Class TCefDisplayRef

Description
Hierarchy
Fields
Methods
Properties

Unit

uCEFDisplay

Declaration

type TCefDisplayRef = class(TCefBaseRefCountedRef, ICefDisplay)

Description

This interface typically, but not always, corresponds to a physical display connected to the system. A fake Display may exist on a headless system, or a Display may correspond to a remote, virtual display. All size and position values are in density independent pixel (DIP) coordinates unless otherwise indicated. Methods must be called on the browser process UI thread unless otherwise indicated.

For details on coordinate systems and usage see https://bitbucket.org/chromiumembedded/cef/wiki/GeneralUsage#markdown- header-coordinate-systems

<see href="https://bitbucket.org/chromiumembedded/cef/src/master/include/capi/views/cef_display_capi.h">CEF source file: /include/capi/views/cef_display_capi.h (cef_display_t))

Hierarchy

Overview

Methods

Protected function GetID: int64;
Protected function GetDeviceScaleFactor: Single;
Protected procedure ConvertPointToPixels(var point: TCefPoint);
Protected procedure ConvertPointFromPixels(var point: TCefPoint);
Protected function GetBounds: TCefRect;
Protected function GetWorkArea: TCefRect;
Protected function GetRotation: Integer;
Public class function UnWrap(data: Pointer): ICefDisplay;
Public class function Primary: ICefDisplay;
Public class function NearestPoint(const point: TCefPoint; input_pixel_coords: boolean): ICefDisplay;
Public class function MatchingBounds(const bounds: TCefRect; input_pixel_coords: boolean): ICefDisplay;
Public class function GetCount: NativeUInt;
Public class function GetAlls(var aDisplayArray : TCefDisplayArray) : boolean;
Public class function ScreenPointToPixels(const aScreenPoint : TPoint) : TPoint;
Public class function ScreenPointFromPixels(const aPixelsPoint : TPoint) : TPoint;
Public class function ScreenRectToPixels(const aScreenRect : TRect) : TRect;
Public class function ScreenRectFromPixels(const aPixelsRect : TRect) : TRect;

Description

Methods

Protected function GetID: int64;

Returns the unique identifier for this Display.

Protected function GetDeviceScaleFactor: Single;

Returns this Display's device pixel scale factor. This specifies how much the UI should be scaled when the actual output has more pixels than standard displays (which is around 100~120dpi). The potential return values differ by platform. Windowed browsers with 1.0 zoom will have a JavaScript `window.devicePixelRatio` value matching the associated Display's get_device_scale_factor() value.

Protected procedure ConvertPointToPixels(var point: TCefPoint);

Convert |point| from DIP coordinates to pixel coordinates using this Display's device scale factor.

Protected procedure ConvertPointFromPixels(var point: TCefPoint);

Convert |point| from pixel coordinates to DIP coordinates using this Display's device scale factor.

Protected function GetBounds: TCefRect;

Returns this Display's bounds in DIP screen coordinates. This is the full size of the display.

Protected function GetWorkArea: TCefRect;

Returns this Display's work area in DIP screen coordinates. This excludes areas of the display that are occupied with window manager toolbars, etc.

Protected function GetRotation: Integer;

Returns this Display's rotation in degrees.

Public class function UnWrap(data: Pointer): ICefDisplay;

Returns a ICefDisplay instance using a PCefDisplay data pointer.

Public class function Primary: ICefDisplay;

Returns the primary Display.

Public class function NearestPoint(const point: TCefPoint; input_pixel_coords: boolean): ICefDisplay;

Returns the Display nearest |point|. Set |input_pixel_coords| to true (1) if |point| is in pixel screen coordinates instead of DIP screen coordinates.

Public class function MatchingBounds(const bounds: TCefRect; input_pixel_coords: boolean): ICefDisplay;

Returns the Display that most closely intersects |bounds|. Set |input_pixel_coords| to true (1) if |bounds| is in pixel screen coordinates instead of DIP screen coordinates.

Public class function GetCount: NativeUInt;

Returns the total number of Displays. Mirrored displays are excluded; this function is intended to return the number of distinct, usable displays.

Public class function GetAlls(var aDisplayArray : TCefDisplayArray) : boolean;

Returns all Displays. Mirrored displays are excluded; this function is intended to return distinct, usable displays.

Public class function ScreenPointToPixels(const aScreenPoint : TPoint) : TPoint;

Convert |point| from DIP screen coordinates to pixel screen coordinates. This function is only used on Windows.

Public class function ScreenPointFromPixels(const aPixelsPoint : TPoint) : TPoint;

Convert |point| from pixel screen coordinates to DIP screen coordinates. This function is only used on Windows.

Public class function ScreenRectToPixels(const aScreenRect : TRect) : TRect;

Convert |rect| from DIP screen coordinates to pixel screen coordinates. This function is only used on Windows.

Public class function ScreenRectFromPixels(const aPixelsRect : TRect) : TRect;

Convert |rect| from pixel screen coordinates to DIP screen coordinates. This function is only used on Windows.

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