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#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)
{
}
int ScrollPanel::GetScrollLimit()
{
if(maxOffset.Y == -ViewportPosition.Y)
return 1;
else if(ViewportPosition.Y == 0)
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::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)
scrollBarWidth--;
}
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