GtkWidget *
do_foreigndrawing (GtkWidget *do_widget)
{
static GtkWidget *window = NULL;
if (!window)
{
GtkWidget *box;
GtkWidget *da;
window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
gtk_window_set_title (GTK_WINDOW (window), "Foreign drawing");
gtk_window_set_display (GTK_WINDOW (window),
gtk_widget_get_display (do_widget));
g_signal_connect (window, "destroy",
G_CALLBACK (gtk_widget_destroyed), &window);
box = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 10);
gtk_container_add (GTK_CONTAINER (window), box);
da = gtk_drawing_area_new ();
gtk_drawing_area_set_content_width (GTK_DRAWING_AREA (da), 400);
gtk_drawing_area_set_content_height (GTK_DRAWING_AREA (da), 400);
gtk_drawing_area_set_draw_func (GTK_DRAWING_AREA (da), draw_func, NULL, NULL);
gtk_widget_set_hexpand (da, TRUE);
gtk_widget_set_vexpand (da, TRUE);
gtk_container_add (GTK_CONTAINER (box), da);
}
if (!gtk_widget_get_visible (window))
gtk_widget_show (window);
else
gtk_widget_destroy (window);
return window;
}
int
main (int argc, char **argv)
{
GtkWidget *window, *darea;
gtk_init (&argc, &argv);
window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
gtk_window_set_default_size (GTK_WINDOW (window), 400, 400);
gtk_window_set_title (GTK_WINDOW (window), "cairo: Knockout Groups");
darea = gtk_drawing_area_new ();
gtk_container_add (GTK_CONTAINER (window), darea);
gtk_drawing_area_set_draw_func (GTK_DRAWING_AREA (darea), on_draw, NULL, NULL);
g_signal_connect (window, "destroy-event",
G_CALLBACK (gtk_main_quit), NULL);
gtk_widget_show_all (window);
gtk_main ();
return 0;
}
GtkWidget *
do_rotated_text (GtkWidget *do_widget)
{
static GtkWidget *window = NULL;
if (!window)
{
GtkWidget *box;
GtkWidget *drawing_area;
GtkWidget *label;
PangoLayout *layout;
PangoAttrList *attrs;
window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
gtk_window_set_screen (GTK_WINDOW (window),
gtk_widget_get_screen (do_widget));
gtk_window_set_title (GTK_WINDOW (window), "Rotated Text");
gtk_window_set_default_size (GTK_WINDOW (window), 4 * RADIUS, 2 * RADIUS);
g_signal_connect (window, "destroy",
G_CALLBACK (gtk_widget_destroyed), &window);
box = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 0);
gtk_box_set_homogeneous (GTK_BOX (box), TRUE);
gtk_container_add (GTK_CONTAINER (window), box);
/* Add a drawing area */
drawing_area = gtk_drawing_area_new ();
gtk_container_add (GTK_CONTAINER (box), drawing_area);
gtk_style_context_add_class (gtk_widget_get_style_context (drawing_area),
GTK_STYLE_CLASS_VIEW);
gtk_drawing_area_set_draw_func (GTK_DRAWING_AREA (drawing_area),
rotated_text_draw,
NULL, NULL);
/* And a label */
label = gtk_label_new (text);
gtk_container_add (GTK_CONTAINER (box), label);
gtk_label_set_angle (GTK_LABEL (label), 45);
/* Set up fancy stuff on the label */
layout = gtk_label_get_layout (GTK_LABEL (label));
pango_cairo_context_set_shape_renderer (pango_layout_get_context (layout),
fancy_shape_renderer,
NULL, NULL);
attrs = create_fancy_attr_list_for_layout (layout);
gtk_label_set_attributes (GTK_LABEL (label), attrs);
pango_attr_list_unref (attrs);
}
if (!gtk_widget_get_visible (window))
gtk_widget_show_all (window);
else
gtk_widget_destroy (window);
return window;
}
int
main (int argc, char *argv[])
{
GtkWidget *window, *vbox, *label;
GtkWidget *combo, *scale, *overlay, *da;
gtk_init (&argc, &argv);
window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
gtk_window_set_default_size (GTK_WINDOW (window), 400, 300);
