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/*
* Copyright 2012 AndroidPlot.com
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.androidplot.ui.widget;
import android.graphics.*;
import android.util.Log;
import com.androidplot.ui.*;
import com.androidplot.util.FontUtils;
public class TextLabelWidget extends Widget {
private static final String TAG = TextLabelWidget.class.getName();
private String text;
private Paint labelPaint;
private TextOrientationType orientation;
private boolean autoPackEnabled = true;
{
labelPaint = new Paint();
labelPaint.setColor(Color.WHITE);
labelPaint.setAntiAlias(true);
labelPaint.setTextAlign(Paint.Align.CENTER);
}
public TextLabelWidget(LayoutManager layoutManager, SizeMetrics sizeMetrics) {
this(layoutManager, sizeMetrics, TextOrientationType.HORIZONTAL);
}
public TextLabelWidget(LayoutManager layoutManager, String title, SizeMetrics sizeMetrics, TextOrientationType orientation) {
this(layoutManager, sizeMetrics, orientation);
setText(title);
}
public TextLabelWidget(LayoutManager layoutManager, SizeMetrics sizeMetrics, TextOrientationType orientation) {
super(layoutManager, new SizeMetrics(0, SizeLayoutType.ABSOLUTE, 0, SizeLayoutType.ABSOLUTE));
//this.plot = plot;
//this.setWidth(labelPaint.measureText(plot.getTitle()));
//this.setHeight(labelPaint.getFontMetrics().top);
setSize(sizeMetrics);
this.orientation = orientation;
}
@Override
protected void onMetricsChanged(SizeMetrics olds, SizeMetrics news) {
if(autoPackEnabled) {
pack();
}
}
@Override
public void onPostInit() {
if(autoPackEnabled) {
pack();
}
}
//protected abstract String getText();
/**
* Sets the dimensions of the widget to exactly contain the text contents
*/
public void pack() {
Log.d(TAG, "Packing...");
Rect size = FontUtils.getStringDimensions(text, getLabelPaint());
if(size == null) {
Log.w(TAG, "Attempt to pack empty text.");
return;
}
switch(orientation) {
case HORIZONTAL:
setSize(new SizeMetrics(size.height(), SizeLayoutType.ABSOLUTE, size.width()+2, SizeLayoutType.ABSOLUTE));
break;
case VERTICAL_ASCENDING:
case VERTICAL_DESCENDING:
setSize(new SizeMetrics(size.width(), SizeLayoutType.ABSOLUTE, size.height()+2, SizeLayoutType.ABSOLUTE));
break;
}
refreshLayout();
}
/**
* Do not call this method directly. It is indirectly invoked every time a plot is
* redrawn.
* @param canvas The Canvas to draw onto
* @param widgetRect the size and coordinates of this widget
*/
@Override
public void doOnDraw(Canvas canvas, RectF widgetRect) {
if(text == null || text.length() == 0) {
return;
}
//FontUtils.getStringDimensions(text, labelPaint);
float vOffset = labelPaint.getFontMetrics().descent;
PointF start = getAnchorCoordinates(widgetRect,
AnchorPosition.CENTER);
// BEGIN ROTATION CALCULATION
//int canvasState = canvas.save(Canvas.ALL_SAVE_FLAG);
try {
canvas.save();
canvas.translate(start.x, start.y);
switch (orientation) {
case HORIZONTAL:
break;
case VERTICAL_ASCENDING:
canvas.rotate(-90);
break;
case VERTICAL_DESCENDING:
canvas.rotate(90);
break;
default:
throw new UnsupportedOperationException("Orientation " + orientation + " not yet implemented for TextLabelWidget.");
}
canvas.drawText(text, 0, vOffset, labelPaint);
} finally {
//canvas.restoreToCount(canvasState);
canvas.restore();
}
// END ROTATION CALCULATION
}
public Paint getLabelPaint() {
return labelPaint;
}
public void setLabelPaint(Paint labelPaint) {
this.labelPaint = labelPaint;
// when paint changes, packing params change too so check
// to see if we need to resize:
if(autoPackEnabled) {
pack();
}
}
public TextOrientationType getOrientation() {
return orientation;
}
public void setOrientation(TextOrientationType orientation) {
this.orientation = orientation;
if(autoPackEnabled) {
pack();
}
}
public boolean isAutoPackEnabled() {
return autoPackEnabled;
}
public void setAutoPackEnabled(boolean autoPackEnabled) {
this.autoPackEnabled = autoPackEnabled;
if(autoPackEnabled) {
pack();
}
}
public void setText(String text) {
Log.d(TAG, "Setting textLabel to: " + text);
this.text = text;
if(autoPackEnabled) {
pack();
}
}
public String getText() {
return text;
}
}
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