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=begin
**
** Copyright (C) 2004-2005 Trolltech AS. All rights reserved.
**
** This file is part of the example classes of the Qt Toolkit.
**
** This file may be used under the terms of the GNU General Public
** License version 2.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of
** this file. Please review the following information to ensure GNU
** General Public Licensing requirements will be met:
** http://www.trolltech.com/products/qt/opensource.html
**
** If you are unsure which license is appropriate for your use, please
** review the following information:
** http://www.trolltech.com/products/qt/licensing.html or contact the
** sales department at sales@trolltech.com.
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
** Translated to QtRuby by Richard Dale
=end
require 'scribblearea.rb'
class MainWindow < Qt::MainWindow
slots 'open()',
'save()',
'penColor()',
'penWidth()',
'about()'
def initialize(parent = nil)
super(parent)
@scribbleArea = ScribbleArea.new
@saveAsActs = []
setCentralWidget(@scribbleArea)
createActions()
createMenus()
setWindowTitle(tr("Scribble"))
resize(500, 500)
end
def closeEvent(event)
if maybeSave()
event.accept()
else
event.ignore()
end
end
def open()
if maybeSave()
fileName = Qt::FileDialog::getOpenFileName(self,
tr("Open File"), Qt::Dir::currentPath())
if !fileName.nil?
@scribbleArea.openImage(fileName)
end
end
end
def save()
action = sender()
fileFormat = action.data().toByteArray()
saveFile(fileFormat)
end
def penColor()
newColor = Qt::ColorDialog.getColor(Qt::Color.new(@scribbleArea.penColor))
if newColor.isValid()
@scribbleArea.penColor = newColor
end
end
def penWidth()
ok = Qt::Boolean.new
newWidth = Qt::InputDialog::getInteger(self, tr("Scribble"),
tr("Select pen width:"),
@scribbleArea.penWidth(),
1, 50, 1, ok)
if ok
@scribbleArea.penWidth = newWidth
end
end
def about()
Qt::MessageBox.about(self, tr("About Scribble"),
tr("<p>The <b>Scribble</b> example shows how to use Qt::MainWindow as the " +
"base widget for an application, and how to reimplement some of " +
"Qt::Widget's event handlers to receive the events generated for " +
"the application's widgets:</p><p> We reimplement the mouse event " +
"handlers to facilitate drawing, the paint event handler to " +
"update the application and the resize event handler to optimize " +
"the application's appearance. In addition we reimplement the " +
"close event handler to intercept the close events before " +
"terminating the application.</p><p> The example also demonstrates " +
"how to use Qt::Painter to draw an image in real time, as well as " +
"to repaint widgets.</p>"))
end
def createActions()
@openAct = Qt::Action.new(tr("&Open..."), self)
@openAct.shortcut = Qt::KeySequence.new(tr("Ctrl+O"))
connect(@openAct, SIGNAL('triggered()'), self, SLOT('open()'))
Qt::ImageWriter.supportedImageFormats().each do |format|
text = tr("%s..." % format.upcase)
action = Qt::Action.new(text, self)
action.data = Qt::Variant.new(format)
connect(action, SIGNAL('triggered()'), self, SLOT('save()'))
@saveAsActs.push action
end
@exitAct = Qt::Action.new(tr("E&xit"), self)
@exitAct.shortcut = Qt::KeySequence.new(tr("Ctrl+Q"))
connect(@exitAct, SIGNAL('triggered()'), self, SLOT('close()'))
@penColorAct = Qt::Action.new(tr("&Pen Color..."), self)
connect(@penColorAct, SIGNAL('triggered()'), self, SLOT('penColor()'))
@penWidthAct = Qt::Action.new(tr("Pen &Width..."), self)
connect(@penWidthAct, SIGNAL('triggered()'), self, SLOT('penWidth()'))
@clearScreenAct = Qt::Action.new(tr("&Clear Screen"), self)
@clearScreenAct.shortcut = Qt::KeySequence.new(tr("Ctrl+L"))
connect(@clearScreenAct, SIGNAL('triggered()'),
@scribbleArea, SLOT('clearImage()'))
@aboutAct = Qt::Action.new(tr("&About"), self)
connect(@aboutAct, SIGNAL('triggered()'), self, SLOT('about()'))
@aboutQtAct = Qt::Action.new(tr("About &Qt"), self)
connect(@aboutQtAct, SIGNAL('triggered()'), $qApp, SLOT('aboutQt()'))
end
def createMenus()
@saveAsMenu = Qt::Menu.new(tr("&Save As"), self)
@saveAsActs.each do |action|
@saveAsMenu.addAction(action)
end
@fileMenu = Qt::Menu.new(tr("&File"), self) do |f|
f.addAction(@openAct)
f.addMenu(@saveAsMenu)
f.addSeparator()
f.addAction(@exitAct)
end
@optionMenu = Qt::Menu.new(tr("&Options"), self) do |o|
o.addAction(@penColorAct)
o.addAction(@penWidthAct)
o.addSeparator()
o.addAction(@clearScreenAct)
end
@helpMenu = Qt::Menu.new(tr("&Help"), self) do |h|
h.addAction(@aboutAct)
h.addAction(@aboutQtAct)
end
menuBar().addMenu(@fileMenu)
menuBar().addMenu(@optionMenu)
menuBar().addMenu(@helpMenu)
end
def maybeSave()
if @scribbleArea.modified?
ret = Qt::MessageBox::warning(self, tr("Scribble"),
tr("The image has been modified.\n" +
"Do you want to save your changes?"),
Qt::MessageBox::Yes | Qt::MessageBox::Default,
Qt::MessageBox::No,
Qt::MessageBox::Cancel | Qt::MessageBox::Escape)
if ret == Qt::MessageBox::Yes
return saveFile("png")
elsif ret == Qt::MessageBox::Cancel
return false
end
end
return true
end
def saveFile(fileFormat)
initialPath = Qt::Dir.currentPath() + "/untitled." + fileFormat
fileName = Qt::FileDialog.getSaveFileName(self, tr("Save As"),
initialPath,
tr("%s Files (*.%s);;All Files (*)" %
[fileFormat.upcase, fileFormat] ) )
if fileName.nil?
return false
else
return @scribbleArea.saveImage(fileName, fileFormat)
end
end
end
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