public static int getMinimumWidth(IFigure figure) {
if (figure instanceof FlowPage) {
FlowPage fp = (FlowPage) figure;
TextFlow tf = (TextFlow) fp.getChildren().get(0);
List<?> fragments = tf.getFragments();
int width = getLongestFragment(fragments) + figure.getBorder().getInsets(figure).getWidth();
return width;
} else {
return figure.getBounds().width;
}
}
/**
* Calculate the best size for this label using the class's width to height ratio. This is done by
* calculating the area that the text would occupy if it was in only one line, then calculate a
* new width that would give the same area using the width to height ratio, and finally it sends
* this width to the {@link FlowPage}'s {@link FlowPage#getPreferredSize(int, int)} method which
* calculates the real height using line breaks.
*
* @return A close match to the size that this figure should have to match the required width to
* height ratio.
*/
public Dimension calculateSize() {
try {
Dimension lineDimensions =
TextUtilities.INSTANCE.getStringExtents(textFlow.getText(), getFont());
double area = lineDimensions.width() * lineDimensions.height();
double width = Math.sqrt(area / ratio) * ratio;
invalidate();
Dimension pSize = textFlow.getPreferredSize((int) width, -1).getCopy();
if (pSize.width < OPPFigureConstants.MINIMUM_NODE_SIZE) pSize.width = pSize.height;
return pSize;
} catch (Exception e) {
return new Dimension(0, 0);
}
}
public static int getMinimumHeight(IFigure figure) {
int height = figure.getBounds().height;
if (figure instanceof FlowPage) {
FlowPage fp = (FlowPage) figure;
TextFlow tf = (TextFlow) fp.getChildren().get(0);
Dimension textExtents = TextUtilities.INSTANCE.getTextExtents(tf.getText(), tf.getFont());
List<?> fragments = tf.getFragments();
if (fragments.size() != 0) {
height = fragments.size() * textExtents.height;
// include border padding
height = height + figure.getBorder().getInsets(figure).getHeight();
}
}
return height;
}
/**
* Create a new smart label with the given width to height ratio (width = ratio * height)
*
* @param ratio ratio to use when calculating the smart size of the label.
*/
public SmartLabelFigure(double ratio) {
super();
this.ratio = ratio;
textFlow = new TextFlow();
textFlow.setLayoutManager(
new ParagraphTextLayout(textFlow, ParagraphTextLayout.WORD_WRAP_HARD));
add(textFlow);
setHorizontalAligment(PositionConstants.CENTER);
}
@Override
protected void setUI() {
setLayoutManager(new GridLayout());
FlowPage flowPage = new FlowPage();
BlockFlow block = new BlockFlow();
fTextFlow = new TextFlow();
fTextFlow.setLayoutManager(
new ParagraphTextLayout(fTextFlow, ParagraphTextLayout.WORD_WRAP_HARD));
block.add(fTextFlow);
flowPage.add(block);
add(flowPage, new GridData(SWT.CENTER, SWT.CENTER, true, true));
fTextPositionDelegate = new TextPositionDelegate(this, flowPage, getDiagramModelObject());
fIconicDelegate = new IconicDelegate(getDiagramModelObject());
fIconicDelegate.updateImage();
}
public void refreshVisuals() {
// Text
setText();
// Font
setFont();
// Fill Color
setFillColor();
// Font Color
setFontColor();
// Border Color
setBorderColor();
// Text Alignment
((BlockFlow) fTextFlow.getParent())
.setHorizontalAligment(getDiagramModelObject().getTextAlignment());
// Text Position
fTextPositionDelegate.updateTextPosition();
}
public String getText() {
return textFlow.getText();
}
public void setText(String text) {
textFlow.setText(text);
}