Disable interactions on GLView (#2465)

disable interactions on GLView

Author: AlexandreK38

core/platform/GLView.cpp

@@ -116,6 +116,7 @@ GLView::GLView()
     , _scaleX(1.0f)
     , _scaleY(1.0f)
     , _resolutionPolicy(ResolutionPolicy::UNKNOWN)
+    , _interactive(true)
 {}
 
 GLView::~GLView() {}
@@ -294,6 +295,9 @@ std::string_view GLView::getViewName() const
 
 void GLView::handleTouchesBegin(int num, intptr_t ids[], float xs[], float ys[])
 {
+    if (!_interactive)
+        return;
+
     intptr_t id     = 0;
     float x         = 0.0f;
     float y         = 0.0f;
@@ -348,6 +352,9 @@ void GLView::handleTouchesMove(int num, intptr_t ids[], float xs[], float ys[])
 
 void GLView::handleTouchesMove(int num, intptr_t ids[], float xs[], float ys[], float fs[], float ms[])
 {
+    if (!_interactive)
+        return;
+
     intptr_t id    = 0;
     float x        = 0.0f;
     float y        = 0.0f;
@@ -501,4 +508,44 @@ void GLView::queueOperation(AsyncOperation /*op*/, void* /*param*/)
 {
 }
 
+void GLView::setInteractive(bool interactive)
+{
+    if (_interactive && !interactive)
+    {
+        cancelAllTouches();
+    }
+
+    _interactive = interactive;
+}
+
+void GLView::cancelAllTouches()
+{
+    EventTouch touchEvent;
+    touchEvent._touches = getAllTouchesVector();
+    touchEvent._eventCode = EventTouch::EventCode::CANCELLED;
+
+    if (touchEvent._touches.empty())
+    {
+        AXLOGD("cancelling all touches: size = 0");
+        return;
+    }
+
+    auto dispatcher= Director::getInstance()->getEventDispatcher();
+    dispatcher->dispatchEvent(&touchEvent);
+
+    for (auto&& touch : touchEvent._touches)
+    {
+        // release the touch object.
+        touch->release();
+    }
+
+    g_touchIdReorderMap.clear();
+    g_indexBitsUsed = 0;
+
+    for (int i = 0; i < EventTouch::MAX_TOUCHES; ++i)
+    {
+        g_touches[i] = nullptr;
+    }
+}
+
 }

core/platform/GLView.h

@@ -442,11 +442,17 @@ class AX_DLL GLView : public Object
      */
     void renderScene(Scene* scene, Renderer* renderer);
 
+    /**
+     * Enable or disable interactions.
+     * When disabled, it prevents touches to be dispatched and will cancel current touches
+     */
+    void setInteractive(bool interactive);
+
 protected:
     float transformInputX(float x) { return (x - _viewPortRect.origin.x) / _scaleX; }
     float transformInputY(float y) { return (y - _viewPortRect.origin.y) / _scaleY; }
 
-    /** 
+    /**
      * queue a priority operation in render thread for non-PC platforms, even through app in background
      * invoked by Director
      */
@@ -468,6 +474,11 @@ class AX_DLL GLView : public Object
     float _scaleX;
     float _scaleY;
     ResolutionPolicy _resolutionPolicy;
+
+private:
+    void cancelAllTouches();
+
+    bool _interactive;
 };
 
 // end of platform group