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Merge pull request #553 from eclipse/bugfix/Issue_550_Open_the_Nebula…
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…Slider_to_allow_user_extension

Bug #550 - Open the NebulaSlider to allow user extension
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@lcaron
lcaron authored Jan 22, 2024
2 parents 0dae8b8 + a31c93c commit 879f570
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Showing 6 changed files with 501 additions and 102 deletions.
128 changes: 128 additions & 0 deletions ...src/org/eclipse/nebula/widgets/opal/nebulaslider/snippets/NebulaCustomSliderRenderer.java
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package org.eclipse.nebula.widgets.opal.nebulaslider.snippets;

import org.eclipse.nebula.widgets.opal.nebulaslider.NebulaSlider;
import org.eclipse.nebula.widgets.opal.nebulaslider.NebularDefaultSliderRenderer;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.graphics.Font;
import org.eclipse.swt.graphics.FontData;

public class NebulaCustomSliderRenderer extends NebularDefaultSliderRenderer {

public NebulaCustomSliderRenderer(final NebulaSlider parentSlider) {
super(parentSlider);
}

/**
* @see org.eclipse.nebula.widgets.opal.nebulaslider.NebularDefaultSliderRenderer#getBarInsideColor()
*/
@Override
public Color getBarInsideColor() {
return getAndDisposeColor(231, 225, 219);
}

/**
* @see org.eclipse.nebula.widgets.opal.nebulaslider.NebularDefaultSliderRenderer#getBarBorderColor()
*/
@Override
public Color getBarBorderColor() {
return getAndDisposeColor(219, 211, 203);
}

/**
* @see org.eclipse.nebula.widgets.opal.nebulaslider.NebularDefaultSliderRenderer#getBarSelectionColor()
*/
@Override
public Color getBarSelectionColor() {
return getAndDisposeColor(129, 108, 91);
}

/**
* @see org.eclipse.nebula.widgets.opal.nebulaslider.NebularDefaultSliderRenderer#getSelectorColor()
*/
@Override
public Color getSelectorColor() {
return getAndDisposeColor(148, 130, 113);
}

/**
* @see org.eclipse.nebula.widgets.opal.nebulaslider.NebularDefaultSliderRenderer#getSelectorColorBorder()
*/
@Override
public Color getSelectorColorBorder() {
return getAndDisposeColor(238, 234, 230);
}

/**
* @see org.eclipse.nebula.widgets.opal.nebulaslider.NebularDefaultSliderRenderer#getSelectorTextColor()
*/
@Override
public Color getSelectorTextColor() {
return getAndDisposeColor(255, 255, 204);
}

/**
* @see org.eclipse.nebula.widgets.opal.nebulaslider.NebularDefaultSliderRenderer#getArrowColor()
*/
@Override
public Color getArrowColor() {
return getAndDisposeColor(203, 192, 181);
}

/**
* @see org.eclipse.nebula.widgets.opal.nebulaslider.NebularDefaultSliderRenderer#getTextFont()
*/
@Override
public Font getTextFont() {
final FontData fontData = parentSlider.getFont().getFontData()[0];
final Font newFont = new Font(parentSlider.getDisplay(), "Arial", Math.max(fontData.getHeight(), 14), SWT.ITALIC);
parentSlider.addDisposeListener(e -> {
if (!newFont.isDisposed()) {
newFont.dispose();
}
});
return newFont;
}

/**
* @see org.eclipse.nebula.widgets.opal.nebulaslider.NebularDefaultSliderRenderer#getHorizontalMargin()
*/
@Override
public int getHorizontalMargin() {
// TODO Auto-generated method stub
return super.getHorizontalMargin();
}

/**
* @see org.eclipse.nebula.widgets.opal.nebulaslider.NebularDefaultSliderRenderer#getSelectorWidth()
*/
@Override
public int getSelectorWidth() {
return 100;
}

/**
* @see org.eclipse.nebula.widgets.opal.nebulaslider.NebularDefaultSliderRenderer#getSelectorHeight()
*/
@Override
public int getSelectorHeight() {
return 40;
}

/**
* @see org.eclipse.nebula.widgets.opal.nebulaslider.NebularDefaultSliderRenderer#getBarHeight()
*/
@Override
public int getBarHeight() {
return 18;
}

/**
* @see org.eclipse.nebula.widgets.opal.nebulaslider.NebularDefaultSliderRenderer#getArrowLineWidth()
*/
@Override
public int getArrowLineWidth() {
return 5;
}

