/**
* 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;
}
@Override
protected void paintFigure(Graphics graphics) {
if (roiInfoProvider != null && roiDataBounds != null) {
String text =
roiInfoProvider.getROIInfo(
roiDataBounds.x, roiDataBounds.y, roiDataBounds.width, roiDataBounds.height);
Dimension size = TextUtilities.INSTANCE.getTextExtents(text, getFont());
graphics.pushState();
graphics.translate(getLocation());
graphics.fillRectangle(roiGeoBounds.x, roiGeoBounds.y - size.height, size.width, size.height);
graphics.drawText(text, roiGeoBounds.x, roiGeoBounds.y - size.height);
graphics.popState();
}
super.paintFigure(graphics);
}