static void
cvImageWidget_realize (GtkWidget *widget)
{
CvImageWidget *image_widget;
GdkWindowAttr attributes;
gint attributes_mask;
//printf("cvImageWidget_realize\n");
g_return_if_fail (widget != NULL);
g_return_if_fail (CV_IS_IMAGE_WIDGET (widget));
GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
image_widget = CV_IMAGE_WIDGET (widget);
attributes.x = widget->allocation.x;
attributes.y = widget->allocation.y;
attributes.width = widget->allocation.width;
attributes.height = widget->allocation.height;
attributes.wclass = GDK_INPUT_OUTPUT;
attributes.window_type = GDK_WINDOW_CHILD;
attributes.event_mask = gtk_widget_get_events (widget) |
GDK_EXPOSURE_MASK | GDK_BUTTON_PRESS_MASK |
GDK_BUTTON_RELEASE_MASK | GDK_POINTER_MOTION_MASK;
attributes.visual = gtk_widget_get_visual (widget);
attributes.colormap = gtk_widget_get_colormap (widget);
attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
widget->window = gdk_window_new (widget->parent->window, &attributes, attributes_mask);
widget->style = gtk_style_attach (widget->style, widget->window);
gdk_window_set_user_data (widget->window, widget);
gtk_style_set_background (widget->style, widget->window, GTK_STATE_ACTIVE);
}
static gboolean cvImageWidget_expose(GtkWidget* widget, GdkEventExpose* event, gpointer data)
{
#ifdef HAVE_OPENGL
CvWindow* window = (CvWindow*)data;
if (window->useGl)
{
drawGl(window);
return TRUE;
}
#else
(void)data;
#endif
CvImageWidget *image_widget = NULL;
cairo_t *cr = NULL;
GdkPixbuf *pixbuf = NULL;
g_return_val_if_fail (widget != NULL, FALSE);
g_return_val_if_fail (CV_IS_IMAGE_WIDGET (widget), FALSE);
g_return_val_if_fail (event != NULL, FALSE);
if (event->count > 0)
return FALSE;
cr = gdk_cairo_create(widget->window);
image_widget = CV_IMAGE_WIDGET (widget);
if( image_widget->scaled_image ){
// center image in available region
int x0 = (widget->allocation.width - image_widget->scaled_image->cols)/2;
int y0 = (widget->allocation.height - image_widget->scaled_image->rows)/2;
pixbuf = gdk_pixbuf_new_from_data(image_widget->scaled_image->data.ptr, GDK_COLORSPACE_RGB, false,
8, MIN(image_widget->scaled_image->cols, widget->allocation.width),
MIN(image_widget->scaled_image->rows, widget->allocation.height),
image_widget->scaled_image->step, NULL, NULL);
gdk_cairo_set_source_pixbuf(cr, pixbuf, x0, y0);
}
else if( image_widget->original_image ){
pixbuf = gdk_pixbuf_new_from_data(image_widget->original_image->data.ptr, GDK_COLORSPACE_RGB, false,
8, MIN(image_widget->original_image->cols, widget->allocation.width),
MIN(image_widget->original_image->rows, widget->allocation.height),
image_widget->original_image->step, NULL, NULL);
gdk_cairo_set_source_pixbuf(cr, pixbuf, 0, 0);
}
cairo_paint(cr);
g_object_unref(pixbuf);
cairo_destroy(cr);
return TRUE;
}
static void
cvImageWidget_size_allocate (GtkWidget *widget,
GtkAllocation *allocation)
{
CvImageWidget *image_widget;
//printf("cvImageWidget_size_allocate\n");
g_return_if_fail (widget != NULL);
g_return_if_fail (CV_IS_IMAGE_WIDGET (widget));
g_return_if_fail (allocation != NULL);
widget->allocation = *allocation;
image_widget = CV_IMAGE_WIDGET (widget);
if( (image_widget->flags & CV_WINDOW_AUTOSIZE)==0 && image_widget->original_image ){
// (re) allocated scaled image
if( image_widget->flags & CV_WINDOW_NO_IMAGE ){
cvImageWidget_set_size( widget, image_widget->original_image->cols,
image_widget->original_image->rows);
}
else{
cvImageWidget_set_size( widget, allocation->width, allocation->height );
}
cvResize( image_widget->original_image, image_widget->scaled_image, CV_INTER_AREA );
}
