Create a popup layout description.
Used together with [methodGdk.Popup.present] to describe how a popup
surface should be placed and behave on-screen.
anchor_rect is relative to the top-left corner of the surface's parent.
rect_anchor and surface_anchor determine anchor points on anchor_rect
and surface to pin together.
The position of anchor_rect's anchor point can optionally be offset using
[methodGdk.PopupLayout.set_offset], which is equivalent to offsetting the
position of surface.
the anchor GdkRectangle to align surface with
the point on anchor_rect to align with surface's anchor point
the point on surface to align with rect's anchor point
Makes a copy of layout.
Check whether layout and other has identical layout properties.
another GdkPopupLayout
Get the GdkAnchorHints.
Retrieves the offset for the anchor rectangle.
Obtains the shadow widths of this layout.
Increases the reference count of value.
Set new anchor hints.
The set anchor_hints determines how surface will be moved
if the anchor points cause it to move off-screen. For example,
%GDK_ANCHOR_FLIP_X will replace %GDK_GRAVITY_NORTH_WEST with
%GDK_GRAVITY_NORTH_EAST and vice versa if surface extends
beyond the left or right edges of the monitor.
the new GdkAnchorHints
Offset the position of the anchor rectangle with the given delta.
x delta to offset the anchor rectangle with
y delta to offset the anchor rectangle with
Sets the shadow width of the popup.
The shadow width corresponds to the part of the computed surface size that would consist of the shadow margin surrounding the window, would there be any.
width of the left part of the shadow
width of the right part of the shadow
height of the top part of the shadow
height of the bottom part of the shadow
Decreases the reference count of value.
Create a popup layout description.
Used together with [methodGdk.Popup.present] to describe how a popup
surface should be placed and behave on-screen.
anchor_rect is relative to the top-left corner of the surface's parent.
rect_anchor and surface_anchor determine anchor points on anchor_rect
and surface to pin together.
The position of anchor_rect's anchor point can optionally be offset using
[methodGdk.PopupLayout.set_offset], which is equivalent to offsetting the
position of surface.
the anchor GdkRectangle to align surface with
the point on anchor_rect to align with surface's anchor point
the point on surface to align with rect's anchor point
The
GdkPopupLayoutstruct contains information that is necessary position a [ifaceGdk.Popup] relative to its parent.The positioning requires a negotiation with the windowing system, since it depends on external constraints, such as the position of the parent surface, and the screen dimensions.
The basic ingredients are a rectangle on the parent surface, and the anchor on both that rectangle and the popup. The anchors specify a side or corner to place next to each other.
For cases where placing the anchors next to each other would make the popup extend offscreen, the layout includes some hints for how to resolve this problem. The hints may suggest to flip the anchor position to the other side, or to 'slide' the popup along a side, or to resize it.
These hints may be combined.
Ultimatively, it is up to the windowing system to determine the position and size of the popup. You can learn about the result by calling [method
Gdk.Popup.get_position_x], [methodGdk.Popup.get_position_y], [methodGdk.Popup.get_rect_anchor] and [methodGdk.Popup.get_surface_anchor] after the popup has been presented. This can be used to adjust the rendering. For example, [classGtk.Popover] changes its arrow position accordingly. But you have to be careful avoid changing the size of the popover, or it has to be presented again.