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package binnie.craftgui.controls.scroll;
import binnie.craftgui.controls.core.Control;
import binnie.craftgui.core.IWidget;
import binnie.craftgui.core.geometry.IArea;
import binnie.craftgui.core.geometry.IPoint;
import binnie.craftgui.events.EventMouse.Wheel;
import binnie.craftgui.events.EventMouse.Wheel.Handler;
import binnie.craftgui.events.EventWidget.ChangeSize;
import binnie.craftgui.events.EventWidget.ChangeSize.Handler;
public class ControlScrollableContent<T extends IWidget>
extends Control
implements IControlScrollable
{
protected T controlChild;
protected float scrollBarSize;
public ControlScrollableContent(IWidget parent, float x, float y, float w, float h, float scrollBarSize)
{
super(parent, x, y, w, h);
if (scrollBarSize != 0.0F) {
new ControlScroll(this, getSize().x() - scrollBarSize, 0.0F, scrollBarSize, getSize().y(), this);
}
addEventHandler(new EventMouse.Wheel.Handler()
{
public void onEvent(EventMouse.Wheel event)
{
if ((ControlScrollableContent.this.getRelativeMousePosition().x() > 0.0F) && (ControlScrollableContent.this.getRelativeMousePosition().y() > 0.0F) && (ControlScrollableContent.this.getRelativeMousePosition().x() < ControlScrollableContent.this.getSize().x()) && (ControlScrollableContent.this.getRelativeMousePosition().y() < ControlScrollableContent.this.getSize().y()))
{
if (ControlScrollableContent.this.getMovementRange() == 0.0F) {
return;
}
float percentageMove = 0.8F / ControlScrollableContent.this.getMovementRange();
ControlScrollableContent.this.movePercentage(percentageMove * -event.getDWheel());
}
}
});
this.scrollBarSize = scrollBarSize;
}
public void setScrollableContent(T child)
{
this.controlChild = child;
if (child == null) {
return;
}
child.setCroppedZone(this, new IArea(1.0F, 1.0F, getSize().x() - 2.0F - this.scrollBarSize, getSize().y() - 2.0F));
child.addSelfEventHandler(new EventWidget.ChangeSize.Handler()
{
public void onEvent(EventWidget.ChangeSize event)
{
ControlScrollableContent.this.controlChild.setOffset(new IPoint(0.0F, -ControlScrollableContent.this.percentageIndex * ControlScrollableContent.this.getMovementRange()));
if (ControlScrollableContent.this.getMovementRange() == 0.0F) {
ControlScrollableContent.this.percentageIndex = 0.0F;
}
}
});
}
public T getContent()
{
return this.controlChild;
}
public float getPercentageShown()
{
if ((this.controlChild == null) || (this.controlChild.getSize().y() == 0.0F)) {
return 1.0F;
}
float shown = getSize().y() / this.controlChild.getSize().y();
return Math.min(shown, 1.0F);
}
float percentageIndex = 0.0F;
public float getPercentageIndex()
{
return this.percentageIndex;
}
public void movePercentage(float percentage)
{
if (this.controlChild == null) {
return;
}
this.percentageIndex += percentage;
if (this.percentageIndex > 1.0F) {
this.percentageIndex = 1.0F;
} else if (this.percentageIndex < 0.0F) {
this.percentageIndex = 0.0F;
}
if (getMovementRange() == 0.0F) {
this.percentageIndex = 0.0F;
}
this.controlChild.setOffset(new IPoint(0.0F, -this.percentageIndex * getMovementRange()));
}
public void setPercentageIndex(float index)
{
movePercentage(index - this.percentageIndex);
}
public float getMovementRange()
{
if (this.controlChild == null) {
return 0.0F;
}
float range = this.controlChild.getSize().y() - getSize().y();
return Math.max(range, 0.0F);
}
public void onUpdateClient()
{
setPercentageIndex(getPercentageIndex());
}
public void ensureVisible(float minY, float maxY, float totalY)
{
minY /= totalY;
maxY /= totalY;
float shownPercentage = getPercentageShown();
float percentageIndex = getPercentageIndex();
float minPercent = (1.0F - shownPercentage) * percentageIndex;
float maxPercent = minPercent + shownPercentage;
if (maxY > maxPercent) {
setPercentageIndex((maxY - shownPercentage) / (1.0F - shownPercentage));
}
if (minY < minPercent) {
setPercentageIndex(minY / (1.0F - shownPercentage));
}
}
}
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