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/*
* Copyright (C) 2011 Igalia S.L.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "DragIcon.h"
#include <gtk/gtk.h>
namespace WebCore {
#ifdef GTK_API_VERSION_2
static gboolean dragIconWindowDrawEventCallback(GtkWidget*, GdkEventExpose* event, DragIcon* icon)
{
RefPtr<cairo_t> context = adoptRef(gdk_cairo_create(event->window));
icon->draw(context.get());
return TRUE;
}
#else
static gboolean dragIconWindowDrawEventCallback(GtkWidget*, cairo_t* context, DragIcon* icon)
{
if (!gdk_cairo_get_clip_rectangle(context, 0))
return FALSE;
icon->draw(context);
return TRUE;
}
#endif // GTK_API_VERSION_2
DragIcon::DragIcon()
: m_window(gtk_window_new(GTK_WINDOW_POPUP))
{
#ifdef GTK_API_VERSION_2
g_signal_connect(m_window, "expose-event", G_CALLBACK(dragIconWindowDrawEventCallback), this);
#else
g_signal_connect(m_window, "draw", G_CALLBACK(dragIconWindowDrawEventCallback), this);
#endif
// This strategy originally comes from Chromium: src/chrome/browser/gtk/tab_contents_drag_source.cc
GdkScreen* screen = gtk_widget_get_screen(m_window);
#ifdef GTK_API_VERSION_2
GdkColormap* rgba = gdk_screen_get_rgba_colormap(screen);
if (rgba)
gtk_widget_set_colormap(m_window, rgba);
#else
GdkVisual* visual = gdk_screen_get_rgba_visual(screen);
if (!visual)
visual = gdk_screen_get_system_visual(screen);
gtk_widget_set_visual(m_window, visual);
#endif // GTK_API_VERSION_2
}
DragIcon::~DragIcon()
{
gtk_widget_destroy(m_window);
}
void DragIcon::draw(cairo_t* context)
{
cairo_rectangle(context, 0, 0,
cairo_image_surface_get_width(m_image.get()),
cairo_image_surface_get_height(m_image.get()));
cairo_set_operator(context, CAIRO_OPERATOR_SOURCE);
cairo_set_source_surface(context, m_image.get(), 0, 0);
cairo_fill(context);
}
void DragIcon::setImage(cairo_surface_t* image)
{
ASSERT(image);
m_image = image;
m_imageSize = IntSize(cairo_image_surface_get_width(image), cairo_image_surface_get_height(image));
gtk_window_resize(GTK_WINDOW(m_window), m_imageSize.width(), m_imageSize.height());
}
void DragIcon::useForDrag(GdkDragContext* context)
{
IntPoint hotspot(m_imageSize);
hotspot.scale(0.5, 0.5);
useForDrag(context, hotspot);
}
void DragIcon::useForDrag(GdkDragContext* context, const IntPoint& hotspot)
{
gtk_drag_set_icon_widget(context, m_window, hotspot.x(), hotspot.y());
}
} // namespace WebCore
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