# Class TCustomButtonDelegate

Description
Hierarchy
Fields
Methods

## Unit

uCEFButtonDelegate

## Declaration

`type TCustomButtonDelegate = class(TCefButtonDelegateOwn)`

## Description

This class handles all the ICefButtonDelegate methods which call the ICefButtonDelegateEvents methods. ICefButtonDelegateEvents will be implemented by the control receiving the ICefButtonDelegate events.

## Hierarchy

- TInterfacedObject
- TCefBaseRefCountedOwn
- TCefViewDelegateOwn
- TCefButtonDelegateOwn
- TCustomButtonDelegate

## Overview

### Fields

Protected | `FEvents: Pointer;`

### Methods

Protected | `procedure OnGetPreferredSize(const view: ICefView; var aResult : TCefSize); override;`
Protected | `procedure OnGetMinimumSize(const view: ICefView; var aResult : TCefSize); override;`
Protected | `procedure OnGetMaximumSize(const view: ICefView; var aResult : TCefSize); override;`
Protected | `procedure OnGetHeightForWidth(const view: ICefView; width: Integer; var aResult: Integer); override;`
Protected | `procedure OnParentViewChanged(const view: ICefView; added: boolean; const parent: ICefView); override;`
Protected | `procedure OnChildViewChanged(const view: ICefView; added: boolean; const child: ICefView); override;`
Protected | `procedure OnWindowChanged(const view: ICefView; added: boolean); override;`
Protected | `procedure OnLayoutChanged(const view: ICefView; new_bounds: TCefRect); override;`
Protected | `procedure OnFocus(const view: ICefView); override;`
Protected | `procedure OnBlur(const view: ICefView); override;`
Protected | `procedure OnThemeChanged(const view: ICefView); override;`
Protected | `procedure OnButtonPressed(const button: ICefButton); override;`
Protected | `procedure OnButtonStateChanged(const button: ICefButton); override;`
Public | `constructor Create(const events: ICefButtonDelegateEvents); reintroduce;`

## Description

### Fields

Protected | `FEvents: Pointer;`
This item has no description.

### Methods

Protected | `procedure OnGetPreferredSize(const view: ICefView; var aResult : TCefSize); override;`
ICefViewDelegate

Protected | `procedure OnGetMinimumSize(const view: ICefView; var aResult : TCefSize); override;`
This item has no description. Showing description inherited from TCefViewDelegateOwn.OnGetMinimumSize. Return the minimum size for |view|.

Protected | `procedure OnGetMaximumSize(const view: ICefView; var aResult : TCefSize); override;`
This item has no description. Showing description inherited from TCefViewDelegateOwn.OnGetMaximumSize. Return the maximum size for |view|.

Protected | `procedure OnGetHeightForWidth(const view: ICefView; width: Integer; var aResult: Integer); override;`
This item has no description. Showing description inherited from TCefViewDelegateOwn.OnGetHeightForWidth. Return the height necessary to display |view| with the provided |width|. If not specified the result of get_preferred_size().height will be used by default. Override if |view|'s preferred height depends upon the width (for example, with Labels).

Protected | `procedure OnParentViewChanged(const view: ICefView; added: boolean; const parent: ICefView); override;`
This item has no description. Showing description inherited from TCefViewDelegateOwn.OnParentViewChanged. Called when the parent of |view| has changed. If |view| is being added to |parent| then |added| will be true (1). If |view| is being removed from |parent| then |added| will be false (0). If |view| is being reparented the remove notification will be sent before the add notification. Do not modify the view hierarchy in this callback.

Protected | `procedure OnChildViewChanged(const view: ICefView; added: boolean; const child: ICefView); override;`
This item has no description. Showing description inherited from TCefViewDelegateOwn.OnChildViewChanged. Called when a child of |view| has changed. If |child| is being added to |view| then |added| will be true (1). If |child| is being removed from |view| then |added| will be false (0). If |child| is being reparented the remove notification will be sent to the old parent before the add notification is sent to the new parent. Do not modify the view hierarchy in this callback.

Protected | `procedure OnWindowChanged(const view: ICefView; added: boolean); override;`
This item has no description. Showing description inherited from TCefViewDelegateOwn.OnWindowChanged. Called when |view| is added or removed from the ICefWindow.

Protected | `procedure OnLayoutChanged(const view: ICefView; new_bounds: TCefRect); override;`
This item has no description. Showing description inherited from TCefViewDelegateOwn.OnLayoutChanged. Called when the layout of |view| has changed.

Protected | `procedure OnFocus(const view: ICefView); override;`
This item has no description. Showing description inherited from TCefViewDelegateOwn.OnFocus. Called when |view| gains focus.

Protected | `procedure OnBlur(const view: ICefView); override;`
This item has no description. Showing description inherited from TCefViewDelegateOwn.OnBlur. Called when |view| loses focus.

Protected | `procedure OnThemeChanged(const view: ICefView); override;`
This item has no description. Showing description inherited from TCefViewDelegateOwn.OnThemeChanged. ( Called when the theme for |view| has changed, after the new theme colors have already been applied. Views are notified via the component hierarchy in depth-first reverse order (children before parents). This will be called in the following cases:
    1. When |view|, or a parent of |view|, is added to a Window.
    2. When the native/OS or Chrome theme changes for the Window that contains
       |view|. See ICefWindowDelegate.OnThemeColorsChanged documentation.
    3. When the client explicitly calls ICefWindow.ThemeChanged on the
       Window that contains |view|.
Optionally use this callback to override the new per-View theme colors by calling ICefView.SetBackgroundColor or the appropriate component- specific function. See ICefWindow.SetThemeColor documentation for how to customize additional Window theme colors. (

Protected | `procedure OnButtonPressed(const button: ICefButton); override;`
ICefButtonDelegate

Protected | `procedure OnButtonStateChanged(const button: ICefButton); override;`
This item has no description. Showing description inherited from TCefButtonDelegateOwn.OnButtonStateChanged. Called when the state of |button| changes.

Public | `constructor Create(const events: ICefButtonDelegateEvents); reintroduce;`
Creates an instance of this class liked to an interface that's implemented by a control receiving the events.

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