# Class TCefViewRef

Description
Hierarchy
Methods

## Unit

uCEFView

## Declaration

`type TCefViewRef = class(TCefBaseRefCountedRef, ICefView)`

## Description

A View is a rectangle within the views View hierarchy. It is the base interface for all Views. All size and position values are in density independent pixels (DIP) unless otherwise indicated. Methods must be called on the browser process UI thread unless otherwise indicated.

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

## Hierarchy

- TInterfacedObject
- TCefBaseRefCountedRef
- TCefViewRef

## Overview

### Methods

Protected | `function AsBrowserView: ICefBrowserView;`
Protected | `function AsButton: ICefButton;`
Protected | `function AsPanel: ICefPanel;`
Protected | `function AsScrollView: ICefScrollView;`
Protected | `function AsTextfield: ICefTextfield;`
Protected | `function GetTypeString: ustring;`
Protected | `function ToStringEx(include_children: boolean): ustring;`
Protected | `function IsValid: boolean;`
Protected | `function IsAttached: boolean;`
Protected | `function IsSame(const that: ICefView): boolean;`
Protected | `function GetDelegate: ICefViewDelegate;`
Protected | `function GetWindow: ICefWindow;`
Protected | `function GetID: Integer;`
Protected | `procedure SetID(id_: Integer);`
Protected | `function GetGroupID: Integer;`
Protected | `procedure SetGroupID(group_id: Integer);`
Protected | `function GetParentView: ICefView;`
Protected | `function GetViewForID(id_: Integer): ICefView;`
Protected | `procedure SetBounds(const bounds_: TCefRect);`
Protected | `function GetBounds: TCefRect;`
Protected | `function GetBoundsInScreen: TCefRect;`
Protected | `procedure SetSize(const size_: TCefSize);`
Protected | `function GetSize: TCefSize;`
Protected | `procedure SetPosition(const position_: TCefPoint);`
Protected | `function GetPosition: TCefPoint;`
Protected | `procedure SetInsets(const insets: TCefInsets);`
Protected | `function GetInsets: TCefInsets;`
Protected | `function GetPreferredSize: TCefSize;`
Protected | `procedure SizeToPreferredSize;`
Protected | `function GetMinimumSize: TCefSize;`
Protected | `function GetMaximumSize: TCefSize;`
Protected | `function GetHeightForWidth(width: Integer): Integer;`
Protected | `procedure InvalidateLayout;`
Protected | `procedure SetVisible(visible_: boolean);`
Protected | `function IsVisible: boolean;`
Protected | `function IsDrawn: boolean;`
Protected | `procedure SetEnabled(enabled_: boolean);`
Protected | `function IsEnabled: boolean;`
Protected | `procedure SetFocusable(focusable_: boolean);`
Protected | `function IsFocusable: boolean;`
Protected | `function IsAccessibilityFocusable: boolean;`
Protected | `function HasFocus: boolean;`
Protected | `procedure RequestFocus;`
Protected | `procedure SetBackgroundColor(color: TCefColor);`
Protected | `function GetBackgroundColor: TCefColor;`
Protected | `function GetThemeColor(color_id: integer): TCefColor;`
Protected | `function ConvertPointToScreen(var point: TCefPoint): boolean;`
Protected | `function ConvertPointFromScreen(var point: TCefPoint): boolean;`
Protected | `function ConvertPointToWindow(var point: TCefPoint): boolean;`
Protected | `function ConvertPointFromWindow(var point: TCefPoint): boolean;`
Protected | `function ConvertPointToView(const view : ICefView; var point: TCefPoint): boolean;`
Protected | `function ConvertPointFromView(const view : ICefView; var point: TCefPoint): boolean;`
Public | `class function UnWrap(data: Pointer): ICefView;`

## Description

### Methods

Protected | `function AsBrowserView: ICefBrowserView;`
Returns this View as a BrowserView or NULL if this is not a BrowserView.

Protected | `function AsButton: ICefButton;`
Returns this View as a Button or NULL if this is not a Button.

Protected | `function AsPanel: ICefPanel;`
Returns this View as a Panel or NULL if this is not a Panel.

Protected | `function AsScrollView: ICefScrollView;`
Returns this View as a ScrollView or NULL if this is not a ScrollView.

Protected | `function AsTextfield: ICefTextfield;`
Returns this View as a Textfield or NULL if this is not a Textfield.

Protected | `function GetTypeString: ustring;`
Returns the type of this View as a string. Used primarily for testing purposes.

