Some infrastructure for scrolling. Based on epiphany extension.
Marco Pesenti Gritti
18 years ago
parent
f7a04ed3d3
commit
79c4bde2b4
@ -0,0 +1,195 @@
|
||||
/*
|
||||
* Copyright © 2002 Ricardo Fernádez Pascual
|
||||
* Copyright © 2005 Crispin Flowerday
|
||||
* Copyright © 2005 Christian Persch
|
||||
* Copyright © 2005 Samuel Abels
|
||||
* Copyright (C) 2006, Red Hat, Inc.
|
||||
*
|
||||
* 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, 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.
|
||||
*
|
||||
* $Id: ephy-push-scroller.c,v 1.6 2006/09/13 19:01:24 chpe Exp $
|
||||
*/
|
||||
|
||||
/* this file is based on work of Daniel Erat for galeon 1 */
|
||||
|
||||
#include "sugar-push-scroller.h"
|
||||
|
||||
#include <gtk/gtkimage.h>
|
||||
#include <gtk/gtkwindow.h>
|
||||
#include <gtk/gtkmain.h>
|
||||
|
||||
#include <stdlib.h>
|
||||
|
||||
#define SUGAR_PUSH_SCROLLER_GET_PRIVATE(object) (G_TYPE_INSTANCE_GET_PRIVATE ((object), SUGAR_TYPE_PUSH_SCROLLER, SugarPushScrollerPrivate))
|
||||
|
||||
struct _SugarPushScrollerPrivate
|
||||
{
|
||||
SugarBrowser *browser;
|
||||
GdkCursor *cursor;
|
||||
guint start_x;
|
||||
guint start_y;
|
||||
guint active : 1;
|
||||
};
|
||||
|
||||
G_DEFINE_TYPE(SugarPushScroller, sugar_push_scroller, G_TYPE_OBJECT)
|
||||
|
||||
/* private functions */
|
||||
|
||||
static gboolean
|
||||
sugar_push_scroller_motion_cb(GtkWidget *widget,
|
||||
GdkEventMotion *event,
|
||||
SugarPushScroller *scroller)
|
||||
{
|
||||
SugarPushScrollerPrivate *priv = scroller->priv;
|
||||
int x_dist, x_dist_abs, y_dist, y_dist_abs;
|
||||
|
||||
if (!priv->active) {
|
||||
return FALSE;
|
||||
}
|
||||
|
||||
/* get distance between last known cursor position and cursor */
|
||||
x_dist = priv->start_x - event->x_root;
|
||||
x_dist_abs = abs(x_dist);
|
||||
y_dist = priv->start_y - event->y_root;
|
||||
y_dist_abs = abs(y_dist);
|
||||
|
||||
/* scroll */
|
||||
sugar_browser_scroll_pixels(priv->browser, x_dist, y_dist);
|
||||
|
||||
priv->start_x = event->x_root;
|
||||
priv->start_y = event->y_root;
|
||||
|
||||
return TRUE;
|
||||
}
|
||||
|
||||
/* public functions */
|
||||
|
||||
void
|
||||
sugar_push_scroller_start (SugarPushScroller *scroller,
|
||||
SugarBrowser *browser,
|
||||
int x,
|
||||
int y)
|
||||
{
|
||||
SugarPushScrollerPrivate *priv = scroller->priv;
|
||||
GtkWidget *widget, *window;
|
||||
guint32 timestamp;
|
||||
|
||||
g_return_if_fail (browser != NULL);
|
||||
|
||||
if (priv->active)
|
||||
return;
|
||||
|
||||
if (gdk_pointer_is_grabbed ())
|
||||
return;
|
||||
|
||||
priv->active = TRUE;
|
||||
|
||||
/* FIXME is this good enough? */
|
||||
timestamp = gtk_get_current_event_time();
|
||||
|
||||
g_object_ref (scroller);
|
||||
|
||||
priv->browser = browser;
|
||||
|
||||
window = gtk_widget_get_toplevel(GTK_WIDGET(browser));
|
||||
g_object_ref (window);
|
||||
|
||||
/* set positions */
|
||||
priv->start_x = x;
|
||||
priv->start_y = y;
|
||||
|
||||
g_signal_connect(window, "motion-notify-event",
|
||||
G_CALLBACK (sugar_push_scroller_motion_cb), scroller);
|
||||
|
||||
/* grab the pointer */
|
||||
widget = GTK_WIDGET(window);
|
||||
gtk_grab_add(widget);
|
||||
if (gdk_pointer_grab(widget->window, FALSE,
|
||||
GDK_POINTER_MOTION_MASK |
|
||||
GDK_BUTTON_PRESS_MASK |
|
||||
GDK_BUTTON_RELEASE_MASK,
|
||||
NULL, priv->cursor, timestamp) != GDK_GRAB_SUCCESS) {
|
||||
sugar_push_scroller_stop(scroller, timestamp);
|
||||
return;
|
||||
}
|
||||
}
|
||||
|
||||
void
|
||||
sugar_push_scroller_stop (SugarPushScroller *scroller,
|
||||
guint32 timestamp)
|
||||
{
|
||||
SugarPushScrollerPrivate *priv = scroller->priv;
|
||||
GtkWidget *widget, *window;
|
||||
|
||||
if (priv->active == FALSE)
|
||||
return;
|
||||
|
||||
window = gtk_widget_get_toplevel(GTK_WIDGET(priv->browser));
