package com.smartgwt.sample.showcase.client.drawing;
import java.util.LinkedHashMap;
import com.smartgwt.client.types.Cursor;
import com.smartgwt.client.types.LineCap;
import com.smartgwt.client.types.LinePattern;
import com.smartgwt.client.types.Overflow;
import com.smartgwt.client.widgets.Canvas;
import com.smartgwt.client.widgets.drawing.DrawLine;
import com.smartgwt.client.widgets.drawing.DrawLinePath;
import com.smartgwt.client.widgets.drawing.DrawPane;
import com.smartgwt.client.widgets.drawing.Point;
import com.smartgwt.client.widgets.events.DrawEvent;
import com.smartgwt.client.widgets.events.DrawHandler;
import com.smartgwt.client.widgets.form.DynamicForm;
import com.smartgwt.client.widgets.form.events.ItemChangedEvent;
import com.smartgwt.client.widgets.form.events.ItemChangedHandler;
import com.smartgwt.client.widgets.form.fields.SelectItem;
import com.smartgwt.client.widgets.form.fields.SpinnerItem;
import com.smartgwt.client.widgets.layout.VLayout;
import com.smartgwt.sample.showcase.client.PanelFactory;
import com.smartgwt.sample.showcase.client.ShowcasePanel;
public class LinesAndArrowheadsSample extends ShowcasePanel {
private static final String DESCRIPTION = "Sample of using lines and curves with selects for line width, style, and arrowhead style, generated at random coordinates.";
public static class Factory implements PanelFactory {
private String id;
public ShowcasePanel create() {
LinesAndArrowheadsSample panel = new LinesAndArrowheadsSample();
id = panel.getID();
return panel;
}
public String getID() {
return id;
}
public String getDescription() {
return DESCRIPTION;
}
}
private DrawPane drawPane;
private DynamicForm lineStyleDynamicForm;
public Canvas getViewPanel() {
drawPane = new DrawPane();
drawPane.setHeight(200);
drawPane.setWidth(400);
drawPane.setTop(650);
drawPane.setLeft(25);
drawPane.setShowEdges(true);
drawPane.setEdgeSize(4);
drawPane.setBackgroundColor("papayawhip");
drawPane.setOverflow(Overflow.HIDDEN);
drawPane.setCursor(Cursor.AUTO);
drawPane.draw();
drawPane.addDrawHandler(new DrawHandler() {
@Override
public void onDraw(DrawEvent event) {
DrawPane drawPane = (DrawPane) event.getSource();
drawLines(drawPane);
}
});
SpinnerItem lineWidthSpinner = new SpinnerItem();
lineWidthSpinner.setName("lineWidth");
lineWidthSpinner.setTitle("Line Width");
lineWidthSpinner.setDefaultValue(5);
lineWidthSpinner.setMin(1);
lineWidthSpinner.setMax(10);
lineWidthSpinner.setStep(1);
lineWidthSpinner.setWidth(150);
LinkedHashMap<String, String> lineStyleValues = new LinkedHashMap<String, String>();
lineStyleValues.put(LinePattern.SOLID.getValue(),"Solid");
lineStyleValues.put(LinePattern.DOT.getValue(),"Dot");
lineStyleValues.put(LinePattern.DASH.getValue(),"Dash");
lineStyleValues.put(LinePattern.SHORTDOT.getValue(),"Short dot");
lineStyleValues.put(LinePattern.SHORTDASH.getValue(),"Short dash");
lineStyleValues.put(LinePattern.LONGDASH.getValue(),"Long dash");
SelectItem lineStyleSelect = new SelectItem();
lineStyleSelect.setName("lineStyle");
lineStyleSelect.setTitle("Line Style");
lineStyleSelect.setWidth(150);
lineStyleSelect.setDefaultValue("solid");
lineStyleSelect.setValueMap(lineStyleValues);
