Feel up your widgets.

1 files changed, 173 insertions, 0 deletions

diff --git a/example/gesture.c b/example/gesture.c
new file mode 100644
index 0000000..57c4c24
--- /dev/null
+++ b/example/gesture.c
@@ -0,0 +1,173 @@
+#include <stdlib.h>
+#include <string.h>
+#include <signal.h>
+
+#include "idogesturemanager.h"
+
+static gint    rotate = 0;
+static gdouble scale = 1.0;
+static gdouble translate[2] = { 200, 200 };
+static gint    in_touch = 0;
+
+static gboolean
+expose_event (GtkWidget      *widget,
+              GdkEventExpose *event,
+              gpointer        data)
+{
+  cairo_t *cr;
+  gdouble radians;
+  gint width = (in_touch > 0) ? 10 : 1;
+
+  cr = gdk_cairo_create (widget->window);
+
+  cairo_set_source_rgb (cr, 0, 0, 0);
+  cairo_set_line_width (cr, width);
+
+  radians = rotate * (G_PI / 180);
+  cairo_translate (cr, translate[0], translate[1]);
+  cairo_scale (cr, scale, scale);
+  cairo_rotate (cr, radians);
+
+  cairo_rectangle (cr, -50, -50, 100, 100);
+  cairo_stroke_preserve (cr);
+  cairo_set_source_rgb (cr, 1, 0, 1);
+  cairo_fill (cr);
+
+  cairo_destroy (cr);
+
+  return FALSE;
+}
+
+GtkWidget *
+create_window (void)
+{
+  GtkWidget *window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
+  GtkWidget *da;
+  const GdkColor white = { 0, 0xffff, 0xffff, 0xffff };
+
+  gtk_window_set_title (GTK_WINDOW (window), "Touch Demo");
+  gtk_window_set_default_size (GTK_WINDOW (window), 600, 600);
+  g_signal_connect (window, "destroy", G_CALLBACK (gtk_widget_destroyed), &window);
+
+  da = gtk_drawing_area_new ();
+  gtk_container_add (GTK_CONTAINER (window), da);
+
+  gtk_widget_modify_bg (da, GTK_STATE_NORMAL, &white);
+
+  g_signal_connect (da, "expose-event",
+                    G_CALLBACK (expose_event), NULL);
+
+  return window;
+}
+
+static void
+gesture_start (GtkWindow       *window,
+               IdoGestureEvent *event)
+{
+  in_touch++;
+
+  gtk_widget_queue_draw (GTK_WIDGET (window));
+}
+
+static void
+gesture_end (GtkWindow       *window,
+             IdoGestureEvent *event)
+{
+  in_touch--;
+
+  gtk_widget_queue_draw (GTK_WIDGET (window));
+}
+
+static void
+rotate_update (GtkWindow       *window,
+               IdoGestureEvent *event)
+{
+  IdoEventGestureRotate *e = (IdoEventGestureRotate *)event;
+
+  rotate += e->angle_delta * 100;
+
+  gtk_widget_queue_draw (GTK_WIDGET (window));
+}
+
+static void
+pinch_update (GtkWindow       *window,
+              IdoGestureEvent *event)
+{
+  IdoEventGesturePinch *e = (IdoEventGesturePinch *)event;
+
+  scale += e->radius_delta / 100;
+
+  gtk_widget_queue_draw (GTK_WIDGET (window));
+}
+
+static void
+drag_update (GtkWindow       *window,
+             IdoGestureEvent *event)
+{
+  IdoEventGestureDrag *e = (IdoEventGestureDrag *)event;
+
+  translate[0] += e->delta_x;
+  translate[1] += e->delta_y;
+
+  gtk_widget_queue_draw (GTK_WIDGET (window));
+}
+
+static void
+window_mapped (GtkWidget *widget)
+{
+  IdoGestureManager *manager = ido_gesture_manager_get ();
+  GtkWindow *window = GTK_WINDOW (widget);
+
+  ido_gesture_manager_register_window (manager,
+                                       window,
+                                       IDO_GESTURE_PINCH2,
+                                       gesture_start,
+                                       pinch_update,
+                                       gesture_end);
+
+  ido_gesture_manager_register_window (manager,
+                                       window,
+                                       IDO_GESTURE_ROTATE2,
+                                       gesture_start,
+                                       rotate_update,
+                                       gesture_end);
+
+  ido_gesture_manager_register_window (manager,
+                                       window,
+                                       IDO_GESTURE_DRAG2,
+                                       gesture_start,
+                                       drag_update,
+                                       gesture_end);
+}
+
+static void
+abort_handler (int x)
+{
+  g_print (" **** ABORT ****\n");
+
+  exit (1);
+}
+
+int
+main (int argc, char **argv)
+{
+  GtkWidget *window;
+
+  gtk_init (&argc, &argv);
+
+  /* Don't crash X if we're using some shitty Intel graphics like
+   * my Dell XT2 has in it. */
+  signal (SIGABRT, abort_handler);
+
+  window = create_window ();
+
+  g_signal_connect (window, "destroy", G_CALLBACK (gtk_main_quit), NULL);
+  g_signal_connect (window, "map-event", G_CALLBACK (window_mapped), NULL);
+
+  gtk_widget_show_all (window);
+
+  gtk_main ();
+
+  return 0;
+}
+