}
15 changes: 5 additions & 10 deletions ...ippets/src/org/eclipse/nebula/widgets/opal/nebulaslider/snippets/NebulaSliderSnippet.java
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Expand Up @@ -4,7 +4,7 @@
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors: Laurent CARON ([email protected])
Expand All @@ -13,8 +13,6 @@

import org.eclipse.nebula.widgets.opal.nebulaslider.NebulaSlider;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
Expand Down Expand Up @@ -53,11 +51,8 @@ public static void main(final String[] args) {
slider.setValue(632);
slider.setBackground(display.getSystemColor(SWT.COLOR_WHITE));

slider.addSelectionListener(new SelectionAdapter() {
@Override
public void widgetSelected(SelectionEvent e) {
System.out.println("New value is " + slider.getValue());
}
slider.addListener(SWT.Selection, e -> {
System.out.println("New value is " + slider.getValue());
});

final GridData layoutData = new GridData(GridData.FILL, GridData.CENTER, true, false, 2, 1);
Expand Down Expand Up @@ -116,14 +111,14 @@ public void widgetSelected(SelectionEvent e) {
display.dispose();
}

private static void createLeftLabel(Shell shell, String text) {
private static void createLeftLabel(final Shell shell, final String text) {
final Label lbl = new Label(shell, SWT.NONE);
lbl.setText(text);
lbl.setBackground(shell.getDisplay().getSystemColor(SWT.COLOR_WHITE));
lbl.setLayoutData(new GridData(GridData.END, GridData.CENTER, false, false));
}

private static Text createTextWidget(Shell shell, int value) {
private static Text createTextWidget(final Shell shell, final int value) {
final Text txt = new Text(shell, SWT.BORDER);
txt.setText(String.valueOf(value));
txt.setTextLimit(3);
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138 changes: 138 additions & 0 deletions ...g/eclipse/nebula/widgets/opal/nebulaslider/snippets/NebulaSliderSnippetOtherRenderer.java
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/*******************************************************************************
* Copyright (c) 2011 Laurent CARON.
* This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors: Laurent CARON ([email protected])
*******************************************************************************/
package org.eclipse.nebula.widgets.opal.nebulaslider.snippets;

import org.eclipse.nebula.widgets.opal.nebulaslider.NebulaSlider;
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.MessageBox;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Text;

/**
* A simple snippet for the TextAssist Widget
*/
public class NebulaSliderSnippetOtherRenderer {
public static void main(final String[] args) {
final Display display = new Display();
final Shell shell = new Shell(display);
shell.setLayout(new GridLayout(2, false));
shell.setBackground(display.getSystemColor(SWT.COLOR_WHITE));

createLeftLabel(shell, "Minimum");
final Text min = createTextWidget(shell, 0);

createLeftLabel(shell, "Maximum");
final Text max = createTextWidget(shell, 1000);

createLeftLabel(shell, "Value");
final Text value = createTextWidget(shell, 632);

final Button update = new Button(shell, SWT.PUSH);
update.setLayoutData(new GridData(GridData.END, GridData.CENTER, false, false, 2, 1));
update.setText("Redraw Slider");

final NebulaSlider slider = new NebulaSlider(shell, SWT.NONE);
slider.setMinimum(0);
slider.setMaximum(1000);
slider.setValue(632);
slider.setRenderer(new NebulaCustomSliderRenderer(slider));
slider.setBackground(display.getSystemColor(SWT.COLOR_WHITE));

slider.addListener(SWT.Selection, e -> {
System.out.println("New value is " + slider.getValue());
});

final GridData layoutData = new GridData(GridData.FILL, GridData.CENTER, true, false, 2, 1);
layoutData.widthHint = 600;
layoutData.heightHint = 50;
slider.setLayoutData(layoutData);

update.addListener(SWT.Selection, e -> {
int minValue = 0;
try {
minValue = Integer.valueOf(min.getText());
} catch (final NumberFormatException nfe) {
showError(shell, "The value [" + min.getText() + "] is not a number");
return;
}

int maxValue = 0;
try {
maxValue = Integer.valueOf(max.getText());
} catch (final NumberFormatException nfe) {
showError(shell, "The value [" + max.getText() + "] is not a number");
return;
}

if (maxValue < minValue) {
showError(shell, "The minimum is greater than the maximum");
return;
}
//
int newValue = 0;
try {
newValue = Integer.valueOf(value.getText());
} catch (final NumberFormatException nfe) {
showError(shell, "The value [" + value.getText() + "] is not a number");
return;
}
if (newValue < minValue || newValue > maxValue) {
showError(shell, "The value [" + newValue + "] should be between " + minValue + " and " + maxValue);
return;
}
//
slider.setMinimum(minValue);
slider.setMaximum(maxValue);
slider.setValue(newValue);

});

shell.pack();
shell.open();

while (!shell.isDisposed()) {
if (!display.readAndDispatch()) {
display.sleep();
}
}
display.dispose();
}

private static void createLeftLabel(final Shell shell, final String text) {
final Label lbl = new Label(shell, SWT.NONE);
lbl.setText(text);
lbl.setBackground(shell.getDisplay().getSystemColor(SWT.COLOR_WHITE));
lbl.setLayoutData(new GridData(GridData.END, GridData.CENTER, false, false));
}

private static Text createTextWidget(final Shell shell, final int value) {
final Text txt = new Text(shell, SWT.BORDER);
txt.setText(String.valueOf(value));
txt.setTextLimit(3);
final GridData gd = new GridData(GridData.FILL, GridData.CENTER, false, false);
gd.minimumWidth = 40;
txt.setLayoutData(gd);
return txt;
}

private static void showError(final Shell shell, final String message) {
final MessageBox mb = new MessageBox(shell, SWT.ICON_ERROR | SWT.OK);
mb.setText("Error");
mb.setMessage(message);
mb.open();
}
}
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