/* * Smart GWT (GWT for SmartClient) * Copyright 2008 and beyond, Isomorphic Software, Inc. * * Smart GWT is free software; you can redistribute it and/or modify it * under the terms of the GNU Lesser General Public License version 3 * as published by the Free Software Foundation. Smart GWT is also * available under typical commercial license terms - see * http://smartclient.com/license * * This software is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. */ 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.google.gwt.core.client.EntryPoint; public class LinesAndArrowheadsSample implements EntryPoint { private DrawPane drawPane; private DynamicForm lineStyleDynamicForm; public void onModuleLoad() { 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.setColWidths(150, "*"); 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(); layout.draw(); } /** * 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(); } }