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| - | In this part of the PyGTK programming tutorial, we will introduce dialogs.
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| - | Dialog windows or dialogs are an indispensable part of most modern GUI applications. A dialog is defined as a conversation between two or more persons. In a computer application a dialog is a window which is used to "talk" to the application. And vice versa. A dialog is used to input data, modify data, change the application settings etc. Dialogs are important means of communication between a user and a computer program.
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| - | == Message dialogs ==
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| - | Message dialogs are convenient dialogs that provide messages to the user of the application. The message consists of textual and image data.
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| - | <source lang="python">
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| - | #!/usr/bin/python
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| - | # ZetCode PyGTK tutorial
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| - | #
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| - | # This example shows message
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| - | # dialogs
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| - | #
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| - | # author: jan bodnar
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| - | # website: zetcode.com
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| - | # last edited: February 2009
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| - | import gtk
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| - | class PyApp(gtk.Window):
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| - | def __init__(self):
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| - | super(PyApp, self).__init__()
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| - | self.set_size_request(250, 100)
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| - | self.set_position(gtk.WIN_POS_CENTER)
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| - | self.connect("destroy", gtk.main_quit)
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| - | self.set_title("Message dialogs")
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| - | table = gtk.Table(2, 2, True);
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| - | info = gtk.Button("Information")
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| - | warn = gtk.Button("Warning")
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| - | ques = gtk.Button("Question")
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| - | erro = gtk.Button("Error")
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| - | info.connect("clicked", self.on_info)
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| - | warn.connect("clicked", self.on_warn)
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| - | ques.connect("clicked", self.on_ques)
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| - | erro.connect("clicked", self.on_erro)
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| - | table.attach(info, 0, 1, 0, 1)
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| - | table.attach(warn, 1, 2, 0, 1)
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| - | table.attach(ques, 0, 1, 1, 2)
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| - | table.attach(erro, 1, 2, 1, 2)
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| - | self.add(table)
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| - | self.show_all()
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| - | def on_info(self, widget):
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| - | md = gtk.MessageDialog(self,
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| - | gtk.DIALOG_DESTROY_WITH_PARENT, gtk.MESSAGE_INFO,
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| - | gtk.BUTTONS_CLOSE, "Download completed")
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| - | md.run()
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| - | md.destroy()
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| - | def on_erro(self, widget):
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| - | md = gtk.MessageDialog(self,
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| - | gtk.DIALOG_DESTROY_WITH_PARENT, gtk.MESSAGE_ERROR,
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| - | gtk.BUTTONS_CLOSE, "Error loading file")
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| - | md.run()
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| - | md.destroy()
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| - | def on_ques(self, widget):
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| - | md = gtk.MessageDialog(self,
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| - | gtk.DIALOG_DESTROY_WITH_PARENT, gtk.MESSAGE_QUESTION,
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| - | gtk.BUTTONS_CLOSE, "Are you sure to quit?")
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| - | md.run()
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| - | md.destroy()
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| - | def on_warn(self, widget):
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| - | md = gtk.MessageDialog(self,
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| - | gtk.DIALOG_DESTROY_WITH_PARENT, gtk.MESSAGE_WARNING,
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| - | gtk.BUTTONS_CLOSE, "Unallowed operation")
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| - | md.run()
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| - | md.destroy()
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| - | PyApp()
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| - | gtk.main()
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| - | </source>
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| - | In our example, we will show four kinds of message dialogs. Information, Warning, Question and Error message dialogs.
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| - | <source lang="python">
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| - | info = gtk.Button("Information")
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| - | warn = gtk.Button("Warning")
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| - | ques = gtk.Button("Question")
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| - | erro = gtk.Button("Error")
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| - | </source>
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| - | We have four buttons. Each of these buttons will show a different kind of message dialog.
