Java tutorial
/*---------------- FILE HEADER KALYPSO ------------------------------------------ * * This file is part of kalypso. * Copyright (C) 2004 by: * * Technical University Hamburg-Harburg (TUHH) * Institute of River and coastal engineering * Denickestrae 22 * 21073 Hamburg, Germany * http://www.tuhh.de/wb * * and * * Bjoernsen Consulting Engineers (BCE) * Maria Trost 3 * 56070 Koblenz, Germany * http://www.bjoernsen.de * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * This library 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. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * * Contact: * * E-Mail: * belger@bjoernsen.de * schlienger@bjoernsen.de * v.doemming@tuhh.de * * ---------------------------------------------------------------------------*/ package de.openali.odysseus.chart.framework.model.layer.impl; import java.util.HashMap; import java.util.Map; import org.eclipse.jface.resource.JFaceResources; import org.eclipse.swt.SWT; import org.eclipse.swt.graphics.Font; import org.eclipse.swt.graphics.GC; import org.eclipse.swt.graphics.Point; import org.eclipse.swt.graphics.Rectangle; import org.eclipse.swt.widgets.Display; import org.kalypso.contribs.eclipse.swt.graphics.RectangleUtils; import de.openali.odysseus.chart.framework.model.layer.EditInfo; import de.openali.odysseus.chart.framework.model.layer.IChartLayer; import de.openali.odysseus.chart.framework.util.ChartUtilities; /** * @author kimwerner */ public class GenericLayerRenderer { private static final int TOOLINSET = 3; private EditInfo m_editInfo; private final Map<IChartLayer, Point> m_layerPanOffsets = new HashMap<>(); private Rectangle m_dragArea = null; /** * the plot will be rendered to its AxesScreenHeight, so set the Axis.screenHeight first */ /** * @param bufferLayers * if set to true, each layer is buffered on an individual image; set this to true if you plan to offer * panning of single layers in the chart front end */ public EditInfo getTooltipInfo() { return m_editInfo; } public void paintDragArea(final GC gcw) { // Wenn ein DragRectangle da ist, dann muss nur das gezeichnet werden if (m_dragArea != null) { gcw.setLineWidth(1); gcw.setForeground(gcw.getDevice().getSystemColor(SWT.COLOR_BLACK)); gcw.setBackground(gcw.getDevice().getSystemColor(SWT.COLOR_BLUE)); final Rectangle r = RectangleUtils.createNormalizedRectangle(m_dragArea);// new Rectangle( x, y, w, h ) ); // TODO: SWT-Bug mit drawFocus (wird nicht immer gezeichnet), // irgendwann mal wieder berprfen gcw.setAlpha(50); gcw.fillRectangle(r.x, r.y, r.width, r.height); gcw.setAlpha(255); gcw.setLineStyle(SWT.LINE_DASH); gcw.drawRectangle(r.x, r.y, r.width, r.height); } } public void paintEditInfo(final GC gcw) { ChartUtilities.resetGC(gcw); if (m_editInfo == null) return; // draw hover shape if (m_editInfo.getHoverFigure() != null) m_editInfo.getHoverFigure().paint(gcw); // draw edit shape if (m_editInfo.getEditFigure() != null) m_editInfo.getEditFigure().paint(gcw); // draw tooltip ChartUtilities.resetGC(gcw); final Rectangle screen = gcw.getClipping(); String tooltiptext = m_editInfo.getText(); final Point mousePos = m_editInfo.getPosition(); if (tooltiptext != null && mousePos != null) { tooltiptext = tooltiptext.replace('\r', ' '); final Display display = ChartUtilities.getDisplay(); final Font oldFont = gcw.getFont(); final Font bannerFont = JFaceResources.getTextFont(); gcw.setFont(bannerFont); gcw.setBackground(display.getSystemColor(SWT.COLOR_INFO_BACKGROUND)); gcw.setForeground(display.getSystemColor(SWT.COLOR_INFO_FOREGROUND)); final Point toolsize = gcw.textExtent(tooltiptext); /* * Positionieren der Tooltip-Box: der ideale Platz liegt rechts unter dem Mauszeiger. Wenn rechts nicht gengend * Platz ist, dann wird er nach links verschoben. Der Startpunkt soll dabei immer im sichtbaren Bereich liegen. */ int toolx = mousePos.x + 3 + TOOLINSET; if (toolx + toolsize.x > screen.width) { toolx = screen.width - 5 - toolsize.x; if (toolx < 5) toolx = 5; } int tooly = mousePos.y + 3 + TOOLINSET + 20; if (tooly + toolsize.y > screen.height && mousePos.y - 3 - TOOLINSET - toolsize.y - 20 > 0) tooly = mousePos.y - 3 - TOOLINSET - toolsize.y - 20; gcw.setLineWidth(1); final Rectangle toolrect = new Rectangle(toolx - TOOLINSET, tooly - TOOLINSET, toolsize.x + TOOLINSET * 2, toolsize.y + TOOLINSET * 2); gcw.fillRectangle(toolrect); gcw.drawRectangle(toolrect); gcw.drawText(tooltiptext, toolx, tooly, true); gcw.setFont(oldFont); } } public void setDragArea(final Rectangle dragArea) { m_dragArea = dragArea; } /** * sets an offset to which the paint buffer is moved in case of a pan action; * * @param layers * if null, all layers are moved; else, only mentioned layers are moved * @param offset * positive value moves buffer to right / down, negative value to left / up */ public void setPanOffset(final IChartLayer[] layers, final Point offset) { for (final IChartLayer iChartLayer : layers) m_layerPanOffsets.put(iChartLayer, offset); } public void setTooltipInfo(final EditInfo hoverInfo) { m_editInfo = hoverInfo; } }