1 files changed, 173 insertions, 0 deletions
diff --git a/src/gui/interface/ScrollPanel.cpp b/src/gui/interface/ScrollPanel.cpp
new file mode 100644
index 0000000..74f6b62
--- /dev/null
+++ b/src/gui/interface/ScrollPanel.cpp
@@ -0,0 +1,173 @@
+#include <iostream>
+#include "ScrollPanel.h"
+
+using namespace ui;
+
+ScrollPanel::ScrollPanel(Point position, Point size):
+	Panel(position, size),
+	maxOffset(0, 0),
+	offsetX(0),
+	offsetY(0),
+	yScrollVel(0.0f),
+	xScrollVel(0.0f),
+	scrollBarWidth(0),
+	isMouseInsideScrollbar(false),
+	scrollbarSelected(false),
+	scrollbarInitialYOffset(0),
+	scrollbarInitialYClick(0)
+{
+
+}
+
+int ScrollPanel::GetScrollLimit()
+{
+	if(ViewportPosition.Y == 0)
+		return -1;
+	else if(maxOffset.Y == -ViewportPosition.Y)
+		return 1;
+	return 0;
+}
+
+void ScrollPanel::XOnMouseWheelInside(int localx, int localy, int d)
+{
+	if(!d)
+		return;
+	yScrollVel -= d*2;
+}
+
+void ScrollPanel::Draw(const Point& screenPos)
+{
+	Panel::Draw(screenPos);
+
+	Graphics * g = ui::Engine::Ref().g;
+
+	//Vertical scroll bar
+	if(maxOffset.Y>0 && InnerSize.Y>0)
+	{
+		float scrollHeight = float(Size.Y)*(float(Size.Y)/float(InnerSize.Y));
+		float scrollPos = 0;
+		if(-ViewportPosition.Y>0)
+		{
+			scrollPos = float(Size.Y-scrollHeight)*(float(offsetY)/float(maxOffset.Y));
+		}
+
+		g->fillrect(screenPos.X+(Size.X-scrollBarWidth), screenPos.Y, scrollBarWidth, Size.Y, 125, 125, 125, 100);
+		g->fillrect(screenPos.X+(Size.X-scrollBarWidth), screenPos.Y+scrollPos, scrollBarWidth, scrollHeight, 255, 255, 255, 255);
+	}
+}
+
+void ScrollPanel::XOnMouseClick(int x, int y, unsigned int button)
+{
+	if (isMouseInsideScrollbar)
+	{
+		scrollbarSelected = true;
+		scrollbarInitialYOffset = offsetY;
+		scrollbarInitialYClick = y;
+	}
+}
+
+void ScrollPanel::XOnMouseUp(int x, int y, unsigned int button)
+{
+	scrollbarSelected = false;
+}
+
+void ScrollPanel::XOnMouseMoved(int x, int y, int dx, int dy)
+{
+	if(maxOffset.Y>0 && InnerSize.Y>0)
+	{
+		float scrollHeight = float(Size.Y)*(float(Size.Y)/float(InnerSize.Y));
+		float scrollPos = 0;
+		if(-ViewportPosition.Y>0)
+		{
+			scrollPos = float(Size.Y-scrollHeight)*(float(offsetY)/float(maxOffset.Y));
+		}
+		
+		if (scrollbarSelected)
+		{
+			if (x > 0)
+			{
+				int scrollY = float(y-scrollbarInitialYClick)/float(Size.Y)*float(InnerSize.Y)+scrollbarInitialYOffset;
+				ViewportPosition.Y = -scrollY;
+				offsetY = scrollY;
+			}
+			else
+			{
+				ViewportPosition.Y = -scrollbarInitialYOffset;
+				offsetY = scrollbarInitialYOffset;
+			}
+		}
+
+		if (x > (Size.X-scrollBarWidth) && x < (Size.X-scrollBarWidth)+scrollBarWidth && y > scrollPos && y < scrollPos+scrollHeight)
+			isMouseInsideScrollbar = true;
+		else
+			isMouseInsideScrollbar = false;
+	}
+}
+
+void ScrollPanel::XTick(float dt)
+{
+	//if(yScrollVel > 7.0f) yScrollVel = 7.0f;
+	//if(yScrollVel < -7.0f) yScrollVel = -7.0f;
+	if(yScrollVel > -0.5f && yScrollVel < 0.5)
+		yScrollVel = 0;
+
+	if(xScrollVel > 7.0f) xScrollVel = 7.0f;
+	if(xScrollVel < -7.0f) xScrollVel = -7.0f;
+	if(xScrollVel > -0.5f && xScrollVel < 0.5)
+		xScrollVel = 0;
+
+	maxOffset = InnerSize-Size;
+	maxOffset.Y = std::max(0, maxOffset.Y);
+	maxOffset.X = std::max(0, maxOffset.X);
+
+	int oldOffsetY = offsetY;
+	offsetY += yScrollVel;
+	int oldOffsetX = offsetX;
+	offsetX += xScrollVel;
+
+	yScrollVel*=0.98f;
+	xScrollVel*=0.98f;
+
+	if(oldOffsetY!=int(offsetY))
+	{
+		if(offsetY<0)
+		{
+			offsetY = 0;
+			yScrollVel = 0;
+			//commentsBegin = true;
+			//commentsEnd = false;
+		}
+		else if(offsetY>maxOffset.Y)
+		{
+			offsetY = maxOffset.Y;
+			yScrollVel = 0;
+			//commentsEnd = true;
+			//commentsBegin = false;
+		}
+		else
+		{
+			//commentsEnd = false;
+			//commentsBegin = false;
+		}
+		ViewportPosition.Y = -offsetY;
+	}
+	else
+	{
+		if(offsetY<0)
+		{
+			offsetY = 0;
+			yScrollVel = 0;
+			ViewportPosition.Y = -offsetY;
+		}
+		else if(offsetY>maxOffset.Y)
+		{
+			offsetY = maxOffset.Y;
+			ViewportPosition.Y = -offsetY;
+		}
+	}
+
+	if(mouseInside && scrollBarWidth < 6)
+		scrollBarWidth++;
+	else if(!mouseInside && scrollBarWidth > 0 && !scrollbarSelected)
+		scrollBarWidth--;
+}
+\ No newline at end of file