Protected | `function ToStringEx(include_children: boolean): ustring;`
Returns a string representation of this View which includes the type and various type-specific identifying attributes. If |include_children| is true (1) any child Views will also be included. Used primarily for testing purposes.

Protected | `function IsValid: boolean;`
Returns true (1) if this View is valid.

Protected | `function IsAttached: boolean;`
Returns true (1) if this View is currently attached to another View. A View can only be attached to one View at a time.

Protected | `function IsSame(const that: ICefView): boolean;`
Returns true (1) if this View is the same as |that| View.

Protected | `function GetDelegate: ICefViewDelegate;`
Returns the delegate associated with this View, if any.

Protected | `function GetWindow: ICefWindow;`
Returns the top-level Window hosting this View, if any.

Protected | `function GetID: Integer;`
Returns the ID for this View.

Protected | `procedure SetID(id_: Integer);`
Sets the ID for this View. ID should be unique within the subtree that you intend to search for it. 0 is the default ID for views.

Protected | `function GetGroupID: Integer;`
Returns the group id of this View, or -1 if not set.

Protected | `procedure SetGroupID(group_id: Integer);`
A group id is used to tag Views which are part of the same logical group. Focus can be moved between views with the same group using the arrow keys. The group id is immutable once it's set.

Protected | `function GetParentView: ICefView;`
Returns the View that contains this View, if any.

Protected | `function GetViewForID(id_: Integer): ICefView;`
Recursively descends the view tree starting at this View, and returns the first child that it encounters with the given ID. Returns NULL if no matching child view is found.

Protected | `procedure SetBounds(const bounds_: TCefRect);`
Sets the bounds (size and position) of this View. |bounds| is in parent coordinates, or DIP screen coordinates if there is no parent.

Protected | `function GetBounds: TCefRect;`
Returns the bounds (size and position) of this View in parent coordinates, or DIP screen coordinates if there is no parent.

Protected | `function GetBoundsInScreen: TCefRect;`
Returns the bounds (size and position) of this View in DIP screen coordinates.

Protected | `procedure SetSize(const size_: TCefSize);`
Sets the size of this View without changing the position. |size| in parent coordinates, or DIP screen coordinates if there is no parent.

Protected | `function GetSize: TCefSize;`
Returns the size of this View in parent coordinates, or DIP screen coordinates if there is no parent.

Protected | `procedure SetPosition(const position_: TCefPoint);`
Sets the position of this View without changing the size. |position| is in parent coordinates, or DIP screen coordinates if there is no parent.

Protected | `function GetPosition: TCefPoint;`
Returns the position of this View. Position is in parent coordinates, or DIP screen coordinates if there is no parent.

Protected | `procedure SetInsets(const insets: TCefInsets);`
Sets the insets for this View. |insets| is in parent coordinates, or DIP screen coordinates if there is no parent.

Protected | `function GetInsets: TCefInsets;`
Returns the insets for this View in parent coordinates, or DIP screen coordinates if there is no parent.

Protected | `function GetPreferredSize: TCefSize;`
Returns the size this View would like to be if enough space is available. Size is in parent coordinates, or DIP screen coordinates if there is no parent.

Protected | `procedure SizeToPreferredSize;`
Size this View to its preferred size. Size is in parent coordinates, or DIP screen coordinates if there is no parent.

Protected | `function GetMinimumSize: TCefSize;`
Returns the minimum size for this View. Size is in parent coordinates, or DIP screen coordinates if there is no parent.

Protected | `function GetMaximumSize: TCefSize;`
Returns the maximum size for this View. Size is in parent coordinates, or DIP screen coordinates if there is no parent.

Protected | `function GetHeightForWidth(width: Integer): Integer;`
Returns the height necessary to display this View with the provided width.

Protected | `procedure InvalidateLayout;`
Indicate that this View and all parent Views require a re-layout. This ensures the next call to layout() will propagate to this View even if the bounds of parent Views do not change.

Protected | `procedure SetVisible(visible_: boolean);`
Sets whether this View is visible. Windows are hidden by default and other views are visible by default. This View and any parent views must be set as visible for this View to be drawn in a Window. If this View is set as hidden then it and any child views will not be drawn and, if any of those views currently have focus, then focus will also be cleared. Painting is scheduled as needed. If this View is a Window then calling this function is equivalent to calling the Window show() and hide() functions.

