Class: ColorItem

Inherits:
Qt::GraphicsItem show all
Defined in:
ext/ruby/qtruby/examples/graphicsview/dragdroprobot/coloritem.rb

Overview

** ** Copyright © 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: ** www.trolltech.com/products/qt/opensource.html ** ** If you are unsure which license is appropriate for your use, please ** review the following information: ** www.trolltech.com/products/qt/licensing.html or contact the ** sales department at [email protected]. ** ** 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

Constant Summary collapse

@@n = 
0

Instance Method Summary collapse

Methods inherited from Qt::GraphicsItem

#type

Methods inherited from Qt::Base

#%, #&, #*, #**, #+, #-, #-@, #/, #<, #<<, #<=, #==, #>, #>=, #>>, #QCOMPARE, #QEXPECT_FAIL, #QFAIL, #QSKIP, #QTEST, #QVERIFY, #QVERIFY2, #QWARN, #^, ancestors, #is_a?, #methods, private_slots, #protected_methods, #public_methods, q_classinfo, q_signal, q_slot, signals, #singleton_methods, slots, #|, #~

Constructor Details

#initialize ⇒ ColorItem

Returns a new instance of ColorItem.



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# File 'ext/ruby/qtruby/examples/graphicsview/dragdroprobot/coloritem.rb', line 29

def initialize
    super
    @color = Qt::Color.new(rand(256), rand(256), rand(256))
    setToolTip("Qt::Color(%d, %d, %d)\n%s" %
           [@color.red, @color.green, @color.blue,
           "Click and drag this color onto the robot!"])
    setCursor(Qt::Cursor.new(Qt::OpenHandCursor))
end

Instance Method Details

#boundingRect ⇒ Object 



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# File 'ext/ruby/qtruby/examples/graphicsview/dragdroprobot/coloritem.rb', line 38

def boundingRect
    return Qt::RectF.new(-15.5, -15.5, 34, 34)
end

#mousePressEvent(event) ⇒ Object 



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# File 'ext/ruby/qtruby/examples/graphicsview/dragdroprobot/coloritem.rb', line 51

def mousePressEvent(event)
    if event.button != Qt::LeftButton
        event.ignore
        return
    end

    drag = Qt::Drag.new(event.widget)
    mime = Qt::MimeData.new
    drag.mimeData = mime

    @@n += 1
    if @@n > 2 && rand(3) == 0
        image = Qt::Image.new(":/images/head.png")
        mime.imageData = qVariantFromValue(image)

        drag.pixmap = Qt::Pixmap.fromImage(image.scaled(30, 40))
        drag.setHotSpot(Qt::Point.new(30, 40))
    else
        mime.colorData = qVariantFromValue(@color)
        mime.text = "#%2.2x%2.2x%2.2x" % [@color.red, @color.green, @color.blue]

        pixmap = Qt::Pixmap.new(34, 34)
        pixmap.fill(Qt::Color.new(Qt::transparent))
        painter = Qt::Painter.new(pixmap)
        painter.translate(15, 15)
        painter.renderHint = Qt::Painter::Antialiasing
        paint(painter, 0, 0)
        painter.end
    
        drag.pixmap = pixmap
        drag.hotSpot = Qt::Point.new(15, 20)
    end
    drag.start
end

#paint(painter, option, widget) ⇒ Object 



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# File 'ext/ruby/qtruby/examples/graphicsview/dragdroprobot/coloritem.rb', line 42

def paint(painter, option, widget)
    painter.pen = Qt::NoPen
    painter.brush = Qt::Brush.new(Qt::darkGray)
    painter.drawEllipse(-12, -12, 30, 30)
    painter.pen = Qt::Pen.new(Qt::Brush.new(Qt::black), 1)
    painter.brush = Qt::Brush.new(@color)
    painter.drawEllipse(-15, -15, 30, 30)
end