scrollbar, options and widgets changes

* complete scrollbar skin
* implement scrollbar functionality (scrolling with mouse)
* fix onMouseClick issues
* add tabs in options (graphics and general tab)
* add new option for limiting frame rate using scrollbar
* add new widget property "clipping" that will be used on scrollable areas

src/framework/ui/uiwidget.cpp

@@ -53,20 +53,14 @@ UIWidget::~UIWidget()
 
 void UIWidget::draw(const Rect& visibleRect)
 {
+    if(m_clipping)
+        g_graphics.beginClipping(visibleRect);
+
     drawSelf();
-    if(m_children.size() > 0) {
-        bool clip = true;
-        if(this == g_ui.getRootWidget().get())
-            clip = false;
+    drawChildren(visibleRect);
 
-        if(clip)
-            g_graphics.beginClipping(visibleRect);
-
-        drawChildren(visibleRect);
-
-        if(clip)
-            g_graphics.endClipping();
-    }
+    if(m_clipping)
+        g_graphics.endClipping();
 }
 
 void UIWidget::drawSelf()
@@ -1325,12 +1319,20 @@ bool UIWidget::onMouseWheel(const Point& mousePos, Fw::MouseWheelDirection direc
 
 bool UIWidget::onClick(const Point& mousePos)
 {
-    return callLuaField<bool>("onClick", mousePos);
+    if(hasLuaField("onClick")) {
+        callLuaField("onClick", mousePos);
+        return true;
+    }
+    return false;
 }
 
 bool UIWidget::onDoubleClick(const Point& mousePos)
 {
-    return callLuaField<bool>("onDoubleClick", mousePos);
+    if(hasLuaField("onDoubleClick")) {
+        callLuaField("onDoubleClick", mousePos);
+        return true;
+    }
+    return false;
 }
 
 bool UIWidget::propagateOnKeyText(const std::string& keyText)

src/framework/ui/uiwidget.h

@@ -41,6 +41,8 @@ struct EdgeGroup {
     T left;
 };
 
+// generate lua bindings for this class running:
+// ./tools/lua-binding-generator/generate_lua_bindings.lua src/framework/ui/uiwidget.h
 class UIWidget : public LuaObject
 {
 // widget core
@@ -65,6 +67,7 @@ protected:
     Boolean<false> m_phantom;
     Boolean<false> m_dragable;
     Boolean<false> m_destroyed;
+    Boolean<false> m_clipping;
     UILayoutPtr m_layout;
     UIWidgetWeakPtr m_parent;
     UIWidgetList m_children;
@@ -120,6 +123,7 @@ public:
     void setPhantom(bool phantom);
     void setDragable(bool dragable);
     void setFixedSize(bool fixed);
+    void setClipping(bool clipping) { m_clipping = clipping; }
     void setLastFocusReason(Fw::FocusReason reason);
     void setAutoRepeatDelay(int delay) { m_autoRepeatDelay = delay; }
     void setVirtualOffset(const Point& offset);
@@ -226,6 +230,7 @@ public:
     bool isPhantom() { return m_phantom; }
     bool isDragable() { return m_dragable; }
     bool isFixedSize() { return m_fixedSize; }
+    bool isClipping() { return m_clipping; }
     bool isDestroyed() { return m_destroyed; }
 
     bool hasChildren() { return m_children.size() > 0; }

src/framework/ui/uiwidgetbasestyle.cpp

@@ -120,6 +120,8 @@ void UIWidget::parseBaseStyle(const OTMLNodePtr& styleNode)
             setSize(node->value<Size>());
         else if(node->tag() == "fixed-size")
             setFixedSize(node->value<bool>());
+        else if(node->tag() == "clipping")
+            setClipping(node->value<bool>());
         else if(node->tag() == "border") {
             auto split = Fw::split(node->value(), " ");
             if(split.size() == 2) {