forked from AuroraMiddleware/gtk
322 lines
9.9 KiB
XML
322 lines
9.9 KiB
XML
<glossary id="glossary">
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<title>Glossary</title>
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<glossentry id="allocation">
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<glossterm>allocation</glossterm>
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<glossdef>
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<para>
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The final size of a <glossterm
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linkend="widget">widget</glossterm> within its <glossterm
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linkend="parent">parent</glossterm>. For example, a widget
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may request a minimum size of 20×20 pixels, but its
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parent may decide to allocate 50×20 pixels for it
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instead.
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</para>
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<glossseealso>
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<glossterm linkend="requisition">requisition</glossterm>
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</glossseealso>
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</glossdef>
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</glossentry>
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<glossentry id="bin">
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<glossterm>bin</glossterm>
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<glossdef>
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<para>
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A <glossterm linkend="container">container</glossterm> that
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can hold at most one child widget. The base class for bins is
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<link linkend="GtkBin">GtkBin</link>.
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</para>
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<glossseealso>
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<glossterm linkend="container">container</glossterm>
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</glossseealso>
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</glossdef>
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</glossentry>
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<glossentry id="child">
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<glossterm>child</glossterm>
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<glossdef>
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<para>
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A <glossterm linkend="container">container's</glossterm> child
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is a <glossterm linkend="widget">widget</glossterm> contained
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inside it.
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</para>
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</glossdef>
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</glossentry>
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<glossentry id="column">
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<glossterm>column</glossterm>
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<glossdef>
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<para>
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FIXME
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</para>
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<glossseealso>model column</glossseealso>
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<glossseealso>view column</glossseealso>
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</glossdef>
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</glossentry>
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<glossentry id="container">
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<glossterm>container</glossterm>
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<glossdef>
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<para>
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A <glossterm linkend="widget">widget</glossterm> that contains
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other widgets; in that case, the container is the
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<emphasis>parent</emphasis> of the <emphasis>child</emphasis>
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widgets. Some containers don't draw anything on their own,
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but rather just organize their children's <glossterm
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linkend="geometry">geometry</glossterm>; for example, <link
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linkend="GtkVBox">GtkVBox</link> lays out its children
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vertically without painting anything on its own. Other
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containers include decorative elements; for example, <link
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linkend="GtkFrame">GtkFrame</link> contains the frame's child
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and a label in addition to the shaded frame it draws. The
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base class for containers is <link
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linkend="GtkContainer">GtkContainer</link>.
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</para>
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<glossseealso>
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<glossterm linkend="container">widget</glossterm>
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<glossterm linkend="container">geometry</glossterm>
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</glossseealso>
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</glossdef>
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</glossentry>
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<glossentry id="display">
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<glossterm>display</glossterm>
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<glossdef>
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<para>
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GDK inherited the concept of display from the X window system,
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which considers a display to be the combination
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of a keyboard, a pointing device and one or more
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<glossterm linkend="screen">screens</glossterm>.
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Applications open a display to show <glossterm
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linkend="window">windows</glossterm> and interact with the user.
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In GDK, a display is represented by a
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<link linkend="GdkDisplay">GdkDisplay</link>.
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</para>
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</glossdef>
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</glossentry>
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<glossentry id="event">
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<glossterm>event</glossterm>
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<glossdef>
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<para>
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FIXME
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</para>
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</glossdef>
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</glossentry>
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<glossentry id="geometry">
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<glossterm>geometry</glossterm>
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<glossdef>
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<para>
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A <glossterm linkend="widget">widget's</glossterm> position
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and size. Within its parent, this is called the widget's
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<glossterm linkend="allocation">allocation</glossterm>.
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</para>
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</glossdef>
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</glossentry>
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<glossentry id="mapping">
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<glossterm>mapping</glossterm>
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<glossdef>
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<para>
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This is the step in a <glossterm
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linkend="widget">widget's</glossterm> life cycle where it
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actually shows the GdkWindows it created when it was
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<glossterm linkend="realization">realized</glossterm>. When a
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widget is mapped, it must turn on its
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<constant>GTK_MAPPED</constant> <link
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linkend="GtkWidgetFlags">flag</link>.
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</para>
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<para>
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Note that due to the asynchronous nature of the X window
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system, a widget's window may not appear on the screen
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immediatly after one calls <link
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linkend="gdk-window-show"><function>gdk_window_show()</function></link>:
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you must wait for the corresponding map <glossterm
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linkend="event">event</glossterm> to be received. You can do
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this with the <link
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linkend="GtkWidget-map-event"><methodname>GtkWidget::map-event</methodname>
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signal</link>.
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</para>
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</glossdef>
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</glossentry>
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<glossentry id="model-column">
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<glossterm>model column</glossterm>
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<glossdef>
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<para>
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FIXME
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</para>
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</glossdef>
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</glossentry>
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<glossentry id="no-window">
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<glossterm>no-window widget</glossterm>
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<glossdef>
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<para>
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A widget that does not have a GdkWindow of its own on which to
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draw its contents, but rather shares its <glossterm
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linkend="parent">parent's</glossterm>. Such a widget has the
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<constant>GTK_NO_WINDOW</constant> <link
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linkend="GtkWidgetFlags">flag</link> set, and can be tested
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with the <link
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linkend="gtk-widget-no-window-caps"><function>GTK_WIDGET_NO_WINDOW()</function></link>
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macro.
