Archive:Development/Languages/Ruby (zh TW)

cleanup

#!/usr/bin/ruby -w
require 'Qt4'
a = Qt::Application.new(ARGV)
hello = Qt::PushButton.new("Hello World!")
hello.resize(100, 30)
hello.show
a.exec

require 'Qt4'

Qt::Application.new(ARGV) do
    Qt::Widget.new do

        self.window_title = 'Hello QtRuby v1.0'
        resize(200, 100)

        button = Qt::PushButton.new('Quit') do
            connect(SIGNAL :clicked) { Qt::Application.instance.quit }
        end

        label = Qt::Label.new('<big>Hello Qt in the Ruby way!</big>')

        self.layout = Qt::VBoxLayout.new do
            add_widget(label, 0, Qt::AlignCenter)
            add_widget(button, 0, Qt::AlignRight)
        end

        show
    end

    exec
end

create_standard_status_bar_action()
createStandardStatusBarAction()

p1 = Qt::Point.new(5,5)   => (5, 5)
p2 = Qt::Point.new(20,20) => (20, 20)
p1 + p2                   => (25, 25)

slots 'setColor(QColor)', 'slotLoad(const QString&)'..
signals 'clicked()'..

slots :slotLoad
signals :clicked

Qt::Object.connect( @colormenu, SIGNAL( "activated(int)" ),
                  self, SLOT( "slotColorMenu(int)" ) )

quit_button.connect(SIGNAL :clicked) { $qApp.quit }

emit colorChanged( black )

quit = Qt::PushButton.new("Quit", self, "quit")

w = MyWidget.new { setCaption("foobar") }

w = MyWidget.new(nil) { setCaption("foobar") }

w = MyWidget.new { |theWidget| theWidget.setCaption "foobar" }

item2.dispose
if item2.disposed?
puts "item2 is disposed"
end

# static Ptr findByFileContent( const QString &fileName, 
#                               int *accuracy=0 );

acc = Qt::Integer.new(0)
fc = KDE::MimeType.findByFileContent("mimetype.rb", acc)

# QFont getFont(bool * ok, const QFont&initial, 
#               QWidget* parent = 0, const char *name = 0);		

ok = Qt::Boolean.new
font = Qt::FontDialog.getFont(ok, 
                    Qt::Font.new("Helvetica [Cronyx]", 10), 
                    self)
if !ok.nil? 
# font is set to the font the user selected
else 
# the user canceled the dialog
end

a = Qt::Application.new(ARGV)
Qt.debug_level = Qt::DebugLevel::High
a.loadLibrary("foo")  # Non existent method

      classname    == QApplication
      :: method == loadLibrary$
      -> methodIds == []
      candidate list:
      Possible prototypes:
          static QWidget* QApplication::widgetAt(int, int, bool)
			...

Qt::Internal::setDebug(Qt::QtDebugChannel::QTDB_VIRTUAL)

Qt::Internal::setDebug(Qt::QtDebugChannel::QTDB_GC)

$ rbuic mainform.ui -x -o mainform.rb

if $0 == __FILE__
    a = Qt::Application.new(ARGV)
    w = MainForm.new
    w.show
    a.exec
end

      $ ruby mainform.rb

$ rbuic4 -x -kde knotifywidgetbase.ui -o knotifywidgetbase.rb

if $0 == __FILE__
    about = KDE::AboutData.new("knotifywidgetbase", 
 		                       "KNotifyWidgetBase", "0.1")
    KDE::CmdLineArgs.init(ARGV, about)
    a = KDE::Application.new()
    w = KNotifyWidgetBase.new
    w.show
    a.exec
end

      require 'Qt4'
      require 'quiloader'

      a = Qt::Application.new(ARGV)
      if ARGV.length == 0
        exit
      end

      if ARGV.length == 2
        QUI::WidgetFactory.loadImages ARGV[0]
        w = QUI::WidgetFactory.create ARGV[1]
        if w.nil?
          exit
        end
        w.show()
        a.connect(a, SIGNAL('lastWindowClosed()'), a, SLOT('quit()'))
        a.exec()
      end

      require 'Qt4'
      require 'qtuitools'

      a = Qt::Application.new(ARGV)
      if ARGV.length == 0
        exit
      end

      if ARGV.length == 1
        file = Qt::File.new(ARGV[1])
        file.open(Qt::File::ReadOnly)

        loader = Qt::UiLoader.new
        window = loader.load(file, nil)
        file.close

        if (window.nil?)
          print "Error. Window is nil.\n"
          exit
        end
        window.show
        a.connect(a, SIGNAL('lastWindowClosed()'), a, SLOT('quit()'))
        a.exec
      end

$ rbqtapi Qt::TextEdit

$ rbqtapi -rsetCaption

require 'Qt4'

require 'korundum4'

$ rbkdeapi KDE::Action

#qtruby
#kde-ruby

Archive:Development/Languages/Ruby (zh TW)

QtRuby

目前 API 範圍概覽

可用呼叫

虛擬（virtual）方法

屬性

使用 CamelCase 或小寫加底線的名稱都可以

運算子重載

宣告訊號（Signals）和槽（Slots）

建構子

垃圾回收

C++ 'int*' 和 'int&' 參數型態

C++ 'bool*' 和 'bool&' 參數型態

C++ (const )(unsigned )char* 參數型態

C++ unsigned char* 函式

除錯

字串 i18n

其他功能和產品

Qt Designer

Loading .ui files at runtime with Qt::UILoader

API 參考

範例程式

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