[gtk+/wip/garnacho/touchpad-gestures: 128/141] gdk: Add touchpad gesture events and event types.

[Carlos Garnacho <carlosg src gnome org>]

commit 106623e691e18896f5ec13ae60e3e8afaeeb8aa9
Author: Carlos Garnacho <carlosg gnome org>
Date:   Thu Jul 9 18:39:58 2015 +0200

    gdk: Add touchpad gesture events and event types.
    
    Each gesture type has its separate GdkEvent struct, and begin/update/
    end/cancel event types.
    
    There is support for multi-finger swipe (3-4 fingers), and 2-finger
    rotate/pinch gestures.

 gdk/gdkevents.c |   74 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 gdk/gdkevents.h |   41 ++++++++++++++++++++++++++++++
 2 files changed, 115 insertions(+), 0 deletions(-)
---
diff --git a/gdk/gdkevents.c b/gdk/gdkevents.c
index 3d8d7bc..a8dc932 100644
--- a/gdk/gdkevents.c
+++ b/gdk/gdkevents.c
@@ -570,6 +570,30 @@ gdk_event_new (GdkEventType type)
       new_event->crossing.x_root = 0.;
       new_event->crossing.y_root = 0.;
       break;
+    case GDK_TOUCHPAD_SWIPE_BEGIN:
+    case GDK_TOUCHPAD_SWIPE_UPDATE:
+    case GDK_TOUCHPAD_SWIPE_END:
+    case GDK_TOUCHPAD_SWIPE_CANCEL:
+      new_event->touchpad_swipe.x = 0;
+      new_event->touchpad_swipe.y = 0;
+      new_event->touchpad_swipe.dx = 0;
+      new_event->touchpad_swipe.dy = 0;
+      new_event->touchpad_swipe.x_root = 0;
+      new_event->touchpad_swipe.y_root = 0;
+      break;
+    case GDK_TOUCHPAD_PINCH_BEGIN:
+    case GDK_TOUCHPAD_PINCH_UPDATE:
+    case GDK_TOUCHPAD_PINCH_END:
+    case GDK_TOUCHPAD_PINCH_CANCEL:
+      new_event->touchpad_pinch.x = 0;
+      new_event->touchpad_pinch.y = 0;
+      new_event->touchpad_pinch.dx = 0;
+      new_event->touchpad_pinch.dy = 0;
+      new_event->touchpad_pinch.angle_delta = 0;
+      new_event->touchpad_pinch.scale = 0;
+      new_event->touchpad_pinch.x_root = 0;
+      new_event->touchpad_pinch.y_root = 0;
+      break;
     default:
       break;
     }
@@ -863,6 +887,16 @@ gdk_event_get_time (const GdkEvent *event)
       case GDK_TOUCH_END:
       case GDK_TOUCH_CANCEL:
         return event->touch.time;
+      case GDK_TOUCHPAD_SWIPE_BEGIN:
+      case GDK_TOUCHPAD_SWIPE_UPDATE:
+      case GDK_TOUCHPAD_SWIPE_END:
+      case GDK_TOUCHPAD_SWIPE_CANCEL:
+        return event->touchpad_swipe.time;
+      case GDK_TOUCHPAD_PINCH_BEGIN:
+      case GDK_TOUCHPAD_PINCH_UPDATE:
+      case GDK_TOUCHPAD_PINCH_END:
+      case GDK_TOUCHPAD_PINCH_CANCEL:
+        return event->touchpad_pinch.time;
       case GDK_SCROLL:
         return event->scroll.time;
       case GDK_KEY_PRESS:
@@ -946,6 +980,18 @@ gdk_event_get_state (const GdkEvent        *event,
       case GDK_TOUCH_CANCEL:
         *state = event->touch.state;
         return TRUE;
+      case GDK_TOUCHPAD_SWIPE_BEGIN:
+      case GDK_TOUCHPAD_SWIPE_UPDATE:
+      case GDK_TOUCHPAD_SWIPE_END:
+      case GDK_TOUCHPAD_SWIPE_CANCEL:
+        *state = event->touchpad_swipe.state;
+        return TRUE;
+      case GDK_TOUCHPAD_PINCH_BEGIN:
+      case GDK_TOUCHPAD_PINCH_UPDATE:
+      case GDK_TOUCHPAD_PINCH_END:
+      case GDK_TOUCHPAD_PINCH_CANCEL:
+        *state = event->touchpad_pinch.state;
+        return TRUE;
       case GDK_SCROLL:
        *state =  event->scroll.state;
         return TRUE;
@@ -1046,6 +1092,20 @@ gdk_event_get_coords (const GdkEvent *event,
       x = event->motion.x;
       y = event->motion.y;
       break;
+    case GDK_TOUCHPAD_SWIPE_BEGIN:
+    case GDK_TOUCHPAD_SWIPE_UPDATE:
+    case GDK_TOUCHPAD_SWIPE_END:
+    case GDK_TOUCHPAD_SWIPE_CANCEL:
+      x = event->touchpad_swipe.x;
+      y = event->touchpad_swipe.y;
+      break;
+    case GDK_TOUCHPAD_PINCH_BEGIN:
+    case GDK_TOUCHPAD_PINCH_UPDATE:
+    case GDK_TOUCHPAD_PINCH_END:
+    case GDK_TOUCHPAD_PINCH_CANCEL:
+      x = event->touchpad_pinch.x;
+      y = event->touchpad_pinch.y;
+      break;
     default:
       fetched = FALSE;
       break;
@@ -1117,6 +1177,20 @@ gdk_event_get_root_coords (const GdkEvent *event,
       x = event->dnd.x_root;
       y = event->dnd.y_root;
       break;
+    case GDK_TOUCHPAD_SWIPE_BEGIN:
+    case GDK_TOUCHPAD_SWIPE_UPDATE:
+    case GDK_TOUCHPAD_SWIPE_END:
+    case GDK_TOUCHPAD_SWIPE_CANCEL:
+      x = event->touchpad_swipe.x_root;
+      y = event->touchpad_swipe.y_root;
+      break;
+    case GDK_TOUCHPAD_PINCH_BEGIN:
+    case GDK_TOUCHPAD_PINCH_UPDATE:
+    case GDK_TOUCHPAD_PINCH_END:
+    case GDK_TOUCHPAD_PINCH_CANCEL:
+      x = event->touchpad_pinch.x_root;
+      y = event->touchpad_pinch.y_root;
+      break;
     default:
       fetched = FALSE;
       break;
diff --git a/gdk/gdkevents.h b/gdk/gdkevents.h
index d681de7..1141047 100644
--- a/gdk/gdkevents.h
+++ b/gdk/gdkevents.h
@@ -139,6 +139,8 @@ typedef struct _GdkEventDND         GdkEventDND;
 typedef struct _GdkEventWindowState GdkEventWindowState;
 typedef struct _GdkEventSetting     GdkEventSetting;
 typedef struct _GdkEventGrabBroken  GdkEventGrabBroken;
+typedef struct _GdkEventTouchpadSwipe GdkEventTouchpadSwipe;
+typedef struct _GdkEventTouchpadPinch GdkEventTouchpadPinch;
 