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| - | <source lang="python">
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| - | md = gtk.MessageDialog(self,
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| - | gtk.DIALOG_DESTROY_WITH_PARENT, gtk.MESSAGE_INFO,
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| - | gtk.BUTTONS_CLOSE, "Download completed")
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| - | md.run()
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| - | md.destroy()
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| - | </source>
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| - | If we click on the info button, the Information dialog is displayed. The <b>MESSAGE_INFO</b> specifies the type of the dialog. The <b>BUTTONS_CLOSE</b> specifies the button to be displayed in the dialog. The last parameter is the message dislayed. The dialog is displayed with the <b>run()</b> method. The programmer must also call either the <b>destroy()</b> or the <b>hide()</b> method.
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| - | <center>
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| - | {|
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| - | |-
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| - | | [[image: pygtk_faq_information.png | center]]
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| - | | [[image: pygtk_faq_warning.png | center]]
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| - | |-
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| - | | [[image: pygtk_faq_question.png | center]]
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| - | | [[image: pygtk_faq_error.png | center]]
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| - | |}
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| - | </center>
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| - | == AboutDialog ==
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| - | The <b>AboutDialog</b> displays information about the application.
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| - | <b>AboutDialog</b> can display a logo, the name of the application, version, copyright, website or licence information. It is also possible to give credits to the authors, documenters, translators and artists.
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| - | <source lang="python">
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| - | #!/usr/bin/python
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| - | # ZetCode PyGTK tutorial
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| - | #
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| - | # This example demonstrates the
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| - | # AboutDialog dialog
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| - | #
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| - | # author: jan bodnar
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| - | # website: zetcode.com
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| - | # last edited: February 2009
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| - | import gtk
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| - | class PyApp(gtk.Window):
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| - | def __init__(self):
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| - | super(PyApp, self).__init__()
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| - | self.set_size_request(300, 150)
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| - | self.set_position(gtk.WIN_POS_CENTER)
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| - | self.connect("destroy", gtk.main_quit)
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| - | self.set_title("About battery")
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| - | button = gtk.Button("About")
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| - | button.set_size_request(80, 30)
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| - | button.connect("clicked", self.on_clicked)
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| - | fix = gtk.Fixed()
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| - | fix.put(button, 20, 20)
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| - | self.add(fix)
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| - | self.show_all()
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| - | def on_clicked(self, widget):
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| - | about = gtk.AboutDialog()
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| - | about.set_program_name("Battery")
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| - | about.set_version("0.1")
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| - | about.set_copyright("(c) Jan Bodnar")
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| - | about.set_comments("Battery is a simple tool for battery checking")
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| - | about.set_website("http://www.zetcode.com")
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| - | about.set_logo(gtk.gdk.pixbuf_new_from_file("battery.png"))
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| - | about.run()
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| - | about.destroy()
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| - | PyApp()
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| - | gtk.main()
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| - | </source>
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| - | The code example uses a <b>AboutDialog</b> with some of it's features.
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| - | <source lang="python">
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| - | about = gtk.AboutDialog()
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| - | </source>
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| - | We create an <b>AboutDialog</b>.
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| - | <source lang="python">
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| - | about = gtk.AboutDialog()
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| - | about.set_program_name("Battery")
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| - | about.set_version("0.1")
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| - | about.set_copyright("(c) Jan Bodnar")
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| - | </source>
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| - | We specify the name, version and the copyright.
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| - | <source lang="python">
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| - | about.set_logo(gtk.gdk.pixbuf_new_from_file("battery.png"))
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| - | </source>
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| - | This line creates a logo.
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| - | [[image: pygtk_faq_about.png | center]]
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| - | == FontSelectionDialog ==
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| - | The <b>FontSelectionDialog</b> is a dialog for selecting fonts. It is typically used in applications, that do some text editing or formatting.
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| - | <source lang="python">
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| - | #!/usr/bin/python
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| - | # ZetCode PyGTK tutorial
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| - | #
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| - | # This example works with the
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| - | # FontSelection dialog
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| - | #
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| - | # author: jan bodnar
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| - | # website: zetcode.com
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| - | # last edited: February 2009
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| - |
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| - | import gtk
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| - | import pango
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| - | class PyApp(gtk.Window):
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| - | def __init__(self):
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| - | gtk.Window.__init__(self)
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| - | self.set_size_request(300, 150)
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| - | self.set_position(gtk.WIN_POS_CENTER)
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| - | self.connect("destroy", gtk.main_quit)
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| - | self.set_title("Font Selection Dialog")
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| - | self.label = gtk.Label("The only victory over love is flight.")
