Applied-Energistics-2-tiler.../client/gui/widgets/GuiScrollbar.java

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Java
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package appeng.client.gui.widgets;
import org.lwjgl.opengl.GL11;
import appeng.client.gui.AEBaseGui;
public class GuiScrollbar implements IScrollSource
{
private int displayX = 0;
private int displayY = 0;
private int width = 12;
private int height = 16;
private int pageSize = 1;
private int maxScroll = 0;
private int minScroll = 0;
private int currentScroll = 0;
private void applyRange()
{
currentScroll = Math.max( Math.min( currentScroll, maxScroll ), minScroll );
}
public void draw(AEBaseGui g)
{
g.bindTexture( "minecraft", "gui/container/creative_inventory/tabs.png" );
GL11.glColor4f( 1.0f, 1.0f, 1.0f, 1.0f );
if ( getRange() == 0 )
{
g.drawTexturedModalRect( displayX, displayY, 232 + width, 0, width, 15 );
}
else
{
int offset = (currentScroll - minScroll) * (height - 15) / getRange();
g.drawTexturedModalRect( displayX, offset + displayY, 232, 0, width, 15 );
}
}
public int getRange()
{
return maxScroll - minScroll;
}
public int getLeft()
{
return displayX;
}
public int getTop()
{
return displayY;
}
public int getWidth()
{
return width;
}
public int getHeight()
{
return height;
}
public GuiScrollbar setLeft(int v)
{
displayX = v;
return this;
}
public GuiScrollbar setTop(int v)
{
displayY = v;
return this;
}
public GuiScrollbar setWidth(int v)
{
width = v;
return this;
}
public GuiScrollbar setHeight(int v)
{
height = v;
return this;
}
public void setRange(int min, int max, int pageSize)
{
minScroll = min;
maxScroll = max;
this.pageSize = pageSize;
if ( minScroll > maxScroll )
maxScroll = minScroll;
applyRange();
}
@Override
public int getCurrentScroll()
{
return currentScroll;
}
public void click(AEBaseGui aeBaseGui, int x, int y)
{
if ( getRange() == 0 )
return;
if ( x > displayX && x <= displayX + width )
{
if ( y > displayY && y <= displayY + height )
{
currentScroll = (y - displayY);
currentScroll = minScroll + ((currentScroll * 2 * getRange() / height));
currentScroll = (currentScroll + 1) >> 1;
applyRange();
}
}
}
public void wheel(int delta)
{
delta = Math.max( Math.min( -delta, 1 ), -1 );
currentScroll += delta * pageSize;
applyRange();
}
}