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tools: handle pinch event in event-gui

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Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
This commit is contained in:
Peter Hutterer 2015-05-22 11:14:41 +10:00
parent f3f2b312ea
commit bca183ec8e
1 changed files with 68 additions and 1 deletions
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69
tools/event-gui.c
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@ -78,6 +78,13 @@ struct window {
double x, y;
} swipe;
struct {
int nfingers;
double scale;
double angle;
double x, y;
} pinch;
struct libinput_device *devices[50];
};
@ -110,7 +117,7 @@ draw(GtkWidget *widget, cairo_t *cr, gpointer data)
{
struct window *w = data;
struct touch *t;
int i;
int i, offset;
cairo_set_source_rgb(cr, 1, 1, 1);
cairo_rectangle(cr, 0, 0, w->width, w->height);
@ -132,6 +139,26 @@ draw(GtkWidget *widget, cairo_t *cr, gpointer data)
}
cairo_restore(cr);
/* pinch */
cairo_save(cr);
offset = w->pinch.scale * 100;
cairo_translate(cr, w->pinch.x, w->pinch.y);
cairo_rotate(cr, w->pinch.angle * M_PI/180.0);
if (w->pinch.nfingers > 0) {
cairo_set_source_rgb(cr, .4, .4, .8);
cairo_arc(cr, offset, -offset, 20, 0, 2 * M_PI);
cairo_arc(cr, -offset, offset, 20, 0, 2 * M_PI);
cairo_fill(cr);
}
cairo_set_source_rgb(cr, 0, 0, 0);
cairo_arc(cr, offset, -offset, 20, 0, 2 * M_PI);
cairo_stroke(cr);
cairo_arc(cr, -offset, offset, 20, 0, 2 * M_PI);
cairo_stroke(cr);
cairo_restore(cr);
/* draw pointer sprite */
cairo_set_source_rgb(cr, 0, 0, 0);
cairo_save(cr);
@ -212,6 +239,10 @@ map_event_cb(GtkWidget *widget, GdkEvent *event, gpointer data)
w->swipe.x = w->width/2;
w->swipe.y = w->height/2;
w->pinch.scale = 1.0;
w->pinch.x = w->width/2;
w->pinch.y = w->height/2;
g_signal_connect(G_OBJECT(w->area), "draw", G_CALLBACK(draw), w);
window = gdk_event_get_window(event);
@ -485,6 +516,41 @@ handle_event_swipe(struct libinput_event *ev, struct window *w)
}
}
static void
handle_event_pinch(struct libinput_event *ev, struct window *w)
{
struct libinput_event_gesture *g = libinput_event_get_gesture_event(ev);
int nfingers;
double dx, dy;
nfingers = libinput_event_gesture_get_finger_count(g);
switch (libinput_event_get_type(ev)) {
case LIBINPUT_EVENT_GESTURE_PINCH_BEGIN:
w->pinch.nfingers = nfingers;
w->pinch.x = w->width/2;
w->pinch.y = w->height/2;
break;
case LIBINPUT_EVENT_GESTURE_PINCH_UPDATE:
dx = libinput_event_gesture_get_dx(g);
dy = libinput_event_gesture_get_dy(g);
w->pinch.x += dx;
w->pinch.y += dy;
w->pinch.scale = libinput_event_gesture_get_scale(g);
w->pinch.angle += libinput_event_gesture_get_angle_delta(g);
break;
case LIBINPUT_EVENT_GESTURE_PINCH_END:
w->pinch.nfingers = 0;
w->pinch.x = w->width/2;
w->pinch.y = w->height/2;
w->pinch.angle = 0.0;
w->pinch.scale = 1.0;
break;
default:
abort();
}
}
static gboolean
handle_event_libinput(GIOChannel *source, GIOCondition condition, gpointer data)
{
@ -538,6 +604,7 @@ handle_event_libinput(GIOChannel *source, GIOCondition condition, gpointer data)
case LIBINPUT_EVENT_GESTURE_PINCH_BEGIN:
case LIBINPUT_EVENT_GESTURE_PINCH_UPDATE:
case LIBINPUT_EVENT_GESTURE_PINCH_END:
handle_event_pinch(ev, w);
break;
}