DragMoveImageSample.java

package com.smartgwt.sample.showcase.client.effects.dragdrop;

import com.smartgwt.client.types.Alignment;
import com.smartgwt.client.types.DragAppearance;
import com.smartgwt.client.widgets.Canvas;
import com.smartgwt.client.widgets.Img;
import com.smartgwt.client.widgets.layout.HStack;
import com.smartgwt.client.widgets.layout.VStack;
import com.smartgwt.sample.showcase.client.PanelFactory;
import com.smartgwt.sample.showcase.client.ShowcasePanel;


public class DragMoveImageSample extends ShowcasePanel {
    private static final String DESCRIPTION = "Drag and drop to move pieces between the boxes. The green box sets a thicker green \"drop line\" indicator to match its border. " +
                                              "The blue box shows a \"drag placeholder\" outline at the original location of the dragged object while dragging.";

    public static class Factory implements PanelFactory {
        private String id;

        public Canvas create() {
            DragMoveImageSample panel = new DragMoveImageSample();
            id = panel.getID();
            return panel;
        }

        public String getID() {
            return id;
        }

        public String getDescription() {
            return DESCRIPTION;
        }
    }

    public Canvas getViewPanel() {
        HStack hStack = new HStack(10);
        hStack.setLayoutMargin(10);
        hStack.setLeft(120);
        hStack.setShowEdges(true);
        hStack.setEdgeImage("edges/blue/6.png");
        hStack.setCanAcceptDrop(true);
        hStack.setAnimateMembers(true);
        hStack.setShowDragPlaceHolder(true);
        hStack.setBorder("1px solid #4040ff");
        hStack.addMember(new DragPiece("cube_blue.png"));
        hStack.addMember(new DragPiece("cube_green.png"));
        hStack.addMember(new DragPiece("cube_yellow.png"));
        

        VStack vStack = new VStack(10);
        vStack.setLayoutMargin(10);
        vStack.setShowEdges(true);
        vStack.setEdgeImage("edges/green/6.png");
        vStack.setCanAcceptDrop(true);
        vStack.setAnimateMembers(true);
        vStack.setDropLineThickness(4);
        Canvas dropLineProp = new Canvas();
        dropLineProp.setBackgroundColor("#40c040");
        vStack.setDropLineProperties(dropLineProp);
        vStack.addMember(new DragPiece("cube_blue.png"));
        vStack.addMember(new DragPiece("cube_green.png"));
        vStack.addMember(new DragPiece("cube_yellow.png"));
        
        Canvas main = new Canvas();
        main.addChild(hStack);
        main.addChild(vStack);
        
        
        return main;
    }

    public String getIntro() {
        return DESCRIPTION;
    }
    
    private class DragPiece extends Img {
    	public DragPiece() {
    		setWidth(48);
    		setHeight(48);
    		setLayoutAlign(Alignment.CENTER);
    		setCanDragReposition(true);
    		setCanDrop(true);
    		setDragAppearance(DragAppearance.TARGET);
    		setAppImgDir("pieces/48/");
    	}
    	
    	public DragPiece(String src) {
    		this();
    		setSrc(src);
    	}
    }

}