath *path)
{
GdkWindow *bin_window;
GdkRectangle rect;
bin_window = gtk_tree_view_get_bin_window (tree_view);
gtk_tree_view_get_background_area (tree_view, path, NULL, &rect);
rect.x = 0;
rect.width = GTK_WIDGET (tree_view)->allocation.width;
gdk_window_invalidate_rect (bin_window, &rect, TRUE);
}
static gboolean
do_animation (GmCellRendererExpander *expander)
{
GmCellRendererExpanderPriv *priv;
GtkTreePath *path;
gboolean done = FALSE;
priv = GET_PRIV (expander);
if (priv->animation_expanding) {
if (priv->animation_style == GTK_EXPANDER_SEMI_COLLAPSED)
priv->animation_style = GTK_EXPANDER_SEMI_EXPANDED;
else if (priv->animation_style == GTK_EXPANDER_SEMI_EXPANDED) {
priv->animation_style = GTK_EXPANDER_EXPANDED;
done = TRUE;
}
} else {
if (priv->animation_style == GTK_EXPANDER_SEMI_EXPANDED)
priv->animation_style = GTK_EXPANDER_SEMI_COLLAPSED;
else if (priv->animation_style == GTK_EXPANDER_SEMI_COLLAPSED) {
priv->animation_style = GTK_EXPANDER_COLLAPSED;
done = TRUE;
}
}
path = gtk_tree_row_reference_get_path (priv->animation_node);
invalidate_node (priv->animation_view, path);
gtk_tree_path_free (path);
if (done) {
gtk_tree_row_reference_free (priv->animation_node);
priv->animation_node = NULL;
priv->animation_timeout = 0;
}
return !done;
}
static gboolean
animation_timeout (gpointer data)
{
gboolean retval;
GDK_THREADS_ENTER ();
retval = do_animation (data);
GDK_THREADS_LEAVE ();
return retval;
}
static void
gm_cell_renderer_expander_start_animation (GmCellRendererExpander *expander,
GtkTreeView *tree_view,
GtkTreePath *path,
gboolean expanding,
G_GNUC_UNUSED GdkRectangle *background_area)
{
GmCellRendererExpanderPriv *priv;
priv = GET_PRIV (expander);
if (expanding) {
priv->animation_style = GTK_EXPANDER_SEMI_COLLAPSED;
} else {
priv->animation_style = GTK_EXPANDER_SEMI_EXPANDED;
}
invalidate_node (tree_view, path);
priv->animation_expanding = expanding;
priv->animation_view = tree_view;
priv->animation_node = gtk_tree_row_reference_new (gtk_tree_view_get_model (tree_view), path);
priv->animation_timeout = g_timeout_add (50, animation_timeout, expander);
}
static gboolean
gm_cell_renderer_expander_activate (GtkCellRenderer *cell,
G_GNUC_UNUSED GdkEvent *event,
GtkWidget *widget,
const gchar *path_string,
GdkRectangle *background_area,
G_GNUC_UNUSED GdkRectangle *cell_area,
G_GNUC_UNUSED GtkCellRendererState flags)
{
GmCellRendererExpander *expander;
GmCellRendererExpanderPriv *priv;
GtkTreePath *path;
gboolean animate;
gboolean expanding;
expander = GM_CELL_RENDERER_EXPANDER (cell);
priv = GET_PRIV (cell);
if (!GTK_IS_TREE_VIEW (widget) || !priv->activatable)
return FALSE;
path = gtk_tree_path_new_from_string (path_string);
if (gtk_tree_path_get_depth (path) > 2) {
gtk_tree_path_free (path);
return TRUE;
}
g_object_get (gtk_widget_get_settings (GTK_WIDGET (widget)),
"gtk-enable-animations", &animate,
NULL);
if (gtk_tree_view_row_expanded (GTK_TREE_VIEW (widget), path)) {
gtk_tree_view_collapse_row (GTK_TREE_VIEW (widget), path);
expanding = FALSE;
} else {
gtk_tree_view_expand_row (GTK_TREE_VIEW (widget), path, FALSE);
expanding = TRUE;
}
if (animate) {
gm_cell_renderer_expander_start_animation (expander,
GTK_TREE_VIEW (widget),
path,
expanding,
background_area);
}
gtk_tree_path_free (path);
return TRUE;
}
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