 typedef struct _GdkEventSequence    GdkEventSequence;
 
@@ -331,6 +333,14 @@ typedef enum
   GDK_TOUCH_UPDATE      = 38,
   GDK_TOUCH_END         = 39,
   GDK_TOUCH_CANCEL      = 40,
+  GDK_TOUCHPAD_SWIPE_BEGIN  = 41,
+  GDK_TOUCHPAD_SWIPE_UPDATE = 42,
+  GDK_TOUCHPAD_SWIPE_END    = 43,
+  GDK_TOUCHPAD_SWIPE_CANCEL = 44,
+  GDK_TOUCHPAD_PINCH_BEGIN  = 45,
+  GDK_TOUCHPAD_PINCH_UPDATE = 46,
+  GDK_TOUCHPAD_PINCH_END    = 47,
+  GDK_TOUCHPAD_PINCH_CANCEL = 48,
   GDK_EVENT_LAST        /* helper variable for decls */
 } GdkEventType;
 
@@ -1113,6 +1123,35 @@ struct _GdkEventDND {
   gshort x_root, y_root;
 };
 
+struct _GdkEventTouchpadSwipe {
+  GdkEventType type;
+  GdkWindow *window;
+  gint8 send_event;
+  guint32 time;
+  gdouble x;
+  gdouble y;
+  gdouble dx;
+  gdouble dy;
+  gdouble x_root, y_root;
+  guint state;
+  guint16 n_fingers;
+};
+
+struct _GdkEventTouchpadPinch {
+  GdkEventType type;
+  GdkWindow *window;
+  gint8 send_event;
+  guint32 time;
+  gdouble x;
+  gdouble y;
+  gdouble dx;
+  gdouble dy;
+  gdouble angle_delta;
+  gdouble scale;
+  gdouble x_root, y_root;
+  guint state;
+};
+
 /**
  * GdkEvent:
  * @type: the #GdkEventType
@@ -1189,6 +1228,8 @@ union _GdkEvent
   GdkEventWindowState       window_state;
   GdkEventSetting           setting;
   GdkEventGrabBroken        grab_broken;
+  GdkEventTouchpadSwipe     touchpad_swipe;
+  GdkEventTouchpadPinch     touchpad_pinch;
 };
 
 GDK_AVAILABLE_IN_ALL