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| - | button = gtk.Button("Select font")
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| - | button.connect("clicked", self.on_clicked)
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| - | fix = gtk.Fixed()
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| - | fix.put(button, 100, 30)
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| - | fix.put(self.label, 30, 90)
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| - | self.add(fix)
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| - | self.show_all()
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| - | def on_clicked(self, widget):
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| - | fdia = gtk.FontSelectionDialog("Select font name")
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| - | response = fdia.run()
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| - | if response == gtk.RESPONSE_OK:
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| - | font_desc = pango.FontDescription(fdia.get_font_name())
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| - | if font_desc:
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| - | self.label.modify_font(font_desc)
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| - | fdia.destroy()
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| - | PyApp()
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| - | gtk.main()
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| - | </source>
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| - | In the code example, we have a button and a label. We show the <b>FontSelectionDialog</b> by clicking on the button.
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| - | <source lang="python">
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| - | fdia = gtk.FontSelectionDialog("Select font name")
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| - | </source>
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| - | We create the <b>FontSelectionDialog.</b>
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| - | <source lang="python">
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| - | if response == gtk.RESPONSE_OK:
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| - | font_desc = pango.FontDescription(fdia.get_font_name())
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| - | if font_desc:
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| - | self.label.modify_font(font_desc)
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| - | </source>
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| - | If we click on the OK button, the font of the label widget changes to the one, that we selected in the dialog.
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| - | [[image: pygtk_faq_fontdialog.png | center]]
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| - | == ColorSelectionDialog ==
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| - | <b>ColorSelectionDialog</b> is a dialog for selecting a color.
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| - | <source lang="python">
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| - | #!/usr/bin/python
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| - | # ZetCode PyGTK tutorial
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| - | #
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| - | # This example works with the
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| - | # ColorSelection dialog
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| - | #
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| - | # author: jan bodnar
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| - | # website: zetcode.com
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| - | # last edited: February 2009
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| - | import gtk
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| - | class PyApp(gtk.Window):
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| - | def __init__(self):
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| - | super(PyApp, self).__init__()
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| - | self.set_size_request(300, 150)
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| - | self.set_position(gtk.WIN_POS_CENTER)
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| - | self.connect("destroy", gtk.main_quit)
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| - | self.set_title("Color Selection Dialog")
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| - | self.label = gtk.Label("The only victory over love is flight.")
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| - | button = gtk.Button("Select color")
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| - | button.connect("clicked", self.on_clicked)
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| - | fix = gtk.Fixed()
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| - | fix.put(button, 100, 30)
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| - | fix.put(self.label, 30, 90)
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| - | self.add(fix)
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| - | self.show_all()
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| - | def on_clicked(self, widget):
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| - | cdia = gtk.ColorSelectionDialog("Select color")
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| - | response = cdia.run()
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| - | if response == gtk.RESPONSE_OK:
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| - | colorsel = cdia.colorsel
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| - | color = colorsel.get_current_color()
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| - | self.label.modify_fg(gtk.STATE_NORMAL, color)
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| - | cdia.destroy()
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| - | PyApp()
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| - | gtk.main()
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| - | </source>
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| - | The example is very similar to the previous one. This time we change the color of the label.
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| - | <source lang="python">
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| - | cdia = gtk.ColorSelectionDialog("Select color")
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| - | </source>
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| - | We create the <b>ColorSelectionDialog</b>.
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| - | <source lang="python">
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| - | if response == gtk.RESPONSE_OK:
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| - | colorsel = cdia.colorsel
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| - | color = colorsel.get_current_color()
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| - | self.label.modify_fg(gtk.STATE_NORMAL, color)
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| - | </source>
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| - | If the user pressed OK, we get the color and modify the label's color.
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| - |
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| - | [[image: pygtk_faq_colordialog.png | center]]
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| - | In this part of the PyGTK programming tutorial, we worked with PyGTK built-in dialogs.
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| - | [[Категория:Python]]
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| - | [[Категория:GTK+]]
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