Protected | `function IsVisible: boolean;`
Returns whether this View is visible. A view may be visible but still not drawn in a Window if any parent views are hidden. If this View is a Window then a return value of true (1) indicates that this Window is currently visible to the user on-screen. If this View is not a Window then call is_drawn() to determine whether this View and all parent views are visible and will be drawn.

Protected | `function IsDrawn: boolean;`
Returns whether this View is visible and drawn in a Window. A view is drawn if it and all parent views are visible. If this View is a Window then calling this function is equivalent to calling is_visible(). Otherwise, to determine if the containing Window is visible to the user on-screen call is_visible() on the Window.

Protected | `procedure SetEnabled(enabled_: boolean);`
Set whether this View is enabled. A disabled View does not receive keyboard or mouse inputs. If |enabled| differs from the current value the View will be repainted. Also, clears focus if the focused View is disabled.

Protected | `function IsEnabled: boolean;`
Returns whether this View is enabled.

Protected | `procedure SetFocusable(focusable_: boolean);`
Sets whether this View is capable of taking focus. It will clear focus if the focused View is set to be non-focusable. This is false (0) by default so that a View used as a container does not get the focus.

Protected | `function IsFocusable: boolean;`
Returns true (1) if this View is focusable, enabled and drawn.

Protected | `function IsAccessibilityFocusable: boolean;`
Return whether this View is focusable when the user requires full keyboard access, even though it may not be normally focusable.

Protected | `function HasFocus: boolean;`
Returns true (1) if this View has focus in the context of the containing Window. Check both this function and ICefWindow.IsActive to determine global keyboard focus.

Protected | `procedure RequestFocus;`
Request focus for this View in the context of the containing Window. If this View is focusable it will become the focused View. Any focus changes while a Window is not active may be applied after that Window next becomes active.

Protected | `procedure SetBackgroundColor(color: TCefColor);`
Sets the background color for this View. The background color will be automatically reset when ICefViewDelegate.OnThemeChanged is called.

Protected | `function GetBackgroundColor: TCefColor;`
Returns the background color for this View. If the background color is unset then the current `GetThemeColor(CEF_ColorPrimaryBackground)` value will be returned. If this View belongs to an overlay (created with ICefWindow.AddOverlayView), and the background color is unset, then a value of transparent (0) will be returned.

Protected | `function GetThemeColor(color_id: integer): TCefColor;`
Returns the current theme color associated with |color_id|, or the placeholder color (red) if unset. See cef_color_ids.h for standard ID values. Standard colors can be overridden and custom colors can be added using ICefWindow.SetThemeColor.

Protected | `function ConvertPointToScreen(var point: TCefPoint): boolean;`
Convert |point| from this View's coordinate system to DIP screen coordinates. This View must belong to a Window when calling this function. Returns true (1) if the conversion is successful or false (0) otherwise. Use ICefDisplay.ConvertPointToPixels() after calling this function if further conversion to display-specific pixel coordinates is desired.

Protected | `function ConvertPointFromScreen(var point: TCefPoint): boolean;`
Convert |point| to this View's coordinate system from DIP screen coordinates. This View must belong to a Window when calling this function. Returns true (1) if the conversion is successful or false (0) otherwise. Use ICefDisplay.ConvertPointFromPixels() before calling this function if conversion from display-specific pixel coordinates is necessary.

Protected | `function ConvertPointToWindow(var point: TCefPoint): boolean;`
Convert |point| from this View's coordinate system to that of the Window. This View must belong to a Window when calling this function. Returns true (1) if the conversion is successful or false (0) otherwise.

Protected | `function ConvertPointFromWindow(var point: TCefPoint): boolean;`
Convert |point| to this View's coordinate system from that of the Window. This View must belong to a Window when calling this function. Returns true (1) if the conversion is successful or false (0) otherwise.

Protected | `function ConvertPointToView(const view : ICefView; var point: TCefPoint): boolean;`
Convert |point| from this View's coordinate system to that of |view|. |view| needs to be in the same Window but not necessarily the same view hierarchy. Returns true (1) if the conversion is successful or false (0) otherwise.

Protected | `function ConvertPointFromView(const view : ICefView; var point: TCefPoint): boolean;`
Convert |point| to this View's coordinate system from that |view|. |view| needs to be in the same Window but not necessarily the same view hierarchy. Returns true (1) if the conversion is successful or false (0) otherwise.

Public | `class function UnWrap(data: Pointer): ICefView;`
Returns a ICefView instance using a PCefView data pointer.

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