From 399abb1d550786b9077895ea1587d3f556fb0ed0 Mon Sep 17 00:00:00 2001
From: Tuukka Lehtonen <tuukka.lehtonen@semantum.fi>
Date: Fri, 7 Dec 2018 14:52:57 +0200
Subject: [PATCH] Implement ImageDescriptor.getImageData(int zoom)

gitlab #228

Change-Id: I0b0294a8a48d6d633c452fee780be502f4d58406
---
 .../utils/ui/gfx/ColorImageDescriptor.java    | 52 +++++++++-----
 .../utils/ui/gfx/TextImageDescriptor.java     | 72 +++++++++++--------
 2 files changed, 77 insertions(+), 47 deletions(-)

diff --git a/bundles/org.simantics.utils.ui/src/org/simantics/utils/ui/gfx/ColorImageDescriptor.java b/bundles/org.simantics.utils.ui/src/org/simantics/utils/ui/gfx/ColorImageDescriptor.java
index eca35f1fc..6c0f26d4e 100644
--- a/bundles/org.simantics.utils.ui/src/org/simantics/utils/ui/gfx/ColorImageDescriptor.java
+++ b/bundles/org.simantics.utils.ui/src/org/simantics/utils/ui/gfx/ColorImageDescriptor.java
@@ -36,28 +36,44 @@ public class ColorImageDescriptor extends ImageDescriptor {
 		this.selected = selected;
 	}
 
+	@Override
+	public ImageData getImageData(int zoom) {
+		int w = width;
+		int h = height;
+		if (zoom > 100) {
+			float s = zoom / 100.0f;
+			w = Math.round(width * s);
+			h = Math.round(height * s);
+		}
+		return getImageData(w, h);
+	}
+
 	@Override
 	public ImageData getImageData() {
-        ImageData id = new ImageData(width, height, 24, PALETTEDATA);
-        int cx = width / 2;
-        int cy = height / 2;
-        int dst = height * width / 23;
-        for (int x=0; x<width; x++) {
-            for (int y=0; y<height; y++) {
-                int color = c;
-                boolean border = x==0||x==width-1||y==0||y==height-1;
-                if ( border ) color = 0;
-                if (selected) {
-                	int dist = (x-cx)*(x-cx)+(y-cy)*(y-cy);
-                	if ( dist < dst ) color = 0xcccccc; 
-                }
-                id.setPixel(x, y, color);
-            }
-        }
-        
+		return getImageData(100);
+	}
+
+	private ImageData getImageData(int width, int height) {
+		ImageData id = new ImageData(width, height, 24, PALETTEDATA);
+		int cx = width / 2;
+		int cy = height / 2;
+		int dst = height * width / 23;
+		for (int x=0; x<width; x++) {
+			for (int y=0; y<height; y++) {
+				int color = c;
+				boolean border = x==0||x==width-1||y==0||y==height-1;
+				if ( border ) color = 0;
+				if (selected) {
+					int dist = (x-cx)*(x-cx)+(y-cy)*(y-cy);
+					if ( dist < dst ) color = 0xcccccc; 
+				}
+				id.setPixel(x, y, color);
+			}
+		}
+
 		return id;
 	}
-	
+
 	@Override
 	public int hashCode() {
 		return c + 7*width + 13*height + (selected?234234:4235);
diff --git a/bundles/org.simantics.utils.ui/src/org/simantics/utils/ui/gfx/TextImageDescriptor.java b/bundles/org.simantics.utils.ui/src/org/simantics/utils/ui/gfx/TextImageDescriptor.java
index 71aff7113..6676ae2bc 100644
--- a/bundles/org.simantics.utils.ui/src/org/simantics/utils/ui/gfx/TextImageDescriptor.java
+++ b/bundles/org.simantics.utils.ui/src/org/simantics/utils/ui/gfx/TextImageDescriptor.java
@@ -28,16 +28,16 @@ import org.simantics.utils.ObjectUtils;
 public class TextImageDescriptor extends ImageDescriptor {
 
 	static final PaletteData _RGB = new PaletteData(0x00ff0000, 0x0000ff00, 0x000000ff);
-	
+
 	public String text;
 	public int width, height;
 	public String font;
 	public int fontSize;
 	public int style;
 	public int rgb;
-	
+
 	private transient int hash;
-	
+
 	public TextImageDescriptor(String text, int width, int height, 
 			String font, int fontSize, 
 			int style, int rgb) {
@@ -53,38 +53,52 @@ public class TextImageDescriptor extends ImageDescriptor {
 	}
 
 	@Override
-	public ImageData getImageData() {
-        ImageData id = new ImageData(width, height, 24, _RGB);		
-        BufferedImage bi = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
-        Graphics2D g = (Graphics2D) bi.getGraphics();
-        g.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_ON);
-        Font f = new Font(font, style, fontSize);
-        g.setFont( f );
-        Color c = new Color(rgb);
-        g.setColor( c );
-        FontMetrics fm = g.getFontMetrics(f);
-        Rectangle2D rect = fm.getStringBounds(text, g);
-        g.drawString(text, (float) ((width-rect.getWidth())/2), (float) ( (height/2) + (height-rect.getHeight())/2) );
-        g.dispose();        
-        
-        Raster alpha = bi.getAlphaRaster();        
-        for (int x=0; x<width; x++) {
-        	for (int y=0; y<height; y++) {
-        		int a = alpha.getSample(x, y, 0);
-        		int rgb = bi.getRGB(x, y);
-        		id.setAlpha(x, y, a);
-        		id.setPixel(x, y, rgb);
-        	}
-        }
-        
+	public ImageData getImageData(int zoom) {
+		int w = width;
+		int h = height;
+		int fs = fontSize;
+		if (zoom > 100) {
+			float s = zoom / 100.0f;
+			w = Math.round(width * s);
+			h = Math.round(height * s);
+			fs = Math.round(fontSize * s);
+		}
+		return getImageData(w, h, fs);
+	}
+
+	private ImageData getImageData(int width, int height, int fontSize) {
+		ImageData id = new ImageData(width, height, 24, _RGB);
+
+		BufferedImage bi = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
+		Graphics2D g = (Graphics2D) bi.getGraphics();
+		g.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_ON);
+		Font f = new Font(font, style, fontSize);
+		g.setFont( f );
+		Color c = new Color(rgb);
+		g.setColor( c );
+		FontMetrics fm = g.getFontMetrics(f);
+		Rectangle2D rect = fm.getStringBounds(text, g);
+		g.drawString(text, (float) ((width-rect.getWidth())/2), (float) ( (height/2) + (height-rect.getHeight())/2) );
+		g.dispose();
+
+		Raster alpha = bi.getAlphaRaster();
+		for (int x=0; x<width; x++) {
+			for (int y=0; y<height; y++) {
+				int a = alpha.getSample(x, y, 0);
+				int rgb = bi.getRGB(x, y);
+				id.setAlpha(x, y, a);
+				id.setPixel(x, y, rgb);
+			}
+		}
+
 		return id;
 	}
-	
+
 	@Override
 	public int hashCode() {
 		return hash;
 	}
-	
+
 	@Override
 	public boolean equals(Object obj) {
 		if (obj instanceof TextImageDescriptor==false) return false;
-- 
2.43.2