/**
* Copyright (c) 2008-2012 Ardor Labs, Inc.
*
* This file is part of Ardor3D.
*
* Ardor3D is free software: you can redistribute it and/or modify it
* under the terms of its license which may be found in the accompanying
* LICENSE file or at <http://www.ardor3d.com/LICENSE>.
*/
package com.ardor3d.extension.ui.text;
import com.ardor3d.extension.ui.UIComponent;
import com.ardor3d.math.ColorRGBA;
import com.ardor3d.math.Transform;
import com.ardor3d.math.Vector3;
import com.ardor3d.math.type.ReadOnlyColorRGBA;
import com.ardor3d.renderer.IndexMode;
import com.ardor3d.renderer.Renderer;
import com.ardor3d.scenegraph.Mesh;
import com.ardor3d.scenegraph.MeshData;
import com.ardor3d.util.geom.BufferUtils;
public class TextCaret {
private long _blinkInterval = 500; // ms
private long _lastBlink = 0;
private boolean _show = true;
private int _posX, _posY;
private int _index;
private final Mesh _strip = new Mesh();
/**
* Construct a new TextCaret
*/
public TextCaret() {
final MeshData md = _strip.getMeshData();
md.setVertexBuffer(BufferUtils.createVector3Buffer(4));
md.setIndices(BufferUtils.createIndexBufferData(new int[] { 0, 1, 3, 2 }, 3));
md.setIndexMode(IndexMode.TriangleStrip);
final float[] vals = new float[] { 0, 0, 0, //
1, 0, 0, //
1, 1, 0, //
0, 1, 0 //
};
md.getVertexBuffer().put(vals);
_strip.updateGeometricState(0);
setCaretColor(ColorRGBA.BLACK);
}
public boolean isShowing() {
final long curr = System.currentTimeMillis();
if (curr - _lastBlink > _blinkInterval) {
_lastBlink = curr;
_show = !_show;
}
return _show;
}
public void draw(final Renderer renderer, final UIComponent comp, final int height, final double xOffset,
final double yOffset) {
final long curr = System.currentTimeMillis();
if (curr - _lastBlink > _blinkInterval) {
_lastBlink = curr;
_show = !_show;
comp.fireComponentDirty();
}
if (!_show) {
return;
}
final Vector3 v = Vector3.fetchTempInstance();
v.set(getPosX() + xOffset, getPosY() + yOffset, 0);
final Transform t = Transform.fetchTempInstance();
t.set(comp.getWorldTransform());
t.applyForwardVector(v);
t.translate(v);
Vector3.releaseTempInstance(v);
_strip.setWorldTransform(t);
Transform.releaseTempInstance(t);
_strip.setWorldScale(1, _strip.getWorldScale().getY() * height, 0);
_strip.render(renderer);
}
public long getBlinkInterval() {
return _blinkInterval;
}
public void setBlinkInterval(final long ms) {
_blinkInterval = ms;
}
public ReadOnlyColorRGBA getCaretColor() {
return _strip.getDefaultColor();
}
public void setCaretColor(final ReadOnlyColorRGBA caretColor) {
_strip.setDefaultColor(caretColor);
}
public int getIndex() {
return _index;
}
public void setIndex(final int index) {
_index = index;
}
public int getPosX() {
return _posX;
}
public void setPosX(final int posX) {
_posX = posX;
}
public int getPosY() {
return _posY;
}
public void setPosY(final int posY) {
_posY = posY;
}
}