/**
* Returns the preview control for this field editor.
*
* @return the preview control
*/
public Control getPreviewControl() {
if (previewer == null) {
return null;
}
return previewer.getControl();
}
@Override
protected void doFillIntoGrid(Composite parent, int numColumns) {
getLabelControl(parent);
valueControl = getValueControl(parent);
GridData gd = new GridData(GridData.FILL_HORIZONTAL | GridData.GRAB_HORIZONTAL);
gd.horizontalSpan = numColumns - getNumberOfControls() + 1;
valueControl.setLayoutData(gd);
if (previewText != null) {
previewer = new DefaultPreviewer(previewText, parent);
gd = new GridData(GridData.FILL_HORIZONTAL);
gd.heightHint = previewer.getPreferredExtent();
gd.widthHint = previewer.getPreferredExtent();
previewer.getControl().setLayoutData(gd);
}
changeFontButton = getChangeControl(parent);
gd = new GridData();
int widthHint = convertHorizontalDLUsToPixels(changeFontButton, IDialogConstants.BUTTON_WIDTH);
gd.widthHint =
Math.max(widthHint, changeFontButton.computeSize(SWT.DEFAULT, SWT.DEFAULT, true).x);
changeFontButton.setLayoutData(gd);
}
/**
* Updates the change font button and the previewer to reflect the newly selected font.
*
* @param font The FontData[] to update with.
*/
private void updateFont(FontData font[]) {
FontData[] bestFont =
JFaceResources.getFontRegistry().filterData(font, valueControl.getDisplay());
// if we have nothing valid do as best we can
if (bestFont == null) {
bestFont = getDefaultFontData();
}
// Now cache this value in the receiver
this.chosenFont = bestFont;
if (valueControl != null) {
valueControl.setText(StringConverter.asString(chosenFont[0]));
}
if (previewer != null) {
previewer.setFont(bestFont);
}
}
/**
* Returns the preferred preview height.
*
* @return the height, or <code>-1</code> if no previewer is installed
*/
public int getPreferredPreviewHeight() {
if (previewer == null) {
return -1;
}
return previewer.getPreferredExtent();
}
@Override
protected void applyFont() {
if (chosenFont != null && previewer != null) {
previewer.setFont(chosenFont);
}
}
