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/***************************************************************************
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Title: GraphBrowser/GraphView.java
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ID: $Id$
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Author: Stefan Berghofer, TU Muenchen
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Copyright 1997 TU Muenchen
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This class defines the window in which the graph is displayed. It
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contains methods for handling events such as collapsing / uncollapsing
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nodes of the graph.
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***************************************************************************/
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package GraphBrowser;
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import java.awt.*;
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import java.io.*;
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import java.util.*;
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import awtUtilities.*;
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public class GraphView extends ScrollCanvas {
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Graph gra,gra2;
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GraphBrowser parent;
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Vertex v=null;
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Vector collapsed=new Vector(10,10);
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Vector collapsedDirs=new Vector(10,10);
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TreeBrowser tb;
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long timestamp;
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Vertex highlighted=null;
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public void setTreeBrowser(TreeBrowser br) {
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tb=br;
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}
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public GraphBrowser getBrowser() { return parent; }
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public Graph getGraph() { return gra; }
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public Graph getOriginalGraph() { return gra2; }
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public GraphView(Graph gr,GraphBrowser br) {
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gra2=gr;
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parent=br;
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gra=(Graph)(gra2.clone());
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}
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public void PS(String fname,boolean printable) throws IOException {
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gra.PS(fname,printable);
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}
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public void paintCanvas(Graphics g)
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{
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set_size(gra.max_x-gra.min_x,gra.max_y-gra.min_y);
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gra.draw(g);
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}
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public boolean mouseMove(Event evt,int x,int y) {
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x+=gra.min_x;
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y+=gra.min_y;
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Vertex v2=gra.vertexAt(x,y);
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Graphics g=getGraphics();
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g.translate(-gra.min_x,-gra.min_y);
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if (highlighted!=null) {
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highlighted.drawBox(g,Color.lightGray);
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highlighted=null;
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}
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if (v2!=v) {
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if (v!=null) v.removeButtons(g);
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if (v2!=null) v2.drawButtons(g);
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v=v2;
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}
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return true;
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}
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/*****************************************************************/
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/* This method is called if successor / predecessor nodes (whose */
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/* numbers are stored in Vector c) of a certain node should be */
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/* displayed again */
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/*****************************************************************/
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void uncollapse(Vector c) {
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collapsed.removeElement(c);
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collapseNodes();
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}
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/*****************************************************************/
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/* This method is called by class TreeBrowser when directories */
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/* are collapsed / uncollapsed by the user */
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/*****************************************************************/
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public void collapseDir(Vector v) {
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collapsedDirs=v;
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collapseNodes();
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}
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/*****************************************************************/
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/* Inflate node again */
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/*****************************************************************/
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public void inflateNode(Vector c) {
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Enumeration e1;
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e1=collapsedDirs.elements();
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while (e1.hasMoreElements()) {
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Directory d=(Directory)(e1.nextElement());
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if (d.collapsed==c) {
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tb.selectNode(d.getNode());
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return;
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}
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}
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collapsed.removeElement(c);
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e1=gra2.getVertices();
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while (e1.hasMoreElements()) {
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Vertex vx=(Vertex)(e1.nextElement());
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if (vx.getUp()==c) vx.setUp(null);
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if (vx.getDown()==c) vx.setDown(null);
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}
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collapseNodes();
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relayout();
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}
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public void relayout() {
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parent.showWaitMessage();
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highlighted=null;
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gra.layout(getGraphics());
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v=null;
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update(getGraphics());
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parent.showReadyMessage();
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}
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public void focusToVertex(int n) {
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Vertex vx=gra.getVertexByNum(n);
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if (vx!=null) {
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focus_to(vx.getX()-gra.min_x,vx.getY()-gra.min_y);
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highlighted=vx;
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Graphics g=getGraphics();
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g.translate(-gra.min_x,-gra.min_y);
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vx.drawBox(g,Color.white);
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}
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}
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/*****************************************************************/
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/* Create new graph with collapsed nodes */
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/*****************************************************************/
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public void collapseNodes() {
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Enumeration e1=collapsed.elements();
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gra=(Graph)(gra2.clone());
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while (e1.hasMoreElements()) {
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Vector v1=(Vector)(e1.nextElement());
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Vector v2=gra.decode(v1);
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if (!v2.isEmpty()) gra.collapse(v2,"[. . . .]",v1);
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}
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e1=collapsedDirs.elements();
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while (e1.hasMoreElements()) {
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Directory d=(Directory)(e1.nextElement());
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Vector v=gra.decode(d.getCollapsed());
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if (!v.isEmpty())
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gra.collapse(v,"["+d.getName()+"]",d.getCollapsed());
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}
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}
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public boolean mouseDown(Event evt,int x,int y) {
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Vector code=null;
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Vertex v2;
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x+=gra.min_x;
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y+=gra.min_y;
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if (v!=null) {
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int num=v.getNumber();
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v2=gra2.getVertexByNum(num);
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if (v.leftButton(x,y)) {
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if (v.getUp()!=null) {
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code=v.getUp();
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v2.setUp(null);
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v=null;
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uncollapse(code);
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relayout();
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focusToVertex(num);
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} else {
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Vector vs=v2.getPreds();
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code=gra2.encode(vs);
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v.setUp(code);v2.setUp(code);
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v=null;
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collapsed.insertElementAt(code,0);
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collapseNodes();
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relayout();
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focusToVertex(num);
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}
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} else if (v.rightButton(x,y)) {
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if (v.getDown()!=null) {
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code=v.getDown();
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v2.setDown(null);
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v=null;
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uncollapse(code);
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relayout();
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focusToVertex(num);
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} else {
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Vector vs=v2.getSuccs();
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code=gra2.encode(vs);
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v.setDown(code);v2.setDown(code);
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v=null;
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collapsed.insertElementAt(code,0);
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collapseNodes();
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relayout();
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focusToVertex(num);
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}
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} else if (v.getInflate()!=null) {
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inflateNode(v.getInflate());
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v=null;
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} else {
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if (evt.when-timestamp < 400 && !(v.getPath().equals("")))
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parent.viewFile(v.getPath());
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timestamp=evt.when;
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}
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}
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return true;
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}
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public boolean mouseExit(Event evt,int x,int y) {
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Graphics g=getGraphics();
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g.translate(-gra.min_x,-gra.min_y);
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if (highlighted!=null) {
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highlighted.drawBox(g,Color.lightGray);
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highlighted=null;
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}
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if (v!=null) v.removeButtons(g);
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v=null;
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return true;
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}
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}
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