Struct gdk4::PopupLayout

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pub struct PopupLayout { /* private fields */ }
Expand description

The PopupLayout struct contains information that is necessary position a 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.

Popup anchors

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.

Flipping popups

Sliding popups

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 PopupExt::position_x(), PopupExt::position_y(), PopupExt::rect_anchor() and PopupExt::surface_anchor() after the popup has been presented. This can be used to adjust the rendering. For example, GtkPopover 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.

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impl PopupLayout

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pub fn as_ptr(&self) -> *mut GdkPopupLayout

Return the inner pointer to the underlying C value.

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pub unsafe fn from_glib_ptr_borrow<'a>( ptr: *const *const GdkPopupLayout ) -> &'a Self

Borrows the underlying C value.

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impl PopupLayout

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pub fn new( anchor_rect: &Rectangle, rect_anchor: Gravity, surface_anchor: Gravity ) -> PopupLayout

Create a popup layout description.

Used together with PopupExt::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 set_offset(), which is equivalent to offsetting the position of surface.

§anchor_rect

the anchor Rectangle to align @surface with

§rect_anchor

the point on @anchor_rect to align with @surface’s anchor point

§surface_anchor

the point on @surface to align with @rect’s anchor point

§Returns

newly created instance of PopupLayout

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pub fn copy(&self) -> PopupLayout

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pub fn anchor_hints(&self) -> AnchorHints

Get the AnchorHints.

§Returns

the AnchorHints

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pub fn anchor_rect(&self) -> Rectangle

Get the anchor rectangle.

§Returns

The anchor rectangle

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pub fn rect_anchor(&self) -> Gravity

Returns the anchor position on the anchor rectangle.

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the anchor on the anchor rectangle.

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pub fn shadow_width(&self) -> (i32, i32, i32, i32)

Available on crate feature v4_2 only.

Obtains the shadow widths of this layout.

§Returns
§left

return location for the left shadow width

return location for the right shadow width

§top

return location for the top shadow width

§bottom

return location for the bottom shadow width

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pub fn surface_anchor(&self) -> Gravity

Returns the anchor position on the popup surface.

§Returns

the anchor on the popup surface.

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pub fn set_anchor_hints(&self, anchor_hints: AnchorHints)

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, AnchorHints::FLIP_X will replace Gravity::NorthWest with Gravity::NorthEast and vice versa if @surface extends beyond the left or right edges of the monitor.

§anchor_hints

the new AnchorHints

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pub fn set_anchor_rect(&self, anchor_rect: &Rectangle)

Set the anchor rectangle.

§anchor_rect

the new anchor rectangle

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pub fn set_offset(&self, dx: i32, dy: i32)

Offset the position of the anchor rectangle with the given delta.

§dx

x delta to offset the anchor rectangle with

§dy

y delta to offset the anchor rectangle with

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pub fn set_rect_anchor(&self, anchor: Gravity)

Set the anchor on the anchor rectangle.

§anchor

the new rect anchor

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pub fn set_shadow_width(&self, left: i32, right: i32, top: i32, bottom: i32)

Available on crate feature v4_2 only.

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.

§left

width of the left part of the shadow

§right

width of the right part of the shadow

§top

height of the top part of the shadow

§bottom

height of the bottom part of the shadow

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pub fn set_surface_anchor(&self, anchor: Gravity)

Set the anchor on the popup surface.

§anchor

the new popup surface anchor

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impl PopupLayout

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pub fn offset(&self) -> (i32, i32)

Retrieves the offset for the anchor rectangle.

§Returns
§dx

return location for the delta X coordinate

§dy

return location for the delta Y coordinate

Trait Implementations§

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impl Clone for PopupLayout

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fn clone(&self) -> Self

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for PopupLayout

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl From<PopupLayout> for Value

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fn from(s: PopupLayout) -> Self

Converts to this type from the input type.
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impl HasParamSpec for PopupLayout

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type ParamSpec = ParamSpecBoxed

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type SetValue = PopupLayout

Preferred value to be used as setter for the associated ParamSpec.
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type BuilderFn = fn(_: &str) -> ParamSpecBoxedBuilder<'_, PopupLayout>

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fn param_spec_builder() -> Self::BuilderFn

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impl Hash for PopupLayout

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fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher. Read more
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fn hash_slice<H>(data: &[Self], state: &mut H)
where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher. Read more
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impl Ord for PopupLayout

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fn cmp(&self, other: &PopupLayout) -> Ordering

This method returns an Ordering between self and other. Read more
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fn max(self, other: Self) -> Self
where Self: Sized,

Compares and returns the maximum of two values. Read more
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fn min(self, other: Self) -> Self
where Self: Sized,

Compares and returns the minimum of two values. Read more
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fn clamp(self, min: Self, max: Self) -> Self
where Self: Sized + PartialOrd,

Restrict a value to a certain interval. Read more
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impl PartialEq for PopupLayout

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fn eq(&self, other: &Self) -> bool

This method tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl PartialOrd for PopupLayout

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fn partial_cmp(&self, other: &PopupLayout) -> Option<Ordering>

This method returns an ordering between self and other values if one exists. Read more
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fn lt(&self, other: &Rhs) -> bool

This method tests less than (for self and other) and is used by the < operator. Read more
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fn le(&self, other: &Rhs) -> bool

This method tests less than or equal to (for self and other) and is used by the <= operator. Read more
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fn gt(&self, other: &Rhs) -> bool

This method tests greater than (for self and other) and is used by the > operator. Read more
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fn ge(&self, other: &Rhs) -> bool

This method tests greater than or equal to (for self and other) and is used by the >= operator. Read more
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impl StaticType for PopupLayout

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fn static_type() -> Type

Returns the type identifier of Self.
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impl Eq for PopupLayout

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unsafe fn from_glib_none_as_vec(ptr: *mut GList) -> Vec<T>

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unsafe fn from_glib_full_as_vec(ptr: *mut GList) -> Vec<T>

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unsafe fn from_glib_full_as_vec(ptr: *mut GPtrArray) -> Vec<T>

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