if (GTK_WIDGET_REALIZED (widget))
{
image_widget = CV_IMAGE_WIDGET (widget);
if( image_widget->original_image &&
((image_widget->flags & CV_WINDOW_AUTOSIZE) ||
(image_widget->flags & CV_WINDOW_NO_IMAGE)) )
{
widget->allocation.width = image_widget->original_image->cols;
widget->allocation.height = image_widget->original_image->rows;
gdk_window_move_resize( widget->window, allocation->x, allocation->y,
image_widget->original_image->cols, image_widget->original_image->rows );
if(image_widget->flags & CV_WINDOW_NO_IMAGE){
image_widget->flags &= ~CV_WINDOW_NO_IMAGE;
gtk_widget_queue_resize( GTK_WIDGET(widget) );
}
}
else{
gdk_window_move_resize (widget->window,
allocation->x, allocation->y,
allocation->width, allocation->height );
}
}
}
static gboolean cvImageWidget_expose(GtkWidget* widget, GdkEventExpose* event, gpointer data)
{
#ifdef HAVE_OPENGL
CvWindow* window = (CvWindow*)data;
if (window->useGl)
{
drawGl(window);
return TRUE;
}
#else
(void)data;
#endif
CvImageWidget *image_widget;
g_return_val_if_fail (widget != NULL, FALSE);
g_return_val_if_fail (CV_IS_IMAGE_WIDGET (widget), FALSE);
g_return_val_if_fail (event != NULL, FALSE);
if (event->count > 0)
return FALSE;
image_widget = CV_IMAGE_WIDGET (widget);
gdk_window_clear_area (widget->window,
0, 0,
widget->allocation.width,
widget->allocation.height);
if( image_widget->scaled_image ){
// center image in available region
int x0 = (widget->allocation.width - image_widget->scaled_image->cols)/2;
int y0 = (widget->allocation.height - image_widget->scaled_image->rows)/2;
gdk_draw_rgb_image( widget->window, widget->style->fg_gc[GTK_STATE_NORMAL],
x0, y0, MIN(image_widget->scaled_image->cols, widget->allocation.width),
MIN(image_widget->scaled_image->rows, widget->allocation.height),
GDK_RGB_DITHER_MAX, image_widget->scaled_image->data.ptr, image_widget->scaled_image->step );
}
else if( image_widget->original_image ){
gdk_draw_rgb_image( widget->window, widget->style->fg_gc[GTK_STATE_NORMAL],
0, 0,
MIN(image_widget->original_image->cols, widget->allocation.width),
MIN(image_widget->original_image->rows, widget->allocation.height),
GDK_RGB_DITHER_MAX, image_widget->original_image->data.ptr, image_widget->original_image->step );
}
return TRUE;
}
static void
cvImageWidget_destroy (GtkObject *object)
{
CvImageWidget *image_widget;
g_return_if_fail (object != NULL);
g_return_if_fail (CV_IS_IMAGE_WIDGET (object));
image_widget = CV_IMAGE_WIDGET (object);
cvReleaseMat( &image_widget->scaled_image );
cvReleaseMat( &image_widget->original_image );
if (GTK_OBJECT_CLASS (parent_class)->destroy)
(* GTK_OBJECT_CLASS (parent_class)->destroy) (object);
}
static void
cvImageWidget_destroy (GtkObject *object)
#endif //GTK_VERSION3
{
CvImageWidget *image_widget;
g_return_if_fail (object != NULL);
g_return_if_fail (CV_IS_IMAGE_WIDGET (object));
image_widget = CV_IMAGE_WIDGET (object);
cvReleaseMat( &image_widget->scaled_image );
cvReleaseMat( &image_widget->original_image );
#if defined (GTK_VERSION3)
if (GTK_WIDGET_CLASS (parent_class)->destroy)
(* GTK_WIDGET_CLASS (parent_class)->destroy) (object);
#else
if (GTK_OBJECT_CLASS (parent_class)->destroy)
(* GTK_OBJECT_CLASS (parent_class)->destroy) (object);
#endif //GTK_VERSION3
}
static void
cvImageWidget_get_preferred_height (GtkWidget *widget, gint *minimal_height, gint *natural_height)
{
g_return_if_fail (widget != NULL);
g_return_if_fail (CV_IS_IMAGE_WIDGET (widget));
CvImageWidget * image_widget = CV_IMAGE_WIDGET( widget );
if(image_widget->original_image != NULL) {
*minimal_height = image_widget->flags & CV_WINDOW_AUTOSIZE ?
