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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
class ScribbleArea < Qt::Widget
slots 'clearImage()'
def initialize(parent = nil)
super(parent)
setAttribute(Qt::WA_StaticContents)
@modified = false
@scribbling = false
@myPenWidth = 1
@myPenColor = Qt::blue
@image = Qt::Image.new
@lastPoint = Qt::Point.new
end
def openImage(fileName)
loadedImage = Qt::Image.new
if !loadedImage.load(fileName)
return false
end
newSize = loadedImage.size().expandedTo(size())
resizeImage(loadedImage, newSize)
@image = loadedImage
@modified = false
update()
return true
end
def saveImage(fileName, fileFormat)
visibleImage = @image
resizeImage(visibleImage, size())
if visibleImage.save(fileName, fileFormat.to_s)
@modified = false
return true
else
return false
end
end
def modified?
return @modified
end
def penColor
return @myPenColor
end
def penColor=(newColor)
@myPenColor = newColor
end
def penWidth
return @myPenWidth
end
def penWidth=(newWidth)
@myPenWidth = newWidth
end
def clearImage()
@image.fill(qRgb(255, 255, 255))
@modified = true
update()
end
def mousePressEvent(event)
if event.button() == Qt::LeftButton
@lastPoint = event.pos()
@scribbling = true
end
end
def mouseMoveEvent(event)
if (Qt::LeftButton & event.buttons() != 0) && @scribbling
drawLineTo(event.pos())
end
end
def mouseReleaseEvent(event)
if event.button() == Qt::LeftButton && @scribbling
drawLineTo(event.pos())
@scribbling = false
end
end
def paintEvent(event)
painter = Qt::Painter.new(self)
painter.drawImage(Qt::Point.new(0, 0), @image)
painter.end
end
def resizeEvent(event)
if width() > @image.width() || height() > @image.height()
newWidth = [width() + 128, @image.width()].max
newHeight = [height() + 128, @image.height()].max
resizeImage(@image, Qt::Size.new(newWidth, newHeight))
update()
end
super(event)
end
def drawLineTo(endPoint)
painter = Qt::Painter.new(@image)
painter.pen = Qt::Pen.new(Qt::Brush.new(@myPenColor), @myPenWidth, Qt::SolidLine, Qt::RoundCap,
Qt::RoundJoin)
painter.drawLine(@lastPoint, endPoint)
@modified = true
rad = @myPenWidth / 2
update(Qt::Rect.new(@lastPoint, endPoint).normalized().adjusted(-rad, -rad, +rad, +rad))
@lastPoint = endPoint
painter.end
end
def resizeImage(image, newSize)
if image.size == newSize
return
end
newImage = Qt::Image.new(newSize, Qt::Image::Format_RGB32)
newImage.fill(qRgb(255, 255, 255))
painter = Qt::Painter.new(newImage)
painter.drawImage(Qt::Point.new(0, 0), image)
@image = newImage
painter.end
end
end
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