g_signal_connect (window, "destroy", G_CALLBACK (gtk_main_quit), NULL);
vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 6);
gtk_container_add (GTK_CONTAINER (window), vbox);
combo = gtk_combo_box_text_new ();
scale = gtk_scale_new_with_range (GTK_ORIENTATION_HORIZONTAL,
0, 360, 1);
label = gtk_label_new ("This label may be ellipsized\nto make it fit.");
gtk_combo_box_text_append_text (GTK_COMBO_BOX_TEXT (combo), "NONE");
gtk_combo_box_text_append_text (GTK_COMBO_BOX_TEXT (combo), "START");
gtk_combo_box_text_append_text (GTK_COMBO_BOX_TEXT (combo), "MIDDLE");
gtk_combo_box_text_append_text (GTK_COMBO_BOX_TEXT (combo), "END");
gtk_combo_box_set_active (GTK_COMBO_BOX (combo), 0);
gtk_widget_set_halign (label, GTK_ALIGN_CENTER);
gtk_widget_set_valign (label, GTK_ALIGN_CENTER);
da = gtk_drawing_area_new ();
gtk_drawing_area_set_draw_func (GTK_DRAWING_AREA (da), overlay_draw, label, NULL);
overlay = gtk_overlay_new ();
gtk_container_add (GTK_CONTAINER (overlay), da);
gtk_overlay_add_overlay (GTK_OVERLAY (overlay), label);
gtk_box_pack_start (GTK_BOX (vbox), combo, FALSE, TRUE);
gtk_box_pack_start (GTK_BOX (vbox), scale, FALSE, TRUE);
gtk_box_pack_start (GTK_BOX (vbox), overlay, TRUE, TRUE);
g_object_set_data (G_OBJECT (label), "combo", combo);
g_signal_connect (combo, "changed", G_CALLBACK (combo_changed_cb), label);
g_signal_connect (scale, "value-changed", G_CALLBACK (scale_changed_cb), label);
gtk_widget_show_all (window);
gtk_main ();
return 0;
}
static gboolean
on_map_event (GtkWidget *parent,
GdkEvent *event,
gpointer data)
{
GtkWidget *popup, *da;
popup = gtk_window_new (GTK_WINDOW_POPUP);
da = gtk_drawing_area_new ();
gtk_drawing_area_set_draw_func (GTK_DRAWING_AREA (da), draw_popup, NULL, NULL);
gtk_container_add (GTK_CONTAINER (popup), da);
gtk_widget_set_size_request (GTK_WIDGET (popup), 20, 20);
gtk_window_set_transient_for (GTK_WINDOW (popup), GTK_WINDOW (parent));
g_signal_connect (parent, "motion-notify-event", G_CALLBACK (place_popup), popup);
gtk_widget_show_all (popup);
return FALSE;
}
GtkWidget *
do_drawingarea (GtkWidget *do_widget)
{
GtkWidget *frame;
GtkWidget *vbox;
GtkWidget *da;
GtkWidget *label;
GtkGesture *drag;
if (!window)
{
window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
gtk_window_set_display (GTK_WINDOW (window),
gtk_widget_get_display (do_widget));
gtk_window_set_title (GTK_WINDOW (window), "Drawing Area");
g_signal_connect (window, "destroy",
G_CALLBACK (close_window), NULL);
vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 8);
g_object_set (vbox, "margin", 16, NULL);
gtk_container_add (GTK_CONTAINER (window), vbox);
/*
* Create the checkerboard area
*/
label = gtk_label_new (NULL);
gtk_label_set_markup (GTK_LABEL (label),
"<u>Checkerboard pattern</u>");
gtk_container_add (GTK_CONTAINER (vbox), label);
frame = gtk_frame_new (NULL);
gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_IN);
gtk_widget_set_vexpand (frame, TRUE);
gtk_container_add (GTK_CONTAINER (vbox), frame);
da = gtk_drawing_area_new ();
gtk_drawing_area_set_content_width (GTK_DRAWING_AREA (da), 100);
gtk_drawing_area_set_content_height (GTK_DRAWING_AREA (da), 100);
gtk_drawing_area_set_draw_func (GTK_DRAWING_AREA (da), checkerboard_draw, NULL, NULL);
gtk_container_add (GTK_CONTAINER (frame), da);
/*
* Create the scribble area
*/
label = gtk_label_new (NULL);
gtk_label_set_markup (GTK_LABEL (label),
"<u>Scribble area</u>");
gtk_container_add (GTK_CONTAINER (vbox), label);
frame = gtk_frame_new (NULL);
gtk_widget_set_vexpand (frame, TRUE);
gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_IN);
gtk_container_add (GTK_CONTAINER (vbox), frame);
da = gtk_drawing_area_new ();
gtk_drawing_area_set_content_width (GTK_DRAWING_AREA (da), 100);
gtk_drawing_area_set_content_height (GTK_DRAWING_AREA (da), 100);
gtk_drawing_area_set_draw_func (GTK_DRAWING_AREA (da), scribble_draw, NULL, NULL);
gtk_container_add (GTK_CONTAINER (frame), da);
g_signal_connect (da, "size-allocate",
G_CALLBACK (scribble_size_allocate), NULL);
drag = gtk_gesture_drag_new ();
gtk_gesture_single_set_button (GTK_GESTURE_SINGLE (drag), GDK_BUTTON_PRIMARY);
gtk_widget_add_controller (da, GTK_EVENT_CONTROLLER (drag));
g_signal_connect (drag, "drag-begin", G_CALLBACK (drag_begin), da);
g_signal_connect (drag, "drag-update", G_CALLBACK (drag_update), da);
g_signal_connect (drag, "drag-end", G_CALLBACK (drag_end), da);
}
if (!gtk_widget_get_visible (window))
gtk_widget_show (window);
else
gtk_widget_destroy (window);
return window;
}
GtkWidget *
do_drawingarea (GtkWidget *do_widget)
{
GtkWidget *frame;
GtkWidget *vbox;
GtkWidget *da;
GtkWidget *label;
if (!window)
{
window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
gtk_window_set_screen (GTK_WINDOW (window),
gtk_widget_get_screen (do_widget));
gtk_window_set_title (GTK_WINDOW (window), "Drawing Area");
g_signal_connect (window, "destroy",
G_CALLBACK (close_window), NULL);
vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 8);
g_object_set (vbox, "margin", 16, NULL);
gtk_container_add (GTK_CONTAINER (window), vbox);
/*
* Create the checkerboard area
*/
label = gtk_label_new (NULL);
gtk_label_set_markup (GTK_LABEL (label),
"<u>Checkerboard pattern</u>");
gtk_box_pack_start (GTK_BOX (vbox), label, FALSE, FALSE);
frame = gtk_frame_new (NULL);
gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_IN);
gtk_box_pack_start (GTK_BOX (vbox), frame, TRUE, TRUE);
da = gtk_drawing_area_new ();
gtk_drawing_area_set_content_width (GTK_DRAWING_AREA (da), 100);
gtk_drawing_area_set_content_height (GTK_DRAWING_AREA (da), 100);
gtk_drawing_area_set_draw_func (GTK_DRAWING_AREA (da), checkerboard_draw, NULL, NULL);
gtk_container_add (GTK_CONTAINER (frame), da);
/*
* Create the scribble area
*/
label = gtk_label_new (NULL);
gtk_label_set_markup (GTK_LABEL (label),
"<u>Scribble area</u>");
gtk_box_pack_start (GTK_BOX (vbox), label, FALSE, FALSE);
frame = gtk_frame_new (NULL);
gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_IN);
gtk_box_pack_start (GTK_BOX (vbox), frame, TRUE, TRUE);
da = gtk_drawing_area_new ();
gtk_drawing_area_set_content_width (GTK_DRAWING_AREA (da), 100);
gtk_drawing_area_set_content_height (GTK_DRAWING_AREA (da), 100);
gtk_drawing_area_set_draw_func (GTK_DRAWING_AREA (da), scribble_draw, NULL, NULL);
gtk_container_add (GTK_CONTAINER (frame), da);
/* Signals used to handle backing surface */
g_signal_connect (da,"configure-event",
G_CALLBACK (scribble_configure_event), NULL);
/* Event signals */
g_signal_connect (da, "motion-notify-event",
G_CALLBACK (scribble_motion_notify_event), NULL);
g_signal_connect (da, "button-press-event",
G_CALLBACK (scribble_button_press_event), NULL);
/* Ask to receive events the drawing area doesn't normally
* subscribe to
*/
gtk_widget_set_events (da, gtk_widget_get_events (da)
| GDK_LEAVE_NOTIFY_MASK
| GDK_BUTTON_PRESS_MASK
| GDK_POINTER_MOTION_MASK
| GDK_POINTER_MOTION_HINT_MASK);
}
if (!gtk_widget_get_visible (window))
gtk_widget_show_all (window);
else
gtk_widget_destroy (window);
return window;
}
