void drawRoiLabel(Graphics g, int index, Roi roi) {
Rectangle r = roi.getBounds();
int x = screenX(r.x);
int y = screenY(r.y);
double mag = getMagnification();
int width = (int) (r.width * mag);
int height = (int) (r.height * mag);
int size = width > 40 && height > 40 ? 12 : 9;
if (font != null) {
g.setFont(font);
size = font.getSize();
} else if (size == 12) g.setFont(largeFont);
else g.setFont(smallFont);
boolean drawingList = index >= LIST_OFFSET;
if (drawingList) index -= LIST_OFFSET;
String label = "" + (index + 1);
if (drawNames && roi.getName() != null) label = roi.getName();
FontMetrics metrics = g.getFontMetrics();
int w = metrics.stringWidth(label);
x = x + width / 2 - w / 2;
y = y + height / 2 + Math.max(size / 2, 6);
int h = metrics.getAscent() + metrics.getDescent();
if (bgColor != null) {
g.setColor(bgColor);
g.fillRoundRect(x - 1, y - h + 2, w + 1, h - 3, 5, 5);
}
if (!drawingList && labelRects != null && index < labelRects.length)
labelRects[index] = new Rectangle(x - 1, y - h + 2, w + 1, h);
g.setColor(labelColor);
g.drawString(label, x, y - 2);
g.setColor(defaultColor);
}
void showFrameRate(Graphics g) {
frames++;
if (System.currentTimeMillis() > firstFrame + 1000) {
firstFrame = System.currentTimeMillis();
fps = frames;
frames = 0;
}
g.setColor(Color.white);
g.fillRect(10, 12, 50, 15);
g.setColor(Color.black);
g.drawString((int) (fps + 0.5) + " fps", 10, 25);
}
void drawRoi(Graphics g, Roi roi, int index) {
int type = roi.getType();
ImagePlus imp2 = roi.getImage();
roi.setImage(imp);
Color saveColor = roi.getStrokeColor();
if (saveColor == null) roi.setStrokeColor(defaultColor);
if (roi instanceof TextRoi) ((TextRoi) roi).drawText(g);
else roi.drawOverlay(g);
roi.setStrokeColor(saveColor);
if (index >= 0) {
if (roi == currentRoi) g.setColor(Roi.getColor());
else g.setColor(defaultColor);
drawRoiLabel(g, index, roi);
}
if (imp2 != null) roi.setImage(imp2);
else roi.setImage(null);
}
// Use double buffer to reduce flicker when drawing complex ROIs.
// Author: Erik Meijering
void paintDoubleBuffered(Graphics g) {
final int srcRectWidthMag = (int) (srcRect.width * magnification);
final int srcRectHeightMag = (int) (srcRect.height * magnification);
if (offScreenImage == null
|| offScreenWidth != srcRectWidthMag
|| offScreenHeight != srcRectHeightMag) {
offScreenImage = createImage(srcRectWidthMag, srcRectHeightMag);
offScreenWidth = srcRectWidthMag;
offScreenHeight = srcRectHeightMag;
}
Roi roi = imp.getRoi();
try {
if (imageUpdated) {
imageUpdated = false;
imp.updateImage();
}
Graphics offScreenGraphics = offScreenImage.getGraphics();
Java2.setBilinearInterpolation(offScreenGraphics, Prefs.interpolateScaledImages);
Image img = imp.getImage();
if (img != null)
offScreenGraphics.drawImage(
img,
0,
0,
srcRectWidthMag,
srcRectHeightMag,
srcRect.x,
srcRect.y,
srcRect.x + srcRect.width,
srcRect.y + srcRect.height,
null);
if (overlay != null) drawOverlay(offScreenGraphics);
if (showAllROIs) drawAllROIs(offScreenGraphics);
if (roi != null) drawRoi(roi, offScreenGraphics);
if (srcRect.width < imageWidth || srcRect.height < imageHeight)
drawZoomIndicator(offScreenGraphics);
if (IJ.debugMode) showFrameRate(offScreenGraphics);
g.drawImage(offScreenImage, 0, 0, null);
} catch (OutOfMemoryError e) {
IJ.outOfMemory("Paint");
}
}
void drawZoomIndicator(Graphics g) {
int x1 = 10;
int y1 = 10;
double aspectRatio = (double) imageHeight / imageWidth;
int w1 = 64;
if (aspectRatio > 1.0) w1 = (int) (w1 / aspectRatio);
int h1 = (int) (w1 * aspectRatio);
if (w1 < 4) w1 = 4;
if (h1 < 4) h1 = 4;
int w2 = (int) (w1 * ((double) srcRect.width / imageWidth));
int h2 = (int) (h1 * ((double) srcRect.height / imageHeight));
if (w2 < 1) w2 = 1;
if (h2 < 1) h2 = 1;
int x2 = (int) (w1 * ((double) srcRect.x / imageWidth));
int y2 = (int) (h1 * ((double) srcRect.y / imageHeight));
if (zoomIndicatorColor == null) zoomIndicatorColor = new Color(128, 128, 255);
g.setColor(zoomIndicatorColor);
((Graphics2D) g).setStroke(Roi.onePixelWide);
g.drawRect(x1, y1, w1, h1);
if (w2 * h2 <= 200 || w2 < 10 || h2 < 10) g.fillRect(x1 + x2, y1 + y2, w2, h2);
else g.drawRect(x1 + x2, y1 + y2, w2, h2);
}
void initGraphics(Graphics g, Color textColor, Color defaultColor) {
if (smallFont == null) {
smallFont = new Font("SansSerif", Font.PLAIN, 9);
largeFont = new Font("SansSerif", Font.PLAIN, 12);
}
if (textColor != null) {
labelColor = textColor;
if (overlay != null && overlay.getDrawBackgrounds())
bgColor =
new Color(
255 - labelColor.getRed(), 255 - labelColor.getGreen(), 255 - labelColor.getBlue());
else bgColor = null;
} else {
int red = defaultColor.getRed();
int green = defaultColor.getGreen();
int blue = defaultColor.getBlue();
if ((red + green + blue) / 3 < 128) labelColor = Color.white;
else labelColor = Color.black;
bgColor = defaultColor;
}
this.defaultColor = defaultColor;
g.setColor(defaultColor);
}
public void paint(Graphics g) {
Roi roi = imp.getRoi();
if (roi != null || showAllROIs || overlay != null) {
if (roi != null) roi.updatePaste();
if (!IJ.isMacOSX() && imageWidth != 0) {
paintDoubleBuffered(g);
return;
}
}
try {
if (imageUpdated) {
imageUpdated = false;
imp.updateImage();
}
Java2.setBilinearInterpolation(g, Prefs.interpolateScaledImages);
Image img = imp.getImage();
if (img != null)
g.drawImage(
img,
0,
0,
(int) (srcRect.width * magnification),
(int) (srcRect.height * magnification),
srcRect.x,
srcRect.y,
srcRect.x + srcRect.width,
srcRect.y + srcRect.height,
null);
if (overlay != null) drawOverlay(g);
if (showAllROIs) drawAllROIs(g);
if (roi != null) drawRoi(roi, g);
if (srcRect.width < imageWidth || srcRect.height < imageHeight) drawZoomIndicator(g);
if (IJ.debugMode) showFrameRate(g);
} catch (OutOfMemoryError e) {
IJ.outOfMemory("Paint");
}
}