forked from AuroraMiddleware/gtk
407 lines
9.7 KiB
Plaintext
407 lines
9.7 KiB
Plaintext
<!-- ##### SECTION Title ##### -->
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GtkDialog
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<!-- ##### SECTION Short_Description ##### -->
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Create popup windows
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<!-- ##### SECTION Long_Description ##### -->
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<para>
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Dialog boxes are a convenient way to prompt the user for a small amount of
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input, e.g. to display a message, ask a question, or anything else that does
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not require extensive effort on the user's part.
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</para>
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<para>
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GTK+ treats a dialog as a window split vertically. The top section is a
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#GtkVBox known as the <structfield>content_area</structfield>, and is
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where widgets such as a #GtkLabel or a #GtkEntry should be packed.
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The bottom area is known as the <structfield>action_area</structfield>.
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This is generally used for packing buttons into the dialog which may
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perform functions such as cancel, ok, or apply.
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</para>
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<para>
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GtkDialog boxes are created with a call to gtk_dialog_new() or
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gtk_dialog_new_with_buttons(). gtk_dialog_new_with_buttons() is recommended;
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it allows you to set the dialog title, some convenient flags, and add simple
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buttons.
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</para>
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<para>
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If 'dialog' is a newly created dialog, the two primary areas of the window
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can be accessed through gtk_dialog_get_content_area() and
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gtk_dialog_get_action_area(), as can be seen from the example, below.
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</para>
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<para>
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A 'modal' dialog (that is, one which freezes the rest of the application from
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user input), can be created by calling gtk_window_set_modal() on the dialog. Use
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the GTK_WINDOW() macro to cast the widget returned from gtk_dialog_new() into a
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#GtkWindow. When using gtk_dialog_new_with_buttons() you can also pass the
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#GTK_DIALOG_MODAL flag to make a dialog modal.
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</para>
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<para>
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If you add buttons to #GtkDialog using gtk_dialog_new_with_buttons(),
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gtk_dialog_add_button(), gtk_dialog_add_buttons(), or
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gtk_dialog_add_action_widget(), clicking the button will emit a signal called
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"response" with a response ID that you specified. GTK+ will never assign a
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meaning to positive response IDs; these are entirely user-defined. But for
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convenience, you can use the response IDs in the #GtkResponseType enumeration
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(these all have values less than zero). If a dialog receives a delete event,
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the "response" signal will be emitted with a response ID of #GTK_RESPONSE_DELETE_EVENT.
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</para>
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<para>
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If you want to block waiting for a dialog to return before returning control
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flow to your code, you can call gtk_dialog_run(). This function enters a
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recursive main loop and waits for the user to respond to the dialog, returning the
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response ID corresponding to the button the user clicked.
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</para>
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<para>
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For the simple dialog in the following example, in reality you'd probably use
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#GtkMessageDialog to save yourself some effort. But you'd need to create the
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dialog contents manually if you had more than a simple message in the dialog.
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<example>
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<title>Simple <structname>GtkDialog</structname> usage.</title>
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<programlisting>
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/* Function to open a dialog box displaying the message provided. */
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void quick_message (gchar *message) {
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GtkWidget *dialog, *label, *content_area;
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/* Create the widgets */
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dialog = gtk_dialog_new_with_buttons ("Message",
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main_application_window,
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GTK_DIALOG_DESTROY_WITH_PARENT,
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GTK_STOCK_OK,
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GTK_RESPONSE_NONE,
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NULL);
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content_area = gtk_dialog_get_content_area (GTK_DIALOG (dialog));
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label = gtk_label_new (message);
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/* Ensure that the dialog box is destroyed when the user responds. */
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g_signal_connect_swapped (dialog,
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"response",
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G_CALLBACK (gtk_widget_destroy),
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dialog);
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/* Add the label, and show everything we've added to the dialog. */
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gtk_container_add (GTK_CONTAINER (content_area), label);
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gtk_widget_show_all (dialog);
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}
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</programlisting>
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</example>
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</para>
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<refsect2 id="GtkDialog-BUILDER-UI"><title>GtkDialog as GtkBuildable</title>
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<para>
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The GtkDialog implementation of the GtkBuildable interface exposes the
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@vbox and @action_area as internal children with the names "vbox" and
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"action_area".
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</para>
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<para>
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GtkDialog supports a custom <action-widgets> element, which
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can contain multiple <action-widget> elements. The "response"
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attribute specifies a numeric response, and the content of the element
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is the id of widget (which should be a child of the dialogs @action_area).
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</para>
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<example>
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<title>A <structname>GtkDialog</structname> UI definition fragment.</title>
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<programlisting><![CDATA[
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<object class="GtkDialog" id="dialog1">
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<child internal-child="vbox">"
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<object class="GtkVBox" id="vbox">
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<child internal-child="action_area">
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<object class="GtkHButtonBox" id="button_box">
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<child>
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<object class="GtkButton" id="button_cancel"/>
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</child>
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<child>
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<object class="GtkButton" id="button_ok"/>
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</child>
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</object>
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</child>
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</object>
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</child>
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<action-widgets>
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<action-widget response="3">button_ok</action-widget>
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<action-widget response="-5">button_cancel</action-widget>
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</action-widgets>
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</object>
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]]></programlisting>
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</example>
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</refsect2>
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<!-- ##### SECTION See_Also ##### -->
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<para>
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<variablelist>
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<varlistentry>
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<term>#GtkVBox</term>
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<listitem><para>Pack widgets vertically.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term>#GtkWindow</term>
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<listitem><para>Alter the properties of your dialog box.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term>#GtkButton</term>
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<listitem><para>Add them to the <structfield>action_area</structfield> to get a
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response from the user.</para></listitem>
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</varlistentry>
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</variablelist>
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</para>
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<!-- ##### SECTION Stability_Level ##### -->
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<!-- ##### SECTION Image ##### -->
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<!-- ##### STRUCT GtkDialog ##### -->
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<para>
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<structfield>vbox</structfield> is a #GtkVBox - the main part of the
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dialog box.
