Picture
The GtkPicture widget displays a GdkPaintable.
Many convenience functions are provided to make pictures simple to use. For example, if you want to load an image from a file, and then display it, there’s a convenience function to do this:
GtkWidget *widget = gtk_picture_new_for_filename ("myfile.png");If the file isn’t loaded successfully, the picture will contain a “broken image” icon similar to that used in many web browsers. If you want to handle errors in loading the file yourself, for example by displaying an error message, then load the image with ctor@Gdk.Texture.new_from_file, then create the GtkPicture with ctor@Gtk.Picture.new_for_paintable.
Sometimes an application will want to avoid depending on external data files, such as image files. See the documentation of GResource for details. In this case, ctor@Gtk.Picture.new_for_resource and method@Gtk.Picture.set_resource should be used.
GtkPicture displays an image at its natural size. See class@Gtk.Image if you want to display a fixed-size image, such as an icon.
Sizing the paintable
You can influence how the paintable is displayed inside the GtkPicture by changing property@Gtk.Picture:content-fit. See enum@Gtk.ContentFit for details. property@Gtk.Picture:can-shrink can be unset to make sure that paintables are never made smaller than their ideal size - but be careful if you do not know the size of the paintable in use (like when displaying user-loaded images). This can easily cause the picture to grow larger than the screen. And property@Gtk.Widget:halign and property@Gtk.Widget:valign can be used to make sure the paintable doesn't fill all available space but is instead displayed at its original size.
CSS nodes
GtkPicture has a single CSS node with the name picture.
Accessibility
GtkPicture uses the GTK_ACCESSIBLE_ROLE_IMG role.
Constructors
Creates a new empty GtkPicture widget.
Creates a new GtkPicture displaying the given @file.
Creates a new GtkPicture displaying the file @filename.
Creates a new GtkPicture displaying @paintable.
Creates a new GtkPicture displaying @pixbuf.
Properties
The accessible role of the given GtkAccessible implementation.
The alternative textual description for the picture.
How the content should be resized to fit inside the GtkPicture.
A list of css classes applied to this widget.
Whether the widget should grab focus when it is clicked with the mouse.
Enables or disables the emission of the ::query-tooltip signal on @widget.
Whether to use the hexpand property.
Whether the GtkPicture will render its contents trying to preserve the aspect ratio.
The GtkLayoutManager instance to use to compute the preferred size of the widget, and allocate its children.
Margin on bottom side of widget.
Margin on start of widget, horizontally.
Whether the widget will receive the default action when it is focused.
The scale factor of the widget.
Sets the text of tooltip to be the given string, which is marked up with Pango markup.
Sets the text of tooltip to be the given string.
Whether to use the vexpand property.
Functions
Enable or disable an action installed with gtk_widget_class_install_action().
Looks up the action in the action groups associated with
Activates the default.activate action from @widget.
Adds @controller to @widget so that it will receive events.
Adds a style class to @widget.
Adds a widget to the list of mnemonic labels for this widget.
Queues an animation frame update and adds a callback to be called before each frame.
Requests the user's screen reader to announce the given message.
Called by widgets as the user moves around the window using keyboard shortcuts.
Computes the bounds for @widget in the coordinate space of @target.
Computes whether a container should give this widget extra space when possible.
Translates the given @point in @widget's coordinates to coordinates relative to @target’s coordinate system.
Computes a matrix suitable to describe a transformation from
Signals that all holders of a reference to the widget should release the reference that they hold.
Emitted when the text direction of a widget changes.
Emitted when @widget is hidden.
Emitted if keyboard navigation fails.
Emitted when @widget is going to be mapped.
Emitted when a widget is activated via a mnemonic.
Emitted when the focus is moved.
Emitted when @widget is associated with a GdkSurface.
Emitted when @widget is shown.
Emitted when the widget state changes.
Emitted when @widget is going to be unmapped.
Emitted when the GdkSurface associated with @widget is destroyed.
Creates a new PangoLayout with the appropriate font map, font description, and base direction for drawing text for this widget.
Clears the template children for the given widget.
Retrieves the accessible parent for an accessible object.
Retrieves the accessible role of an accessible object.
Returns the baseline that has currently been allocated to @widget.
Returns the height that has currently been allocated to @widget.
Returns the width that has currently been allocated to @widget.
Gets the alternative textual description of the picture.
Gets the first ancestor of @widget with type @widget_type.
Retrieves the accessible implementation for the given GtkAccessible.
Returns the baseline that has currently been allocated to @widget.
Gets the ID of the @buildable object.
Determines whether the input focus can enter @widget or any of its children.
Returns whether the GtkPicture respects its contents size.
Queries whether @widget can be the target of pointer events.
Gets the value set with gtk_widget_set_child_visible().
Gets the clipboard object for @widget.
Returns the fit mode for the content of the GtkPicture.
Returns the list of style classes applied to @widget.
Returns the CSS name that is used for @self.
Gets the reading direction for a particular widget.
Get the GdkDisplay for the toplevel window associated with this widget.
Retrieves the first accessible child of an accessible object.
Returns the widget’s first child.
Determines whether @widget can own the input focus.
Returns the current focus child of @widget.
Returns whether the widget should grab focus when it is clicked with the mouse.
