Add dont-clip-margin feature to ScrollPane

Author: xiaoguzhu

libfairygui/Classes/ScrollPane.cpp

@@ -42,24 +42,25 @@ static inline float sp_EaseFunc(float t, float d)
 
 ScrollPane::ScrollPane(GComponent* owner)
     : _vtScrollBar(nullptr),
-      _hzScrollBar(nullptr),
-      _header(nullptr),
-      _footer(nullptr),
-      _pageController(nullptr),
-      _needRefresh(false),
-      _refreshBarAxis(0),
-      _aniFlag(0),
-      _loop(0),
-      _headerLockedSize(0),
-      _footerLockedSize(0),
-      _vScrollNone(false),
-      _hScrollNone(false),
-      _tweening(0),
-      _xPos(0),
-      _yPos(0),
-      _floating(false),
-      _mouseWheelEnabled(true),
-      _hover(false)
+    _hzScrollBar(nullptr),
+    _header(nullptr),
+    _footer(nullptr),
+    _pageController(nullptr),
+    _needRefresh(false),
+    _refreshBarAxis(0),
+    _aniFlag(0),
+    _loop(0),
+    _headerLockedSize(0),
+    _footerLockedSize(0),
+    _vScrollNone(false),
+    _hScrollNone(false),
+    _tweening(0),
+    _xPos(0),
+    _yPos(0),
+    _floating(false),
+    _dontClipMargin(false),
+    _mouseWheelEnabled(true),
+    _hover(false)
 {
     _owner = owner;
 
@@ -134,6 +135,7 @@ void ScrollPane::setup(ByteBuffer* buffer)
     _inertiaDisabled = (flags & 256) != 0;
     _maskContainer->setClippingEnabled((flags & 512) == 0);
     _floating = (flags & 1024) != 0;
+    _dontClipMargin = (flags & 2048) != 0;
 
     if (scrollBarDisplay == ScrollBarDisplayType::DEFAULT)
     {
@@ -758,6 +760,13 @@ void ScrollPane::handleSizeChanged()
         maskRect.size.width += _vtScrollBar->getWidth();
     if (_hScrollNone && _hzScrollBar != nullptr)
         maskRect.size.height += _hzScrollBar->getHeight();
+    if (_dontClipMargin)
+    {
+        maskRect.origin.x -= _owner->_margin.left;
+        maskRect.size.width += _owner->_margin.left + _owner->_margin.right;
+        maskRect.origin.y -= _owner->_margin.top;
+        maskRect.size.height += _owner->_margin.top + _owner->_margin.bottom;
+    }
     _maskContainer->setClippingRegion(maskRect);
 
     if (_vtScrollBar)
@@ -787,10 +796,10 @@ void ScrollPane::handleSizeChanged()
         max += _footerLockedSize;
     if (_refreshBarAxis == 0)
         _container->setPosition2(clampf(_container->getPositionX(), -max, _headerLockedSize),
-                                 clampf(_container->getPositionY2(), -_overlapSize.height, 0));
+            clampf(_container->getPositionY2(), -_overlapSize.height, 0));
     else
         _container->setPosition2(clampf(_container->getPositionX(), -_overlapSize.width, 0),
-                                 clampf(_container->getPositionY2(), -max, _headerLockedSize));
+            clampf(_container->getPositionY2(), -max, _headerLockedSize));
 
     if (_header != nullptr)
     {
@@ -977,9 +986,9 @@ void ScrollPane::updateScrollBarVisible2(GScrollBar* bar)
     {
         if (bar->isVisible())
             GTween::to(1, 0, 0.5f)
-                ->setDelay(0.5f)
-                ->onComplete1(CC_CALLBACK_1(ScrollPane::onBarTweenComplete, this))
-                ->setTarget(bar, TweenPropType::Alpha);
+            ->setDelay(0.5f)
+            ->onComplete1(CC_CALLBACK_1(ScrollPane::onBarTweenComplete, this))
+            ->setTarget(bar, TweenPropType::Alpha);
     }
     else
     {
@@ -1221,7 +1230,7 @@ float ScrollPane::updateTargetAndDuration(float pos, int axis)
         {
             if (v2 > 1000)
                 ratio = pow((v2 - 1000) / 1000, 2);
-        }
+    }
 #endif
 
         if (ratio != 0)
@@ -1237,7 +1246,7 @@ float ScrollPane::updateTargetAndDuration(float pos, int axis)
             float change = (int)(v * duration * 0.4f);
             pos += change;
         }
-    }
+}
 
     if (duration < TWEEN_TIME_DEFAULT)
         duration = TWEEN_TIME_DEFAULT;

libfairygui/Classes/ScrollPane.h

@@ -165,6 +165,7 @@ class ScrollPane : public cocos2d::Ref
     float _decelerationRate;
     bool _pageMode;
     bool _floating;
+    bool _dontClipMargin;
 
     float _xPos;
     float _yPos;