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/* $Id: GraphForm.cs,v 1.10 2009/06/03 01:10:59 ellson Exp $ $Revision: 1.10 $ */
/* vim:set shiftwidth=4 ts=8: */
/**********************************************************
* This software is part of the graphviz package *
* http://www.graphviz.org/ *
* *
* Copyright (c) 1994-2008 AT&T Corp. *
* and is licensed under the *
* Common Public License, Version 1.0 *
* by AT&T Corp. *
* *
* Information and Software Systems Research *
* AT&T Research, Florham Park NJ *
**********************************************************/
using System;
using System.ComponentModel;
using System.Drawing;
using System.Drawing.Imaging;
using System.Drawing.Printing;
using System.IO;
using System.Windows.Forms;
using System.Collections.Generic;
using System.Text;
namespace Graphviz
{
public partial class GraphForm : Form, FormController.IMenus
{
public event EventHandler Changed;
public Graph Graph
{
get { return _graph; }
}
public GraphForm(string fileName)
{
InitializeComponent();
/* window title is the filename portion */
Text = Path.GetFileName(fileName);
/* associated icon is eventually sourced by the desktop from this executable's embedded Win32 resources */
Icon = Icon.ExtractAssociatedIcon(fileName);
_graph = new Graph(fileName);
/* whenever graph changes, rerender and display the graph */
_graph.Changed += delegate(object sender, EventArgs e)
{
RenderGraph();
};
_graph.Arguments["layout"] = "dot";
_watcher = new PathWatcher(fileName);
_watcher.SynchronizingObject = this;
_watcher.Changed += delegate(object sender, CancelEventArgs eventArgs)
{
try
{
/* replace old graph with new and rerender */
Graph newGraph = new Graph(((PathWatcher)sender).Watched);
((IDisposable)_graph).Dispose();
_graph = newGraph;
_graph.Arguments["layout"] = "dot";
RenderGraph();
if (Changed != null)
Changed(this, EventArgs.Empty);
}
catch (Win32Exception exception)
{
/* if another process is holding on to the graph, try opening again later */
if (exception.NativeErrorCode == 32)
eventArgs.Cancel = false;
}
};
_watcher.Start();
/* set up export dialog with initial file and filters from the graph devices */
StringBuilder exportFilter = new StringBuilder();
int filterIndex = 0;
for (int deviceIndex = 0; deviceIndex < _devices.Count; ++deviceIndex)
{
if (deviceIndex > 0)
exportFilter.Append("|");
string device = _devices[deviceIndex];
exportFilter.Append(String.Format("{0} (*.{1})|*.{1}", device.ToUpper(), device));
if (filterIndex == 0 && device == "emfplus")
filterIndex = deviceIndex;
}
exportFileDialog.FileName = Path.GetFileNameWithoutExtension(fileName);
exportFileDialog.Filter = exportFilter.ToString();
exportFileDialog.FilterIndex = filterIndex + 1;
printDocument.DocumentName = Path.GetFileName(fileName);
}
protected override void OnFormClosed(FormClosedEventArgs e)
{
/* when form closes, clean up graph too */
((IDisposable)_graph).Dispose();
base.OnFormClosed(e);
}
private void RenderGraph()
{
using (Stream stream = _graph.Render("emfplus:gdiplus"))
graphControl.Image = new Metafile(stream);
}
ToolStripMenuItem FormController.IMenus.ExitMenuItem
{
get { return exitToolStripMenuItem; }
}
ToolStripMenuItem FormController.IMenus.OpenMenuItem
{
get { return openToolStripMenuItem; }
}
ToolStripMenuItem FormController.IMenus.WindowMenuItem
{
get { return windowToolStripMenuItem; }
}
private void ShowAttributes_Click(object sender, EventArgs eventArgs)
{
AttributeInspectorForm.Instance.Show();
}
private void ZoomToFit_Click(object sender, EventArgs eventArgs)
{
graphControl.ZoomToFit();
}
private void ActualSize_Click(object sender, EventArgs eventArgs)
{
graphControl.ActualSize();
}
private void ZoomIn_Click(object sender, EventArgs eventArgs)
{
graphControl.ZoomIn();
}
private void ZoomOut_Click(object sender, EventArgs eventArgs)
{
graphControl.ZoomOut();
}
private void exportToolStripMenuItem_Click(object sender, EventArgs e)
{
/* pose the export dialog and then render the graph with the selected file and format */
if (exportFileDialog.ShowDialog(this) == DialogResult.OK)
{
int filterIndex = exportFileDialog.FilterIndex - 1;
if (filterIndex >= 0 && filterIndex < _devices.Count)
_graph.Render(_devices[filterIndex], exportFileDialog.FileName);
}
}
private void pageSetupToolStripMenuItem_Click(object sender, EventArgs e)
{
pageSetupDialog.ShowDialog(this);
}
private void printToolStripMenuItem_Click(object sender, EventArgs e)
{
if (printDialog.ShowDialog(this) == DialogResult.OK)
printDocument.Print();
}
private void printPreviewToolStripMenuItem_Click(object sender, EventArgs e)
{
printPreviewDialog.ShowDialog(this);
}
private void printDocument_BeginPrint(object sender, PrintEventArgs e)
{
new TileableImagePrinter((PrintDocument)sender, graphControl.Image);
}
private static readonly IList<string> _devices = Graph.GetPlugins(Graph.API.Device, false);
private Graph _graph;
private readonly PathWatcher _watcher;
}
}
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