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/*******************************************************************************
* Copyright (c) 2009 STMicroelectronics.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Marzia Maugeri <marzia.maugeri@st.com> - initial API and implementation
* Lev Ufimtsev <lufimtse@redhat.com> - added green/red progress bars
*******************************************************************************/
package org.eclipse.linuxtools.dataviewers.abstractviewers;
import java.text.NumberFormat;
import org.eclipse.linuxtools.dataviewers.listeners.ISpecialDrawerListener;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.graphics.GC;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Item;
import org.eclipse.swt.widgets.Table;
import org.eclipse.swt.widgets.Tree;
/**
* A field that implements a percentage drawer
*/
public abstract class AbstractPercentageDrawerField extends AbstractSTDataViewersField implements
ISpecialDrawerListener {
@Override
public ISpecialDrawerListener getSpecialDrawer(Object obj) {
return this;
}
@Override
public String getValue(Object obj) {
return getPercentage(obj) + "";
}
/**
* Gets the percentage value for the given object, as a float.
* Implementations must return values between 0 and 100.
*
* @param obj The object to retrieve percentage value for.
* @return A float value, between 0 and 100.
*/
public abstract float getPercentage(Object obj);
/**
* Percentage drawer.
*/
@Override
public void handleEvent(Event event) {
Item item = (Item) event.item;
Display display = event.widget.getDisplay();
int index = event.index;
int widthcol = 0;
if (event.widget instanceof Tree) {
Tree tree = (Tree) event.widget;
widthcol = tree.getColumn(index).getWidth();
} else { // event.widget instanceof Table
Table table = (Table) event.widget;
widthcol = table.getColumn(index).getWidth();
}
float d = getPercentage(item.getData());
int percent = (int) (d + 0.5);
GC gc = event.gc;
//--Define the size of the Progress bar.
int totalProgBarLength = (int) (widthcol * 0.3); //This makes it grow/shrink dynamically.
if (totalProgBarLength > 0) {
// ------------------------------------------------------
// ------------------- Draw Progress bar
// ------------------------------------------------------
// ---- Shared elements
int totalProgBarHeight = (int) (event.height * 0.5);
// --- Draw Green (covered) part
gc.setBackground(display.getSystemColor(SWT.COLOR_DARK_GREEN));
int progBarGreenWidth = (int) (totalProgBarLength * (percent * 0.01));
int progBarGreenHorizontalPos = event.x;
int progBarGreenHeight = (int) (event.height * 0.5);
int progBarGreenVerticalPos = event.y + (totalProgBarHeight / 2) + 1;
gc.fillRectangle(progBarGreenHorizontalPos, progBarGreenVerticalPos, progBarGreenWidth,
progBarGreenHeight);
// --- Draw Red (uncovered) Part
gc.setBackground(display.getSystemColor(SWT.COLOR_DARK_RED));
int progBarRedWidth = totalProgBarLength - progBarGreenWidth;
int progBarRedHorizontalPos = progBarGreenHorizontalPos + progBarGreenWidth;
int progBarRedHeight = progBarGreenHeight;
int progBarRedVerticalPos = progBarGreenVerticalPos;
gc.fillRectangle(progBarRedHorizontalPos, progBarRedVerticalPos, progBarRedWidth,
progBarRedHeight);
}
// ------------------------------------------------------
// ------------------- Draw text next to Progress bar
// ------------------------------------------------------
//------- Define the 'text' format. % text e.g 94.0%
String text = "%";
text = (isSettedNumberFormat() ? getNumberFormat().format(d) : d) + text;
Point size = gc.textExtent(text);
int offset = Math.max(0, (event.height - size.y) / 2);
//------- Position the text
Color foreground = gc.getForeground();
gc.setForeground(display.getSystemColor(SWT.COLOR_LIST_FOREGROUND));
//add offset of progress bar. (so that the text is to the right of the progress bar).
int progBarOffset = totalProgBarLength + (widthcol / 20); //(prog bar size) + (20th of column widht)
gc.drawText(text, event.x + progBarOffset, event.y + offset, true);
gc.setForeground(foreground);
}
public abstract NumberFormat getNumberFormat();
public abstract boolean isSettedNumberFormat();
}
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