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index.zulzul<zk>
<window
id="Win"
apply="org.zkoss.bind.BindComposer"
viewModel="@id('vm') @init('pkg$.TestVM')">
<separator />
<hlayout>
<label value="Risk Level:" />
<combobox
readonly="true"
width="150px">
<comboitem
id="comboLR"
height="24px"
label="No or low risk"
value="LR" />
<comboitem
id="comboMR"
height="24px"
label="With risk"
value="MR" />
<comboitem
id="comboHR"
height="24px"
label="High risk"
value="HR" />
</combobox>
</hlayout>
</window>
</zk>
TestVM.javajavaimport org.zkoss.bind.annotation.*;
import org.zkoss.image.AImage;
import org.zkoss.zk.ui.Component;
import org.zkoss.zk.ui.select.Selectors;
import org.zkoss.zk.ui.select.annotation.Wire;
import org.zkoss.zul.Comboitem;
import org.zkoss.zul.Window;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.awt.geom.Ellipse2D;
import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.RenderingHints;
import java.io.ByteArrayOutputStream;
import javax.imageio.ImageIO;
public class TestVM {
@Wire("#Win")
private Window win;
@AfterCompose
public void afterCompose(@ContextParam(ContextType.VIEW) Component view) throws Exception {
Selectors.wireComponents(view, this, false);
_initRiskDropList();
}
private AImage _drawCircle(String riskLevel) throws Exception {
BufferedImage bi = new BufferedImage(22, 22, BufferedImage.TRANSLUCENT);
Graphics2D g2d = bi.createGraphics();
g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
Ellipse2D circle = new Ellipse2D.Double(0, 0, 20, 20);
if ("HR".equals(riskLevel)) {
g2d.setColor(Color.RED);
} else if ("MR".equals(riskLevel)) {
g2d.setColor(new Color(255, 200, 0));
} else if ("LR".equals(riskLevel)) {
g2d.setColor(new Color(150, 255, 0));
} else {
g2d.setColor(Color.WHITE);
}
g2d.fill(circle);
g2d.setStroke(new BasicStroke(0.5f));
g2d.setColor(Color.BLACK);
g2d.draw(circle);
ByteArrayOutputStream baos = new ByteArrayOutputStream();
ImageIO.write(bi, "png", baos);
baos.flush();
byte[] imageInByte = baos.toByteArray();
baos.close();
AImage img = new AImage("", imageInByte);
return img;
}
private void _initRiskDropList() throws Exception {
String[] riskLevel = { "HR", "MR", "LR" };
Comboitem combo = null;
for (String code : riskLevel) {
combo = (Comboitem) win.getFellow("combo" + code);
combo.setImageContent(_drawCircle(code));
}
}
}