LinkedHashMap<String, String> arrowheadStyleValues = new LinkedHashMap<String, String>();
arrowheadStyleValues.put(LineCap.ROUND.getValue(),"Round");
arrowheadStyleValues.put(LineCap.SQUARE.getValue(),"Square");
arrowheadStyleValues.put(LineCap.BUTT.getValue(),"Butt");
SelectItem arrowStyleSelect = new SelectItem();
arrowStyleSelect.setName("arrowheadStyle");
arrowStyleSelect.setTitle("Line Cap Style");
arrowStyleSelect.setWidth(150);
arrowStyleSelect.setDefaultValue("round");
arrowStyleSelect.setValueMap(arrowheadStyleValues);
ItemChangedHandler lineStyleItemChangedHandler = new ItemChangedHandler() {
@Override
public void onItemChanged(ItemChangedEvent event) {
drawLines(drawPane);
}
};
lineStyleDynamicForm = new DynamicForm();
lineStyleDynamicForm.setID("dynamicForm");
lineStyleDynamicForm.setWidth(300);
lineStyleDynamicForm.setHeight(100);
lineStyleDynamicForm.setLeft(25);
lineStyleDynamicForm.setTop(850);
lineStyleDynamicForm.setFields(lineWidthSpinner,lineStyleSelect,arrowStyleSelect);
lineStyleDynamicForm.addItemChangedHandler(lineStyleItemChangedHandler);
lineStyleDynamicForm.draw();
drawLines(drawPane);
VLayout layout = new VLayout();
layout.addMember(drawPane);
layout.addMember(lineStyleDynamicForm);
layout.draw();
return layout;
}
/**
* This method is called to re-render the lines within the second draw pane to
* demonstrate the different line types and shapes.
*/
private void drawLines(DrawPane drawPane) {
drawPane.erase();
int lineWidth = (Integer) lineStyleDynamicForm.getValue("lineWidth");
String lineStyle = (String) lineStyleDynamicForm.getValue("lineStyle");
String arrowheadStyle = (String) lineStyleDynamicForm.getValue("arrowheadStyle");
LineCap lineCap = null;
if(LineCap.BUTT.getValue().equals(arrowheadStyle)){
lineCap = LineCap.BUTT;
} else if(LineCap.ROUND.getValue().equals(arrowheadStyle)){
lineCap = LineCap.ROUND;
} else if(LineCap.SQUARE.getValue().equals(arrowheadStyle)){
lineCap = LineCap.SQUARE;
}
LinePattern linePattern = null;
if(LinePattern.DASH.getValue().equals(lineStyle)){
linePattern = LinePattern.DASH;
} else if(LinePattern.DOT.getValue().equals(lineStyle)){
linePattern = LinePattern.DOT;
} else if(LinePattern.LONGDASH.getValue().equals(lineStyle)){
linePattern = LinePattern.LONGDASH;
} else if(LinePattern.SHORTDASH.getValue().equals(lineStyle)){
linePattern = LinePattern.SHORTDASH;
} else if(LinePattern.SHORTDOT.getValue().equals(lineStyle)){
linePattern = LinePattern.SHORTDOT;
} else if(LinePattern.SOLID.getValue().equals(lineStyle)){
linePattern = LinePattern.SOLID;
}
DrawLine drawLine = new DrawLine();
drawLine.setDrawPane(drawPane);
drawLine.setStartPoint(new Point(20,30));
drawLine.setEndPoint(new Point(180,160));
drawLine.setLineWidth(lineWidth);
drawLine.setLineCap(lineCap);
drawLine.setLinePattern(linePattern);
drawLine.draw();
DrawLinePath drawLinePath = new DrawLinePath();
drawLinePath.setDrawPane(drawPane);
drawLinePath.setStartTop(40);
drawLinePath.setStartLeft(170);
drawLinePath.setEndLeft(340);
drawLinePath.setEndTop(160);
drawLinePath.setLineWidth(lineWidth);
drawLinePath.setLineCap(lineCap);
drawLinePath.setLinePattern(linePattern);
drawLinePath.draw();
}
public String getIntro() {
return DESCRIPTION;
}
}