Struct druid::WindowHandle

pub struct WindowHandle(_);

A handle to a platform window object.

Implementations

impl WindowHandle

pub fn show(&self)

Make this window visible.

This is part of the initialization process; it should only be called once, when a window is first created.

pub fn close(&self)

Close the window.

pub fn resizable(&self, resizable: bool)

Set whether the window should be resizable

pub fn set_window_state(&mut self, state: WindowState)

Sets the state of the window.

pub fn get_window_state(&self) -> WindowState

Gets the state of the window.

pub fn handle_titlebar(&self, val: bool)

Informs the system that the current location of the mouse should be treated as part of the window's titlebar. This can be used to implement a custom titlebar widget. Note that because this refers to the current location of the mouse, you should probably call this function in response to every relevant WinHandler::mouse_move.

This is currently only implemented on Windows.

pub fn show_titlebar(&self, show_titlebar: bool)

Set whether the window should show titlebar.

pub fn set_position(&self, position: impl Into<Point>)

Sets the position of the window in pixels, relative to the origin of the virtual screen.

pub fn get_position(&self) -> Point

Returns the position of the window in pixels, relative to the origin of the virtual screen.

pub fn set_size(&self, size: impl Into<Size>)

Set the window's size in display points.

The actual window size in pixels will depend on the platform DPI settings.

This should be considered a request to the platform to set the size of the window. The platform might choose a different size depending on its DPI or other platform-dependent configuration. To know the actual size of the window you should handle the WinHandler::size method.

pub fn get_size(&self) -> Size

Gets the window size, in pixels.

pub fn set_level(&self, level: WindowLevel)

Sets the WindowLevel, the z-order in the Window system / compositor

We do not currently have a getter method, mostly because the system's levels aren't a perfect one-to-one map to druid_shell's levels. A getter method may be added in the future.

pub fn bring_to_front_and_focus(&self)

Bring this window to the front of the window stack and give it focus.

pub fn request_anim_frame(&self)

Request that prepare_paint and paint be called next time there's the opportunity to render another frame. This differs from invalidate and invalidate_rect in that it doesn't invalidate any part of the window.

pub fn invalidate(&self)

Request invalidation of the entire window contents.

pub fn invalidate_rect(&self, rect: Rect)

Request invalidation of a region of the window.

pub fn set_title(&self, title: &str)

Set the title for this menu.

pub fn set_menu(&self, menu: Menu)

Set the top-level menu for this window.

pub fn text(&self) -> CoreGraphicsText

Get access to a type that can perform text layout.

pub fn request_timer(&self, deadline: Duration) -> TimerToken

Schedule a timer.

This causes a WinHandler::timer call at the deadline. The return value is a token that can be used to associate the request with the handler call.

Note that this is not a precise timer. On Windows, the typical resolution is around 10ms. Therefore, it's best used for things like blinking a cursor or triggering tooltips, not for anything requiring precision.

pub fn set_cursor(&mut self, cursor: &Cursor)

Set the cursor icon.

pub fn make_cursor(&self, desc: &CursorDesc) -> Option<Cursor>

pub fn open_file(
    &mut self,
    options: FileDialogOptions
) -> Option<FileDialogToken>

Prompt the user to choose a file to open.

This won't block immediately; the file dialog will be shown whenever control returns to druid-shell, and the WinHandler::open_file method will be called when the dialog is closed.

pub fn save_as(&mut self, options: FileDialogOptions) -> Option<FileDialogToken>

Prompt the user to choose a path for saving.

This won't block immediately; the file dialog will be shown whenever control returns to druid-shell, and the WinHandler::save_as method will be called when the dialog is closed.

pub fn show_context_menu(&self, menu: Menu, pos: Point)

Display a pop-up menu at the given position.

pos is in the coordinate space of the window.

pub fn get_idle_handle(&self) -> Option<IdleHandle>

Get a handle that can be used to schedule an idle task.

pub fn get_scale(&self) -> Result<Scale, Error>

Get the DPI scale of the window.

The returned Scale is a copy and thus its information will be stale after the platform DPI changes. This means you should not stash it and rely on it later; it is only guaranteed to be valid for the current pass of the runloop.

Trait Implementations

impl Clone for WindowHandle

pub fn clone(&self) -> WindowHandle

Returns a copy of the value.

pub fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Default for WindowHandle

pub fn default() -> WindowHandle

Returns the "default value" for a type.

impl From<WindowHandle> for WindowHandle

pub fn from(src: WindowHandle) -> WindowHandle

Performs the conversion.