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Support disabled state of slider #577

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merged 1 commit into from
Mar 18, 2024
Merged

Support disabled state of slider #577

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82 changes: 57 additions & 25 deletions ...a.widgets.nebulaslider/src/org/eclipse/nebula/widgets/opal/nebulaslider/NebulaSlider.java
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Original file line number Diff line number Diff line change
Expand Up @@ -19,6 +19,7 @@
import org.eclipse.swt.SWTException;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.events.SelectionListener;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.graphics.GC;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.graphics.Rectangle;
Expand Down Expand Up @@ -114,16 +115,16 @@ private void paintControl(final GC gc) {
// Compute xPosition
xPosition = computeXPosition();
}

drawBar(gc);
drawSelectionPart(gc);
drawSelector(gc);
boolean enabled = isEnabled();
drawBar(gc, enabled);
drawSelectionPart(gc, enabled);
drawSelector(gc, enabled);
}

private void drawBar(final GC gc) {
private void drawBar(final GC gc, boolean enabled) {
final Rectangle rect = getClientArea();
gc.setForeground(renderer.getBarBorderColor());
gc.setBackground(renderer.getBarInsideColor());
gc.setForeground(getColor(renderer.getBarBorderColor(), enabled));
gc.setBackground(getColor(renderer.getBarInsideColor(), enabled));

final int hMargin = renderer.getHorizontalMargin();
final int selectorWidth = renderer.getSelectorWidth();
Expand All @@ -137,10 +138,10 @@ private void drawBar(final GC gc) {
gc.drawRoundRectangle(x, y, width, barHeight, barHeight, barHeight);
}

private void drawSelectionPart(final GC gc) {
private void drawSelectionPart(final GC gc, boolean enabled) {
final Rectangle rect = getClientArea();
gc.setForeground(renderer.getBarBorderColor());
gc.setBackground(renderer.getBarSelectionColor());
gc.setForeground(getColor(renderer.getBarBorderColor(), enabled));
gc.setBackground(getColor(renderer.getBarSelectionColor(), enabled));

final int barHeight = renderer.getBarHeight();

Expand All @@ -158,10 +159,10 @@ private int computeXPosition() {
return position;
}

private void drawSelector(final GC gc) {
private void drawSelector(final GC gc, boolean enabled) {
final Rectangle rect = getClientArea();
gc.setForeground(renderer.getSelectorColorBorder());
gc.setBackground(renderer.getSelectorColor());
gc.setForeground(getColor(renderer.getSelectorColorBorder(), enabled));
gc.setBackground(getColor(renderer.getSelectorColor(), enabled));

final int hMargin = renderer.getHorizontalMargin();

Expand All @@ -175,7 +176,7 @@ private void drawSelector(final GC gc) {
gc.drawRoundRectangle(hMargin + xPosition, y, selectorWidth, selectorHeight, selectorHeight, selectorHeight);

// Draw the arrows
gc.setForeground(renderer.getArrowColor());
gc.setForeground(getColor(renderer.getArrowColor(), enabled));
gc.setLineWidth(renderer.getArrowLineWidth());
final int baseY = y + selectorHeight / 2;
gc.drawLine(hMargin + xPosition + 10, baseY, hMargin + xPosition + 17, baseY - 7);
Expand All @@ -185,7 +186,7 @@ private void drawSelector(final GC gc) {
gc.drawLine(hMargin + xPosition + selectorWidth - 10, baseY, hMargin + xPosition + selectorWidth - 17, baseY + 7);

// And the value
gc.setForeground(renderer.getSelectorTextColor());
gc.setForeground(getColor(renderer.getSelectorTextColor(), enabled));
gc.setFont(renderer.getTextFont());
final String valueAsString = stringValueOf(value);
final Point textSize = gc.textExtent(valueAsString);
Expand All @@ -196,6 +197,35 @@ private void drawSelector(final GC gc) {
gc.drawText(valueAsString, xText - textSize.x / 2, yText - textSize.y / 2, true);
}

@Override
public void setBounds(int x, int y, int width, int height) {
xPosition = -1;
super.setBounds(x, y, width, height);
}

@Override
public void setEnabled(boolean enabled) {
if(!enabled && moving) {
moving = false;
}
super.setEnabled(enabled);
}

private Color getColor(Color color, boolean enabled) {
if(enabled) {
return color;
}
// see https://en.wikipedia.org/wiki/Grayscale#Converting_color_to_grayscale
int red = color.getRed();
int green = color.getGreen();
int blue = color.getBlue();
if(red == green && green == blue) {
return color;
}
int g = (int)(0.299 * red + 0.587 * green + 0.114 * blue);
return new Color(g, g, g);
}

private String stringValueOf(int value) {
if(format != null) {
return format.apply(value);
Expand All @@ -222,17 +252,19 @@ public IntFunction<String> getLabelFormatProvider() {
private void addMouseListeners() {

addListener(SWT.MouseDown, e -> {
final int selectorWidth = renderer.getSelectorWidth();
final int selectorHeight = renderer.getSelectorHeight();

final int y = (getClientArea().height - selectorHeight) / 2;
final Rectangle rect = new Rectangle(xPosition + renderer.getHorizontalMargin(), y, selectorWidth, selectorHeight);
if (!rect.contains(e.x, e.y)) {
return;
if(isEnabled()) {
final int selectorWidth = renderer.getSelectorWidth();
final int selectorHeight = renderer.getSelectorHeight();

final int y = (getClientArea().height - selectorHeight) / 2;
final Rectangle rect = new Rectangle(xPosition + renderer.getHorizontalMargin(), y, selectorWidth, selectorHeight);
if (!rect.contains(e.x, e.y)) {
return;
}
moving = true;
movingValue = value;
mouseDeltaX = xPosition - e.x;
}
moving = true;
movingValue = value;
mouseDeltaX = xPosition - e.x;
});

addListener(SWT.MouseUp, e -> {
Expand Down
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