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</para>
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</glossdef>
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</glossentry>
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<glossentry id="parent">
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<glossterm>parent</glossterm>
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<glossdef>
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<para>
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A <glossterm linkend="widget">widget's</glossterm> parent is
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the <glossterm linkend="container">container</glossterm>
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inside which it resides.
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</para>
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</glossdef>
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</glossentry>
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<glossentry id="realization">
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<glossterm>realization</glossterm>
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<glossdef>
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<para>
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This is the step in a <glossterm
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linkend="widget">widget's</glossterm> life cycle where it
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creates its own GdkWindow, or otherwise associates itself with
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its <glossterm linkend="parent">parent's</glossterm>
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GdkWindow. If the widget has its own window, then it must
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also attach a <glossterm linkend="style">style</glossterm> to
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it. A widget becomes unrealized by destroying its associated
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GdkWindow. When a widget is realized, it must turn on its
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<constant>GTK_REALIZED</constant> <link
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linkend="GtkWidgetFlags">flag</link>.
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</para>
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<para>
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Widgets that don't own the GdkWindow on which they draw are
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called <glossterm linkend="no-window">no-window
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widgets</glossterm>. This can be tested with the <link
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linkend="gtk-widget-no-window-caps"><function>GTK_WIDGET_NO_WINDOW()</function></link>
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macro. Normally, these widgets draw on their parent's
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GdkWindow.
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</para>
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<para>
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Note that when a widget creates a window in its <link
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linkend="gtkwidget-realize"><methodname>::realize()</methodname></link>
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handler, it does not actually show the window. That is, the
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window's structure is just created in memory. The widget
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actually shows the window when it gets <glossterm
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linkend="mapping">mapped</glossterm>.
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</para>
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</glossdef>
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</glossentry>
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<glossentry id="requisition">
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<glossterm>requisition</glossterm>
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<glossdef>
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<para>
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The size requisition of a <glossterm
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linkend="widget">widget</glossterm> is the minimum amount of
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space it requests from its <glossterm
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linkend="parent">parent</glossterm>. Once the parent computes
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the widget's final size, it gives it its <glossterm
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linkend="allocation">size allocation</glossterm>.
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</para>
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<glossseealso>
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<glossterm linkend="allocation">allocation</glossterm>
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</glossseealso>
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</glossdef>
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</glossentry>
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<glossentry id="screen">
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<glossterm>screen</glossterm>
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<glossdef>
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<para>
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GDK inherited the concept of screen from the X window system,
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which considers a screen to be a rectangular area, on which
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applications may place their windows. Each screen has a
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<glossterm linkend="rootwindow">root window</glossterm> which
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defines the area of the screen. Screens under X may have quite
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dissimilar <glossterm linkend="visual">visuals</visuals>.
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Each screen can stretch across multiple physical monitors.
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In GDK, screens are represented by
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<link linkend="GdkScreen">GdkScreen</link> objects.
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</glossdef>
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</glossentry>
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<glossentry id="style">
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<glossterm>style</glossterm>
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<glossdef>
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<para>
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FIXME
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</para>
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</glossdef>
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</glossentry>
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<glossentry id="toplevel">
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<glossterm>toplevel</glossterm>
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<glossdef>
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<para>
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A <glossterm linkend="widget">widget</glossterm> that does not
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require a <glossterm linkend="parent">parent</glossterm>
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container. The only toplevel widget in GTK+ is <link
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linkend="GtkWindow">GtkWindow</link>.
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</para>
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<glossseealso>
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<glossterm linkend="container">container</glossterm>
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</glossseealso>
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</glossdef>
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</glossentry>
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<glossentry id="unmap">
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<glossterm>unmap</glossterm>
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<glosssee><glossterm linkend="mapping">mapping</glossterm></glosssee>
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</glossentry>
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<glossentry id="unrealize">
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<glossterm>unrealize</glossterm>
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<glosssee><glossterm linkend="realization">realization</glossterm></glosssee>
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</glossentry>
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<glossentry id="view-column">
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<glossterm>view column</glossterm>
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<glossdef>
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<para>
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FIXME
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</para>
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</glossdef>
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</glossentry>
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<glossentry id="widget">
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<glossterm>widget</glossterm>
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<glossdef>
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<para>
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A control in a graphical user interface. Widgets can draw
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themselves and process events from the mouse and keyboard.
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Widget types include buttons, menus, text entry lines, and
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lists. Widgets can be arranged into <glossterm
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linkend="container">containers</glossterm>, and these take
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care of assigning the <glossterm
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linkend="geometry">geometry</glossterm> of the widgets: every
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widget thus has a parent except those widgets which are
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<glossterm linkend="toplevel">toplevels</glossterm>. The base
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class for widgets is <link
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linkend="GtkWidget">GtkWidget</link>.
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</para>
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<glossseealso>
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<glossterm linkend="container">container</glossterm>
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</glossseealso>
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</glossdef>
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</glossentry>
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</glossary>
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<!--
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Local variables:
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mode: sgml
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sgml-parent-document: ("gtk-docs.sgml" "book" "glossary")
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End:
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-->
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