Gets the font map of @widget.
Obtains the frame clock for a widget.
Returns the current value of the has-tooltip property.
Gets whether the widget would like any available extra horizontal space.
Gets whether gtk_widget_set_hexpand() has been used to explicitly set the expand flag on this widget.
Returns whether the GtkPicture preserves its contents aspect ratio.
Returns the widget’s last child.
Retrieves the layout manager used by @widget.
Gets the bottom margin of @widget.
Gets the end margin of @widget.
Gets the start margin of @widget.
Gets the top margin of @widget.
Retrieves the next accessible sibling of an accessible object
Returns the widget’s next sibling.
#Fetches the requested opacity for this widget.
Returns the widget’s overflow value.
Gets the GdkPaintable being displayed by the GtkPicture.
Query a platform state, such as focus.
Retrieves the minimum and natural size of a widget, taking into account the widget’s preference for height-for-width management.
Returns the widget’s previous sibling.
Gets the primary clipboard of @widget.
Determines whether @widget is realized.
Determines whether @widget is always treated as the default widget within its toplevel when it has the focus, even if another widget is the default.
Gets whether the widget prefers a height-for-width layout or a width-for-height layout.
Retrieves the internal scale factor that maps from window coordinates to the actual device pixels.
Returns the widget’s sensitivity.
Gets the settings object holding the settings used for this widget.
Returns the content width or height of the widget.
Returns the widget state as a flag set.
Returns the style context associated to @widget.
Fetch an object build from the template XML for @widget_type in this @widget instance.
Gets the contents of the tooltip for @widget.
Gets the contents of the tooltip for @widget.
Gets whether the widget would like any available extra vertical space.
Gets whether gtk_widget_set_vexpand() has been used to explicitly set the expand flag on this widget.
Determines whether the widget is visible.
Returns whether @css_class is currently applied to @widget.
Determines whether @widget is the current default widget within its toplevel.
Determines if the widget should show a visible indication that it has the global input focus.
Returns whether the widget is currently being destroyed.
Creates and initializes child widgets defined in templates.
Inserts @group into @widget.
Inserts @widget into the child widget list of @parent.
Inserts @widget into the child widget list of @parent.
Determines whether @widget is somewhere inside @ancestor, possibly with intermediate containers.
Determines whether @widget can be drawn to.
Returns the widget’s effective sensitivity.
Emits the ::keynav-failed signal on the widget.
Returns the widgets for which this widget is the target of a mnemonic.
Emits the ::mnemonic-activate signal.
Returns a GListModel to track the children of @widget.
Returns a GListModel to track the class@Gtk.EventControllers of @widget.
Flags the widget for a rerun of the vfunc@Gtk.Widget.size_allocate function.
Flags a widget to have its size renegotiated.
Removes @controller from @widget, so that it doesn't process events anymore.
Removes a style from @widget.
Removes a widget from the list of mnemonic labels for this widget.
Removes a tick callback previously registered with gtk_widget_add_tick_callback().
Resets the accessible @property to its default value.
Resets the accessible @relation to its default value.
Resets the accessible @state to its default value.
Sets the parent and sibling of an accessible object.
Sets an alternative textual description for the picture contents.
Specifies whether the input focus can enter the widget or any of its children.
If set to true, the @self can be made smaller than its contents.
Sets whether @widget can be the target of pointer events.
Sets whether @widget should be mapped along with its parent.
Sets how the content should be resized to fit the GtkPicture.
Clear all style classes applied to @widget and replace them with @classes.
Sets a named cursor to be shown when pointer devices point towards @widget.
Sets the reading direction on a particular widget.
Makes @self load and display the given @filename.
Specifies whether @widget can own the input focus.
Set @child as the current focus child of @widget.
Sets whether the widget should grab focus when it is clicked with the mouse.
Sets the font map to use for Pango rendering.
Sets the has-tooltip property on @widget to @has_tooltip.
Sets whether the widget would like any available extra horizontal space.
Sets whether the hexpand flag will be used.
If set to true, the @self will render its contents according to their aspect ratio.
Sets the layout manager delegate instance that provides an implementation for measuring and allocating the children of @widget.
Sets the bottom margin of @widget.
Sets the end margin of @widget.
Set all margins to the same value.
Set start and end margin to horizontal and top and bottom margin to vertical
Set margins.
Sets the start margin of @widget.
Sets the top margin of @widget.
Request the @widget to be rendered partially transparent.
Sets how @widget treats content that is drawn outside the widget's content area.
Makes @self display the given @paintable.
Specifies whether @widget will be treated as the default widget within its toplevel when it has the focus, even if another widget is the default.
Makes @self load and display the resource at the given
Sets the sensitivity of a widget.
Sets the minimum size of a widget.
Turns on flag values in the current widget state.
Sets @markup as the contents of the tooltip, which is marked up with Pango markup.
Sets @text as the contents of the tooltip.
Sets whether the widget would like any available extra vertical space.
Sets whether the vexpand flag will be used.
Sets the visibility state of @widget.
Returns whether @widget should contribute to the measuring and allocation of its parent.
Triggers a tooltip query on the display where the toplevel of @widget is located.
Turns off flag values for the current widget state.
Updates the next accessible sibling of @self.