Change touch end processing (#45)

1. removed the generic touchedWindow processing
2. replaced it with an implicit capture processing
3. therefore it works like normal in all instances except ListBox() which explicitely captures the up.

radio/src/thirdparty/libopenui/src/mainwindow.cpp

@@ -150,8 +150,8 @@ void MainWindow::checkEvents()
       touchState.lastDeltaY += SLIDE_SPEED_REDUCTION;
     else
       touchState.lastDeltaY = 0;
-
-    touchedWindow = nullptr;  // this is also an end of a touch so reset the touched window. Fixes scroll and touch bug
+    
+    Window::capturedWindow = nullptr;
 
     onTouchSlide(touchState.x, touchState.y, touchState.startX, touchState.startY, touchState.lastDeltaX, touchState.lastDeltaY);
   } else if (touchState.event == TE_SLIDE_END && slidingWindow == nullptr) {

radio/src/thirdparty/libopenui/src/window.cpp

@@ -22,7 +22,7 @@
 
 Window * Window::focusWindow = nullptr;
 Window * Window::slidingWindow = nullptr;
-Window * Window::touchedWindow = nullptr;
+Window * Window::capturedWindow = nullptr;
 std::list<Window *> Window::trash;
 
 Window::Window(Window * parent, const rect_t & rect, WindowFlags windowFlags, LcdFlags textFlags):
@@ -412,12 +412,6 @@ bool Window::onTouchStart(coord_t x, coord_t y)
     auto child = *it;
     if (child->rect.contains(x, y)) {
       if (child->onTouchStart(x - child->rect.x + child->scrollPositionX, y - child->rect.y + child->scrollPositionY)) {
-        // remember the first window that processed the touch start event.  We will give that window
-        // the opportunity to process the touchend first, and also after a slide end so the touched window
-        // always gets a touchEnd if it processed the touch start.
-        if (touchedWindow == nullptr) {
-          touchedWindow = child;
-        }
         return true;
       }
     }
@@ -428,24 +422,11 @@ bool Window::onTouchStart(coord_t x, coord_t y)
 
 bool Window::forwardTouchEnd(coord_t x, coord_t y)
 {
-  // give the touched window the opportunity to process the touch first before it is 
-  // forwarded: See on touchstart
-  if (touchedWindow != nullptr) {
-    auto savedTouchWindow = touchedWindow;
-    touchedWindow = nullptr;
-    // transalte  x and y through the parent hierarchy
-    auto myParent = savedTouchWindow->parent;
-    while(myParent != nullptr) {
-      x = x - myParent->rect.x + myParent->scrollPositionX;
-      y = y - myParent->rect.y + myParent->scrollPositionY;
-      myParent = myParent->parent;
-    }
-
-    if (savedTouchWindow->onTouchEnd(
-          x - savedTouchWindow->rect.x + savedTouchWindow->scrollPositionX, 
-          y - savedTouchWindow->rect.y + savedTouchWindow->scrollPositionY)) {
-      return true;
-    }
+  if (capturedWindow != nullptr)
+  {
+    capturedWindow->onTouchEnd(x, y);
+    capturedWindow = nullptr;
+    return true;
   }
 
   for (auto it = children.rbegin(); it != children.rend(); ++it) {

radio/src/thirdparty/libopenui/src/window.h

@@ -321,6 +321,11 @@ class Window
       return scrollPositionX;
     }
 
+    void captureWindow(Window *window)
+    {
+      capturedWindow = window;
+    }
+
     coord_t getScrollPositionY() const
     {
       return scrollPositionY;
@@ -395,7 +400,7 @@ class Window
 
     static Window * focusWindow;
     static Window * slidingWindow;
-    static Window * touchedWindow;
+    static Window * capturedWindow;
     static std::list<Window *> trash;
 
     std::function<void()> closeHandler;