|
||||
|
||||
/* disconnect the signals before ungrabbing! */
|
||||
g_signal_handlers_disconnect_matched (window,
|
||||
G_SIGNAL_MATCH_DATA, 0, 0,
|
||||
NULL, NULL, scroller);
|
||||
|
||||
/* ungrab the pointer if it's grabbed */
|
||||
if (gdk_pointer_is_grabbed())
|
||||
{
|
||||
gdk_pointer_ungrab(timestamp);
|
||||
}
|
||||
|
||||
gdk_keyboard_ungrab(timestamp);
|
||||
|
||||
widget = GTK_WIDGET(window);
|
||||
gtk_grab_remove(widget);
|
||||
|
||||
g_object_unref(window);
|
||||
|
||||
priv->browser = NULL;
|
||||
priv->active = FALSE;
|
||||
|
||||
g_object_unref(scroller);
|
||||
}
|
||||
|
||||
/* class implementation */
|
||||
|
||||
static void
|
||||
sugar_push_scroller_init (SugarPushScroller *scroller)
|
||||
{
|
||||
SugarPushScrollerPrivate *priv;
|
||||
priv = scroller->priv = SUGAR_PUSH_SCROLLER_GET_PRIVATE(scroller);
|
||||
priv->active = FALSE;
|
||||
priv->cursor = gdk_cursor_new(GDK_FLEUR);
|
||||
}
|
||||
|
||||
static void
|
||||
sugar_push_scroller_finalize (GObject *object)
|
||||
{
|
||||
SugarPushScroller *scroller = SUGAR_PUSH_SCROLLER(object);
|
||||
SugarPushScrollerPrivate *priv = scroller->priv;
|
||||
|
||||
gdk_cursor_unref(priv->cursor);
|
||||
|
||||
G_OBJECT_CLASS(sugar_push_scroller_parent_class)->finalize(object);
|
||||
}
|
||||
|
||||
static void
|
||||
sugar_push_scroller_class_init (SugarPushScrollerClass *klass)
|
||||
{
|
||||
GObjectClass *object_class = G_OBJECT_CLASS(klass);
|
||||
|
||||
object_class->finalize = sugar_push_scroller_finalize;
|
||||
|
||||
g_type_class_add_private(klass, sizeof (SugarPushScrollerPrivate));
|
||||
}
|
||||
@ -0,0 +1,66 @@
|
||||
/*
|
||||
* Copyright © 2002 Ricardo Fernádez Pascual
|
||||
* Copyright © 2005 Crispin Flowerday
|
||||
* Copyright © 2005 Christian Persch
|
||||
* Copyright (C) 2006, Red Hat, Inc.
|
||||
*
|
||||
* 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, 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.
|
||||
*
|
||||
* $Id: ephy-push-scroller.h,v 1.2 2006/09/13 19:01:24 chpe Exp $
|
||||
*/
|
||||
|
||||
#ifndef SUGAR_PUSH_SCROLLER_H
|
||||
#define SUGAR_PUSH_SCROLLER_H
|
||||
|
||||
#include <glib-object.h>
|
||||
#include <gtk/gtkwidget.h>
|
||||
|
||||
#include "sugar-browser.h"
|
||||
|
||||
G_BEGIN_DECLS
|
||||
|
||||
#define SUGAR_TYPE_PUSH_SCROLLER (sugar_push_scroller_get_type())
|
||||
#define SUGAR_PUSH_SCROLLER(object) (G_TYPE_CHECK_INSTANCE_CAST((object), SUGAR_TYPE_PUSH_SCROLLER, SugarPushScroller))
|
||||
#define SUGAR_PUSH_SCROLLER_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass), SUGAR_TYPE_PUSH_SCROLLER, SugarPushScrollerClass))
|
||||
#define SUGAR_IS_PUSH_SCROLLER(object) (G_TYPE_CHECK_INSTANCE_TYPE((object), SUGAR_TYPE_PUSH_SCROLLER))
|
||||
#define SUGAR_IS_PUSH_SCROLLER_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass), SUGAR_TYPE_PUSH_SCROLLER))
|
||||
#define SUGAR_PUSH_SCROLLER_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS((obj), SUGAR_TYPE_PUSH_SCROLLER, SugarPushScrollerClass))
|
||||
|
||||
typedef struct _SugarPushScrollerClass SugarPushScrollerClass;
|
||||
typedef struct _SugarPushScroller SugarPushScroller;
|
||||
typedef struct _SugarPushScrollerPrivate SugarPushScrollerPrivate;
|
||||
|
||||
struct _SugarPushScrollerClass {
|
||||
GObjectClass parent_class;
|
||||
};
|
||||
|
||||
struct _SugarPushScroller {
|
||||
GObject parent_object;
|
||||
|
||||
/*< private >*/
|
||||
SugarPushScrollerPrivate *priv;
|
||||
};
|
||||
|
||||
GType sugar_push_scroller_get_type (void);
|
||||
void sugar_push_scroller_start (SugarPushScroller *scroller,
|
||||
SugarBrowser *browser,
|
||||
int x,
|
||||
int y);
|
||||
void sugar_push_scroller_stop (SugarPushScroller *scroller,
|
||||
guint32 timestamp);
|
||||
|
||||
G_END_DECLS
|
||||
|
||||
#endif
|
||||
Loading…
Reference in New Issue