/*
Part of the GUI library for Processing
http://www.lagers.org.uk/g4p/index.html
http://sourceforge.net/projects/g4p/files/?source=navbar
Copyright (c) 2012 Peter Lager
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General
Public License along with this library; if not, write to the
Free Software Foundation, Inc., 59 Temple Place, Suite 330,
Boston, MA 02111-1307 USA
*/
package automenta.vivisect.gui;
import automenta.vivisect.gui.StyledString.TextLayoutInfo;
import java.awt.Graphics2D;
import java.awt.font.TextLayout;
import java.util.LinkedList;
import processing.core.PApplet;
/**
* The label component.
*
* This control can display text with/without an icon.
*
* @author Peter Lager
*
*/
public class GLabel extends GTextIconAlignBase {
public GLabel(PApplet theApplet, float p0, float p1, float p2, float p3) {
this(theApplet, p0, p1, p2, p3, " ");
}
/**
* Create a label control.
*
* use setIcon to add an icon
*
* @param theApplet
* @param p0
* @param p1
* @param p2
* @param p3
* @param text
*/
public GLabel(PApplet theApplet, float p0, float p1, float p2, float p3, String text) {
super(theApplet, p0, p1, p2, p3);
setText(text);
opaque = false;
// Now register control with applet
registeredMethods = DRAW_METHOD;
GUI.addControl(this);
}
public void draw(){
if(!visible) return;
// Update buffer if invalid
updateBuffer();
winApp.pushStyle();
winApp.pushMatrix();
// Perform the rotation
applyTransform();
// Move matrix to line up with top-left corner
winApp.translate(-halfWidth, -halfHeight);
// Draw buffer
winApp.imageMode(PApplet.CORNER);
if(alphaLevel < 255)
winApp.tint(TINT_FOR_ALPHA, alphaLevel);
winApp.image(buffer, 0, 0);
winApp.popMatrix();
winApp.popStyle();
}
protected void updateBuffer(){
if(bufferInvalid) {
Graphics2D g2d = buffer.g2;
// Get the latest lines of text
LinkedList<TextLayoutInfo> lines = stext.getLines(g2d);
bufferInvalid = false;
buffer.beginDraw();
// Back ground colour
buffer.background(opaque ? palette[6] : palette[2] & 0xFFFFFF);
// Calculate text and icon placement
calcAlignment();
// If there is an icon draw it
if(iconW != 0)
buffer.image(bicon[0], siX, siY);
float wrapWidth = stext.getWrapWidth();
float sx = 0, tw = 0;
buffer.translate(stX, stY);
for(TextLayoutInfo lineInfo : lines){
TextLayout layout = lineInfo.layout;
buffer.translate(0, layout.getAscent());
switch(textAlignH){
case CENTER:
tw = layout.getVisibleAdvance();
tw = (tw > wrapWidth) ? tw - wrapWidth : tw;
sx = (wrapWidth - tw)/2;
break;
case RIGHT:
tw = layout.getVisibleAdvance();
tw = (tw > wrapWidth) ? tw - wrapWidth : tw;
sx = wrapWidth - tw;
break;
case LEFT:
case JUSTIFY:
default:
sx = 0;
}
// display text
g2d.setColor(jpalette[2]);
lineInfo.layout.draw(g2d, sx, 0);
buffer.translate(0, layout.getDescent() + layout.getLeading());
}
buffer.endDraw();
}
}
}