gdk_window_get_height(gtk_widget_get_window(widget)) : image_widget->original_image->rows;
}
else {
*minimal_height = 240;
}
if(image_widget->scaled_image != NULL) {
*natural_height = *minimal_height < image_widget->scaled_image->rows ?
image_widget->scaled_image->cols : *minimal_height;
}
else {
*natural_height = *minimal_height;
}
}
static void
cvImageWidget_realize (GtkWidget *widget)
{
GdkWindowAttr attributes;
gint attributes_mask;
#if defined(GTK_VERSION3)
GtkAllocation allocation;
gtk_widget_get_allocation(widget, &allocation);
#endif //GTK_VERSION3
//printf("cvImageWidget_realize\n");
g_return_if_fail (widget != NULL);
g_return_if_fail (CV_IS_IMAGE_WIDGET (widget));
gtk_widget_set_realized(widget, TRUE);
#if defined(GTK_VERSION3)
attributes.x = allocation.x;
attributes.y = allocation.y;
attributes.width = allocation.width;
attributes.height = allocation.height;
#else
attributes.x = widget->allocation.x;
attributes.y = widget->allocation.y;
attributes.width = widget->allocation.width;
attributes.height = widget->allocation.height;
#endif //GTK_VERSION3
attributes.wclass = GDK_INPUT_OUTPUT;
attributes.window_type = GDK_WINDOW_CHILD;
attributes.event_mask = gtk_widget_get_events (widget) |
GDK_EXPOSURE_MASK | GDK_BUTTON_PRESS_MASK |
GDK_BUTTON_RELEASE_MASK | GDK_POINTER_MOTION_MASK;
attributes.visual = gtk_widget_get_visual (widget);
#if defined(GTK_VERSION3)
attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL;
gtk_widget_set_window(
widget,
gdk_window_new(
gtk_widget_get_parent_window(widget),
&attributes,
attributes_mask
)
);
gtk_widget_set_style(
widget,
gtk_style_attach(
gtk_widget_get_style(widget),
gtk_widget_get_window(widget)
)
);
gdk_window_set_user_data (
gtk_widget_get_window(widget),
widget
);
gtk_style_set_background (
gtk_widget_get_style(widget),
gtk_widget_get_window(widget),
GTK_STATE_ACTIVE
);
#else
// The following lines are included to prevent breaking
// compatibility with older Gtk2 (<gtk+-2.18) libraries.
attributes.colormap = gtk_widget_get_colormap (widget);
attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
widget->window = gdk_window_new (widget->parent->window, &attributes, attributes_mask);
widget->style = gtk_style_attach (widget->style, widget->window);
gdk_window_set_user_data (widget->window, widget);
gtk_style_set_background (widget->style, widget->window, GTK_STATE_ACTIVE);
#endif // GTK_VERSION3
}
