com.ardor3d.extension.ui.AbstractLabelUIComponent Maven / Gradle / Ivy
/**
* 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 .
*/
package com.ardor3d.extension.ui;
import com.ardor3d.extension.ui.text.RenderedText;
import com.ardor3d.extension.ui.text.TextFactory;
import com.ardor3d.extension.ui.util.Alignment;
import com.ardor3d.extension.ui.util.Dimension;
import com.ardor3d.extension.ui.util.SubTex;
import com.ardor3d.extension.ui.util.SubTexUtil;
import com.ardor3d.math.Transform;
import com.ardor3d.math.Vector3;
import com.ardor3d.renderer.Renderer;
/**
* A state component containing a text label and an icon. These are separated by an optional gap and can also be given a
* specific alignment. By default, the text is aligned LEFT and has no icon or gap.
*/
public abstract class AbstractLabelUIComponent extends StateBasedUIComponent implements Textable {
/** Distance between text and icon if both are present. */
private int _gap = 0;
/** Alignment value to use to position the icon/text within the overall dimensions of this component. */
private Alignment _alignment = Alignment.LEFT;
/** The icon the draw on this icon. */
private SubTex _icon = null;
/** The size to draw our icon at. */
private final Dimension _iconDimensions = new Dimension();
/** The text object to use for drawing label text. */
private RenderedText _uiText;
/** If true, our text could be marked up with style information. */
protected boolean _styled = false;
@Override
public void updateMinimumSizeFromContents() {
int width = 0;
int height = 0;
final String textVal = getText();
if (textVal != null && textVal.length() > 0) {
width += Math.round(_uiText.getWidth());
height += Math.round(_uiText.getHeight());
}
if (_iconDimensions != null) {
width += _iconDimensions.getWidth();
if (textVal != null && textVal.length() > 0) {
width += _gap;
}
height = Math.max(_iconDimensions.getHeight(), height);
}
setMinimumContentSize(width, height);
if (getContentWidth() < width) {
setContentWidth(width);
}
if (getContentHeight() < height) {
setContentHeight(height);
}
fireComponentDirty();
}
/**
* @return the currently set text value of this label.
*/
public String getText() {
return _uiText != null ? _uiText.getText() : null;
}
/**
* Set the text for this component. Also updates the minimum size of the component.
*
* @param text
* the new text
*/
public void setText(String text) {
if (text != null && text.length() == 0) {
text = null;
}
if (text != null) {
_uiText = TextFactory.INSTANCE.generateText(text, isStyledText(), getFontStyles(), _uiText, -1);
} else {
_uiText = null;
}
updateMinimumSizeFromContents();
}
public boolean isStyledText() {
return _styled;
}
public void setStyledText(final boolean value) {
_styled = value;
fireStyleChanged();
fireComponentDirty();
}
@Override
protected void updateChildren(final double time) {
super.updateChildren(time);
if (_uiText != null) {
_uiText.updateGeometricState(time);
}
}
public Alignment getAlignment() {
return _alignment;
}
public void setAlignment(final Alignment alignment) {
_alignment = alignment;
}
public int getGap() {
return _gap;
}
/**
* Note: Also updates the minimum size of the component.
*
* @param gap
* the size of the gap, in pixels, between the text and the label text. This is only used if both icon
* and text are set.
*/
public void setGap(final int gap) {
_gap = gap;
updateMinimumSizeFromContents();
}
public SubTex getIcon() {
return _icon;
}
/**
* Note: Also updates the minimum size of the component.
*
* @param icon
* the new icon for this label.
*/
public void setIcon(final SubTex icon) {
_icon = icon;
if (icon != null && _iconDimensions.getHeight() == 0 && _iconDimensions.getWidth() == 0) {
updateIconDimensionsFromIcon();
}
updateMinimumSizeFromContents();
}
/**
* Set the icon dimensions from the currently set icon. If no icon is set, the dimensions are set to 0x0.
*/
public void updateIconDimensionsFromIcon() {
if (_icon != null) {
_iconDimensions.set(_icon.getWidth(), _icon.getHeight());
} else {
_iconDimensions.set(0, 0);
}
updateMinimumSizeFromContents();
}
/**
* Overrides any currently set icon size. Call this after setting the icon to prevent overriding.
*
* @param dimensions
* a new icon size.
*/
public void setIconDimensions(final Dimension dimensions) {
_iconDimensions.set(dimensions);
updateMinimumSizeFromContents();
}
public Dimension getIconDimensions() {
return _iconDimensions;
}
@Override
public void fireStyleChanged() {
super.fireStyleChanged();
setText(getText());
}
@Override
protected void drawComponent(final Renderer renderer) {
double x = 0;
double y = 0;
int width = 0;
final boolean hasTextObject = getText() != null;
// Gather our width... check for icon and text and gap.
if (_icon != null) {
width = _iconDimensions.getWidth();
if (hasTextObject && getText().length() > 0) {
width += _gap;
}
} else if (!hasTextObject) {
// no text OR icon, so no content to render.
return;
}
if (hasTextObject) {
width += Math.round(_uiText.getWidth());
}
// find left most x location of content (icon+text) based on alignment.
x = _alignment.alignX(getContentWidth(), width);
if (_icon != null) {
// find bottom most y location of icon based on alignment.
// TODO: recheck for proper vertical alignment with new text impl
// if (hasTextObject && _uiText.getHeight() > _iconDimensions.getHeight()) {
// final int trailing = _uiText.getFont().getLineHeight() - _uiText.getFont().getBaseHeight();
// y = _alignment.alignY(getContentHeight() - trailing, _iconDimensions.getHeight()) + trailing - 1;
// } else {
y = _alignment.alignY(getContentHeight(), _iconDimensions.getHeight());
// }
final double dix = getTotalLeft();
final double diy = getTotalBottom();
// draw icon
SubTexUtil.drawSubTex(renderer, _icon, dix + x, diy + y, _iconDimensions.getWidth(), _iconDimensions
.getHeight(), getWorldTransform());
// shift X over by width of icon and gap
x += _iconDimensions.getWidth() + _gap;
}
if (hasTextObject) {
// find bottom most y location of text based on alignment.
y = _alignment.alignY(getContentHeight(), Math.round(_uiText.getHeight()));
// set our text location
final Vector3 v = Vector3.fetchTempInstance();
// note: we round to get the text pixel aligned... otherwise it can get blurry
v.set(Math.round(x + getTotalLeft()), Math.round(y + getTotalBottom()), 0);
final Transform t = Transform.fetchTempInstance();
t.set(getWorldTransform());
t.applyForwardVector(v);
t.translate(v);
Vector3.releaseTempInstance(v);
_uiText.setWorldTransform(t);
Transform.releaseTempInstance(t);
// TODO: alpha of text...
_uiText.render(renderer);
}
}
public RenderedText getTextObject() {
return _uiText;
}
}
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