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</para>
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<para>
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<structfield>action_area</structfield> is a #GtkHButtonBox packed below the
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dividing #GtkHSeparator in the dialog. It is treated exactly the same
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as any other #GtkHButtonBox.
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</para>
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<!-- ##### SIGNAL GtkDialog::close ##### -->
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<para>
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</para>
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@dialog: the object which received the signal.
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<!-- ##### SIGNAL GtkDialog::response ##### -->
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<para>
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</para>
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@dialog:
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@arg1:
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<!-- ##### ARG GtkDialog:action-area-border ##### -->
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<para>
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</para>
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<!-- ##### ARG GtkDialog:button-spacing ##### -->
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<para>
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</para>
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<!-- ##### ARG GtkDialog:content-area-border ##### -->
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<para>
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</para>
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<!-- ##### ARG GtkDialog:content-area-spacing ##### -->
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<para>
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</para>
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<!-- ##### ENUM GtkDialogFlags ##### -->
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<para>
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Flags used to influence dialog construction.
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</para>
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@GTK_DIALOG_MODAL: Make the constructed dialog modal,
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see gtk_window_set_modal().
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@GTK_DIALOG_DESTROY_WITH_PARENT: Destroy the dialog when its
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parent is destroyed, see gtk_window_set_destroy_with_parent().
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<!-- ##### ENUM GtkResponseType ##### -->
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<para>
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Predefined values for use as response ids in gtk_dialog_add_button().
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All predefined values are negative, GTK+ leaves positive values for
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application-defined response ids.
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</para>
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@GTK_RESPONSE_NONE: Returned if an action widget has no response id, or if
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the dialog gets programmatically hidden or destroyed.
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@GTK_RESPONSE_REJECT: Generic response id, not used by GTK+ dialogs.
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@GTK_RESPONSE_ACCEPT: Generic response id, not used by GTK+ dialogs.
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@GTK_RESPONSE_DELETE_EVENT: Returned if the dialog is deleted.
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@GTK_RESPONSE_OK: Returned by OK buttons in GTK+ dialogs.
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@GTK_RESPONSE_CANCEL: Returned by Cancel buttons in GTK+ dialogs.
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@GTK_RESPONSE_CLOSE: Returned by Close buttons in GTK+ dialogs.
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@GTK_RESPONSE_YES: Returned by Yes buttons in GTK+ dialogs.
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@GTK_RESPONSE_NO: Returned by No buttons in GTK+ dialogs.
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@GTK_RESPONSE_APPLY: Returned by Apply buttons in GTK+ dialogs.
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@GTK_RESPONSE_HELP: Returned by Help buttons in GTK+ dialogs.
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<!-- ##### FUNCTION gtk_dialog_new ##### -->
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<para>
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Creates a new dialog box. Widgets should not be packed into this #GtkWindow
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directly, but into the @vbox and @action_area, as described above.
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</para>
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@void:
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@Returns: a new #GtkDialog.
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<!-- ##### FUNCTION gtk_dialog_new_with_buttons ##### -->
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<para>
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</para>
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@title:
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@parent:
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@flags:
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@first_button_text:
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@Varargs:
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@Returns:
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<!-- ##### FUNCTION gtk_dialog_run ##### -->
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<para>
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</para>
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@dialog:
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@Returns:
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<!-- ##### FUNCTION gtk_dialog_response ##### -->
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<para>
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</para>
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@dialog:
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@response_id:
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<!-- ##### FUNCTION gtk_dialog_add_button ##### -->
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<para>
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</para>
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@dialog:
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@button_text:
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@response_id:
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@Returns:
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<!-- ##### FUNCTION gtk_dialog_add_buttons ##### -->
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<para>
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</para>
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@dialog:
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@first_button_text:
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@Varargs:
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<!-- ##### FUNCTION gtk_dialog_add_action_widget ##### -->
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<para>
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</para>
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@dialog:
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@child:
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@response_id:
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<!-- ##### FUNCTION gtk_dialog_set_default_response ##### -->
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<para>
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</para>
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@dialog:
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@response_id:
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<!-- ##### FUNCTION gtk_dialog_set_response_sensitive ##### -->
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<para>
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</para>
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@dialog:
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@response_id:
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@setting:
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<!-- ##### FUNCTION gtk_dialog_get_response_for_widget ##### -->
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<para>
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</para>
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@dialog:
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@widget:
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@Returns:
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<!-- ##### FUNCTION gtk_dialog_get_widget_for_response ##### -->
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<para>
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</para>
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@dialog:
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@response_id:
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@Returns:
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<!-- ##### FUNCTION gtk_dialog_get_action_area ##### -->
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<para>
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</para>
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@dialog:
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@Returns:
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<!-- ##### FUNCTION gtk_dialog_get_content_area ##### -->
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<para>
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</para>
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@dialog:
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@Returns:
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<!-- ##### FUNCTION gtk_alternative_dialog_button_order ##### -->
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<para>
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</para>
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@screen:
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@Returns:
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<!-- ##### FUNCTION gtk_dialog_set_alternative_button_order ##### -->
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<para>
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</para>
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@dialog:
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@first_response_id:
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@Varargs:
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<!-- ##### FUNCTION gtk_dialog_set_alternative_button_order_from_array ##### -->
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<para>
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</para>
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@dialog:
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@n_params:
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@new_order:
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