static GType
gtk_mirror_bin_child_type (GtkContainer *container)
{
GtkMirrorBin *bin = GTK_MIRROR_BIN (container);
if (bin->child)
return G_TYPE_NONE;
return GTK_TYPE_WIDGET;
}
static void
gtk_mirror_bin_unrealize (GtkWidget *widget)
{
GtkMirrorBin *bin = GTK_MIRROR_BIN (widget);
gdk_window_set_user_data (bin->offscreen_window, NULL);
gdk_window_destroy (bin->offscreen_window);
bin->offscreen_window = NULL;
GTK_WIDGET_CLASS (gtk_mirror_bin_parent_class)->unrealize (widget);
}
static void
gtk_mirror_bin_forall (GtkContainer *container,
gboolean include_internals,
GtkCallback callback,
gpointer callback_data)
{
GtkMirrorBin *bin = GTK_MIRROR_BIN (container);
g_return_if_fail (callback != NULL);
if (bin->child)
(*callback) (bin->child, callback_data);
}
static void
gtk_mirror_bin_add (GtkContainer *container,
GtkWidget *widget)
{
GtkMirrorBin *bin = GTK_MIRROR_BIN (container);
if (!bin->child)
{
gtk_widget_set_parent_window (widget, bin->offscreen_window);
gtk_widget_set_parent (widget, GTK_WIDGET (bin));
bin->child = widget;
}
else
g_warning ("GtkMirrorBin cannot have more than one child\n");
}
static void
gtk_mirror_bin_size_request (GtkWidget *widget,
GtkRequisition *requisition)
{
GtkMirrorBin *bin = GTK_MIRROR_BIN (widget);
GtkRequisition child_requisition;
child_requisition.width = 0;
child_requisition.height = 0;
if (bin->child && gtk_widget_get_visible (bin->child))
gtk_widget_size_request (bin->child, &child_requisition);
requisition->width = GTK_CONTAINER (widget)->border_width * 2 + child_requisition.width + 10;
requisition->height = GTK_CONTAINER (widget)->border_width * 2 + child_requisition.height * 2 + 10;
}
static void
gtk_mirror_bin_remove (GtkContainer *container,
GtkWidget *widget)
{
GtkMirrorBin *bin = GTK_MIRROR_BIN (container);
gboolean was_visible;
was_visible = gtk_widget_get_visible (widget);
if (bin->child == widget)
{
gtk_widget_unparent (widget);
bin->child = NULL;
if (was_visible && gtk_widget_get_visible (GTK_WIDGET (container)))
gtk_widget_queue_resize (GTK_WIDGET (container));
}
}
static void
gtk_mirror_bin_size_allocate (GtkWidget *widget,
GtkAllocation *allocation)
{
GtkMirrorBin *bin = GTK_MIRROR_BIN (widget);
gint border_width;
gint w, h;
gtk_widget_set_allocation (widget, allocation);
border_width = gtk_container_get_border_width (GTK_CONTAINER (widget));
w = allocation->width - border_width * 2;
h = allocation->height - border_width * 2;
if (gtk_widget_get_realized (widget))
gdk_window_move_resize (gtk_widget_get_window (widget),
allocation->x + border_width,
allocation->y + border_width,
w, h);
if (bin->child && gtk_widget_get_visible (bin->child))
{
GtkRequisition child_requisition;
GtkAllocation child_allocation;
gtk_widget_get_child_requisition (bin->child, &child_requisition);
child_allocation.x = 0;
child_allocation.y = 0;
child_allocation.height = child_requisition.height;
child_allocation.width = child_requisition.width;
if (gtk_widget_get_realized (widget))
gdk_window_move_resize (bin->offscreen_window,
allocation->x + border_width,
allocation->y + border_width,
child_allocation.width, child_allocation.height);
gtk_widget_size_allocate (bin->child, &child_allocation);
}
}
static void
gtk_mirror_bin_size_allocate (GtkWidget *widget,
GtkAllocation *allocation)
{
GtkMirrorBin *bin = GTK_MIRROR_BIN (widget);
gint border_width;
gint w, h;
widget->allocation = *allocation;
border_width = GTK_CONTAINER (widget)->border_width;
w = allocation->width - border_width * 2;
h = allocation->height - border_width * 2;
if (GTK_WIDGET_REALIZED (widget))
gdk_window_move_resize (widget->window,
allocation->x + border_width,
allocation->y + border_width,
w, h);
if (bin->child && GTK_WIDGET_VISIBLE (bin->child))
{
GtkRequisition child_requisition;
GtkAllocation child_allocation;
gtk_widget_get_child_requisition (bin->child, &child_requisition);
child_allocation.x = 0;
child_allocation.y = 0;
child_allocation.height = child_requisition.height;
child_allocation.width = child_requisition.width;
if (GTK_WIDGET_REALIZED (widget))
gdk_window_move_resize (bin->offscreen_window,
allocation->x + border_width,
allocation->y + border_width,
child_allocation.width, child_allocation.height);
gtk_widget_size_allocate (bin->child, &child_allocation);
