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Diffstat (limited to 'qtsharp/src/examples/samples/scribblewindow.cs')
| -rw-r--r-- | qtsharp/src/examples/samples/scribblewindow.cs | 212 |
1 files changed, 212 insertions, 0 deletions
diff --git a/qtsharp/src/examples/samples/scribblewindow.cs b/qtsharp/src/examples/samples/scribblewindow.cs new file mode 100644 index 00000000..6b594eb8 --- /dev/null +++ b/qtsharp/src/examples/samples/scribblewindow.cs @@ -0,0 +1,212 @@ +// scribblewindow.cs - Qt# scribblewindow +// +// Author: Adam Treat <manyoso@yahoo.com> +// (c) 2002 Adam Treat +// Licensed under the terms of the GNU GPL + +namespace QtSamples { + + using Qt; + using System; + + [DeclareQtSignal ("colorChanged(QColor)")] + [DeclareQtSignal ("load(QString)")] + [DeclareQtSignal ("save(QString)")] + public class ScribbleWindow : QMainWindow { + + private QMenuBar menubar; + private QPopupMenu filemenu; + private QPopupMenu aboutmenu; + private QScrollView scrollview; + public ScribbleArea scribblearea; + + enum Color {Black, Red, Blue, Green, Yellow}; + + public static int Main (String[] args) + { + QApplication app = new QApplication (args); + ScribbleWindow demo = new ScribbleWindow (); + demo.SetGeometry (50, 500, 400, 400); + app.SetMainWidget (demo); + demo.SetCaption ("Qt# 0.7!"); + demo.Show (); + return app.Exec (); + } + + ScribbleWindow () : base (null, null) + { + filemenu = new QPopupMenu (null, "filemenu"); + filemenu.InsertItem ("&Load", this, SLOT ("SlotLoad()") ); + filemenu.InsertItem ("&Save", this, SLOT ("SlotSave()") ); + filemenu.InsertSeparator (); + filemenu.InsertItem ("&Quit", qApp, SLOT ("quit()")); + + aboutmenu = new QPopupMenu (null, "helpmenu"); + aboutmenu.InsertItem ("&About Qt-Sharp", this, SLOT ("SlotAboutQtSharp()")); + aboutmenu.InsertItem ("&About Qt", this, SLOT ("SlotAboutQt()")); + + menubar = new QMenuBar (this, ""); + menubar.InsertItem ("&File", filemenu); + menubar.InsertItem ("&Color", this, SLOT("SlotColorChooser()")); + menubar.InsertItem ("&About", aboutmenu); + + scrollview = new QScrollView (this); + scrollview.SetGeometry (0, menubar.Height (), Width (), Height () - menubar.Height ()); + scribblearea = new ScribbleArea (this); + scribblearea.SetGeometry (0, 0, 1000, 1000); + scrollview.AddChild (scribblearea); + this.SetCentralWidget (scrollview); + SetMaximumSize (Width (), Height () - menubar.Height ()); + + QObject.Connect (this, SIGNAL ("colorChanged(QColor)"), + scribblearea, SLOT ("SlotSetColor(QColor)") ); + QObject.Connect (this, SIGNAL ("load(QString)"), + scribblearea, SLOT ("PerformLoad(QString)") ); + QObject.Connect (this, SIGNAL ("save(QString)"), + scribblearea, SLOT ("PerformSave(QString)") ); + } + + public void SlotLoad () + { + string filename = QFileDialog.GetOpenFileName (".", "*.bmp", this, + null, "Load File", QString.Null, true); + + if ( filename != null ) + Emit ("load(QString)", (QString) filename); + } + + public void SlotSave () + { + string filename = QFileDialog.GetSaveFileName (".", "*.bmp", this, + null, "Save File", QString.Null, true); + + if ( filename != null ) + { + if ( ! filename.ToLower().EndsWith(".bmp") ) + filename += ".bmp"; + Emit ("save(QString)", (QString) filename); + } + } + + public void SlotAboutQtSharp () + { + QMessageBox.Information (this, "About Qt# 0.7", + "A Qt (http://www.trolltech.com) to C# language binding. \n" + + "Qt# is compatible with Mono (http://go-mono.org) and\n" + + "Portable.NET (http://www.southern-storm.com.au/portable_net.html)\n" + + "(c) 2002 Adam Treat. Licensed under the terms of the GNU GPL.\n" + ); + } + + public void SlotAboutQt () + { + QMessageBox.AboutQt (this, "About Qt"); + } + + public void SlotColorChooser () + { + QColor chosenColor = QColorDialog.GetColor(); + if (chosenColor.IsValid()) + Emit ("colorChanged(QColor)", chosenColor); + } + + public class ScribbleArea : QFrame { + private QPoint last; + private QPixmap buffer; + private QColor currentcolor = new QColor("Black"); + private QPopupMenu popupmenu; + + public ScribbleArea (QWidget parent) : base (parent) + { + buffer = new QPixmap (); + last = new QPoint (); + SetBackgroundMode (Qt.BackgroundMode.NoBackground); + + popupmenu = new QPopupMenu(); + popupmenu.InsertItem ("&Clear", this, SLOT ("SlotClearArea()") ); + + mouseMoveEvent += new MouseMoveEvent (MouseMoved); + mousePressEvent += new MousePressEvent (MousePressed); + paintEvent += new PaintEvent (PerformPaint); + resizeEvent += new ResizeEvent (PerformResize); + } + + public void PerformLoad (QString filename) + { + if ( ! buffer.Load(filename) ) + QMessageBox.Warning (null, "Load error", "Could not load file"); + Repaint(); + } + + public void PerformSave (QString filename) + { + if ( ! buffer.Save (filename, "BMP") ) + QMessageBox.Warning( null, "Save error", "Could not save file"); + } + + public void SlotClearArea () + { + buffer.Fill( new QColor ("white") ); + BitBlt (this, 0, 0, buffer, 0, 0, -1, -1, Qt.RasterOp.CopyROP, false); + } + + + public void SlotSetColor (QColor color) + { + currentcolor = color; + } + + // Note, Dispose() is called on QPoints here to increase performance + // of the UI. Otherwise, the GC would let dead QPoint instances pile + // up and delete them all at once, causing the UI to pause while it frees + // memory. (This happens because the GC runs in the same thread as the + // application.) + + protected void MousePressed (QMouseEvent e) + { + if (e.Button() == ButtonState.RightButton ) + popupmenu.Exec (QCursor.Pos ()); + else { + last.Dispose (); + last = e.Pos(); + } + } + + protected void MouseMoved (QMouseEvent e) + { + QPainter windowPainter = new QPainter (); + QPainter bufferPainter = new QPainter (); + + windowPainter.Begin (this); + bufferPainter.Begin (buffer); + + windowPainter.SetPen (currentcolor); + bufferPainter.SetPen (currentcolor); + + windowPainter.DrawLine (last, e.Pos()); + bufferPainter.DrawLine (last, e.Pos()); + + windowPainter.End (); + bufferPainter.End (); + + last.Dispose (); + last = e.Pos (); + } + + protected void PerformPaint (QPaintEvent e) + { + BitBlt(this, 0, 0, buffer, + 0, 0, -1, -1, RasterOp.CopyROP, false); + } + + protected void PerformResize (QResizeEvent e) + { + QPixmap save = new QPixmap (buffer); + buffer.Resize (e.Size()); + buffer.Fill (new QColor("white")); + BitBlt (buffer, 0, 0, save, + 0, 0, -1, -1, RasterOp.CopyROP, false); + } + } + } +} |