}
}
static gboolean
gtk_mirror_bin_expose (GtkWidget *widget,
GdkEventExpose *event)
{
GtkMirrorBin *bin = GTK_MIRROR_BIN (widget);
gint width, height;
if (gtk_widget_is_drawable (widget))
{
if (event->window == widget->window)
{
GdkPixmap *pixmap;
cairo_t *cr;
cairo_matrix_t matrix;
cairo_pattern_t *mask;
if (bin->child && gtk_widget_get_visible (bin->child))
{
pixmap = gdk_offscreen_window_get_pixmap (bin->offscreen_window);
gdk_drawable_get_size (pixmap, &width, &height);
cr = gdk_cairo_create (widget->window);
cairo_save (cr);
cairo_rectangle (cr, 0, 0, width, height);
cairo_clip (cr);
/* paint the offscreen child */
gdk_cairo_set_source_pixmap (cr, pixmap, 0, 0);
cairo_paint (cr);
cairo_restore (cr);
cairo_matrix_init (&matrix, 1.0, 0.0, 0.3, 1.0, 0.0, 0.0);
cairo_matrix_scale (&matrix, 1.0, -1.0);
cairo_matrix_translate (&matrix, -10, - 3 * height - 10);
cairo_transform (cr, &matrix);
cairo_rectangle (cr, 0, height, width, height);
cairo_clip (cr);
gdk_cairo_set_source_pixmap (cr, pixmap, 0, height);
/* create linear gradient as mask-pattern to fade out the source */
mask = cairo_pattern_create_linear (0.0, height, 0.0, 2*height);
cairo_pattern_add_color_stop_rgba (mask, 0.0, 0.0, 0.0, 0.0, 0.0);
cairo_pattern_add_color_stop_rgba (mask, 0.25, 0.0, 0.0, 0.0, 0.01);
cairo_pattern_add_color_stop_rgba (mask, 0.5, 0.0, 0.0, 0.0, 0.25);
cairo_pattern_add_color_stop_rgba (mask, 0.75, 0.0, 0.0, 0.0, 0.5);
cairo_pattern_add_color_stop_rgba (mask, 1.0, 0.0, 0.0, 0.0, 1.0);
/* paint the reflection */
cairo_mask (cr, mask);
cairo_pattern_destroy (mask);
cairo_destroy (cr);
}
}
else if (event->window == bin->offscreen_window)
{
gtk_paint_flat_box (widget->style, event->window,
GTK_STATE_NORMAL, GTK_SHADOW_NONE,
&event->area, widget, "blah",
0, 0, -1, -1);
if (bin->child)
gtk_container_propagate_expose (GTK_CONTAINER (widget),
bin->child,
event);
}
}
return FALSE;
}
static void
gtk_mirror_bin_realize (GtkWidget *widget)
{
GtkMirrorBin *bin = GTK_MIRROR_BIN (widget);
GdkWindowAttr attributes;
gint attributes_mask;
gint border_width;
GtkRequisition child_requisition;
gtk_widget_set_realized (widget, TRUE);
border_width = GTK_CONTAINER (widget)->border_width;
attributes.x = widget->allocation.x + border_width;
attributes.y = widget->allocation.y + border_width;
attributes.width = widget->allocation.width - 2 * border_width;
attributes.height = widget->allocation.height - 2 * border_width;
attributes.window_type = GDK_WINDOW_CHILD;
attributes.event_mask = gtk_widget_get_events (widget)
| GDK_EXPOSURE_MASK
| GDK_POINTER_MOTION_MASK
| GDK_BUTTON_PRESS_MASK
| GDK_BUTTON_RELEASE_MASK
| GDK_SCROLL_MASK
| GDK_ENTER_NOTIFY_MASK
| GDK_LEAVE_NOTIFY_MASK;
attributes.visual = gtk_widget_get_visual (widget);
attributes.colormap = gtk_widget_get_colormap (widget);
attributes.wclass = GDK_INPUT_OUTPUT;
attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
widget->window = gdk_window_new (gtk_widget_get_parent_window (widget),
&attributes, attributes_mask);
gdk_window_set_user_data (widget->window, widget);
g_signal_connect (widget->window, "pick-embedded-child",
G_CALLBACK (pick_offscreen_child), bin);
attributes.window_type = GDK_WINDOW_OFFSCREEN;
child_requisition.width = child_requisition.height = 0;
if (bin->child && gtk_widget_get_visible (bin->child))
{
attributes.width = bin->child->allocation.width;
attributes.height = bin->child->allocation.height;
}
bin->offscreen_window = gdk_window_new (gtk_widget_get_root_window (widget),
&attributes, attributes_mask);
gdk_window_set_user_data (bin->offscreen_window, widget);
if (bin->child)
gtk_widget_set_parent_window (bin->child, bin->offscreen_window);
gdk_offscreen_window_set_embedder (bin->offscreen_window, widget->window);
g_signal_connect (bin->offscreen_window, "to-embedder",
G_CALLBACK (offscreen_window_to_parent), bin);
g_signal_connect (bin->offscreen_window, "from-embedder",
G_CALLBACK (offscreen_window_from_parent), bin);
widget->style = gtk_style_attach (widget->style, widget->window);
gtk_style_set_background (widget->style, widget->window, GTK_STATE_NORMAL);
gtk_style_set_background (widget->style, bin->offscreen_window, GTK_STATE_NORMAL);
gdk_window_show (bin->offscreen_window);
}
