mirror of
https://github.com/salvadordf/CEF4Delphi.git
synced 2024-11-24 08:02:15 +02:00
350 lines
12 KiB
ObjectPascal
350 lines
12 KiB
ObjectPascal
unit uCEFTextfieldDelegate;
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{$IFDEF FPC}
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{$MODE OBJFPC}{$H+}
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{$ENDIF}
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{$I cef.inc}
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{$IFNDEF TARGET_64BITS}{$ALIGN ON}{$ENDIF}
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{$MINENUMSIZE 4}
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interface
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uses
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{$IFDEF DELPHI16_UP}
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System.Classes, System.SysUtils,
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{$ELSE}
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Classes, SysUtils,
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{$ENDIF}
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uCEFBaseRefCounted, uCEFInterfaces, uCEFTypes, uCEFViewDelegate;
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type
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TCefTextfieldDelegateRef = class(TCefViewDelegateRef, ICefTextfieldDelegate)
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protected
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procedure OnKeyEvent(const textfield: ICefTextfield; const event: TCefKeyEvent; var aResult : boolean);
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procedure OnAfterUserAction(const textfield: ICefTextfield);
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public
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/// <summary>
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/// Returns a ICefTextfieldDelegate instance using a PCefTextfieldDelegate data pointer.
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/// </summary>
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class function UnWrap(data: Pointer): ICefTextfieldDelegate;
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end;
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/// <summary>
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/// Implement this interface to handle Textfield events. The functions of this
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/// interface will be called on the browser process UI thread unless otherwise
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/// indicated.
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/// </summary>
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/// <remarks>
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/// <para><see href="https://bitbucket.org/chromiumembedded/cef/src/master/include/capi/views/cef_textfield_delegate_capi.h">CEF source file: /include/capi/views/cef_textfield_delegate_capi.h (cef_textfield_delegate_t)</see></para>
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/// </remarks>
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TCefTextfieldDelegateOwn = class(TCefViewDelegateOwn, ICefTextfieldDelegate)
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protected
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/// <summary>
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/// Called when |textfield| receives a keyboard event. |event| contains
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/// information about the keyboard event. Return true (1) if the keyboard
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/// event was handled or false (0) otherwise for default handling.
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/// </summary>
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procedure OnKeyEvent(const textfield: ICefTextfield; const event: TCefKeyEvent; var aResult : boolean); virtual;
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/// <summary>
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/// Called after performing a user action that may change |textfield|.
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/// </summary>
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procedure OnAfterUserAction(const textfield: ICefTextfield); virtual;
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/// <summary>
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/// Links the methods in the internal CEF record data pointer with the methods in this class.
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/// </summary>
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procedure InitializeCEFMethods; override;
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public
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constructor Create; override;
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end;
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/// <summary>
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/// This class handles all the ICefTextfieldDelegate and ICefViewDelegate methods which call the ICefTextfieldDelegateEvents methods.
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/// ICefTextfieldDelegateEvents will be implemented by the control receiving the ICefTextfieldDelegate events.
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/// </summary>
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TCustomTextfieldDelegate = class(TCefTextfieldDelegateOwn)
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protected
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FEvents : Pointer;
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// ICefViewDelegate
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procedure OnGetPreferredSize(const view: ICefView; var aResult : TCefSize); override;
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procedure OnGetMinimumSize(const view: ICefView; var aResult : TCefSize); override;
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procedure OnGetMaximumSize(const view: ICefView; var aResult : TCefSize); override;
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procedure OnGetHeightForWidth(const view: ICefView; width: Integer; var aResult: Integer); override;
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procedure OnParentViewChanged(const view: ICefView; added: boolean; const parent: ICefView); override;
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procedure OnChildViewChanged(const view: ICefView; added: boolean; const child: ICefView); override;
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procedure OnWindowChanged(const view: ICefView; added: boolean); override;
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procedure OnLayoutChanged(const view: ICefView; new_bounds: TCefRect); override;
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procedure OnFocus(const view: ICefView); override;
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procedure OnBlur(const view: ICefView); override;
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procedure OnThemeChanged(const view: ICefView); override;
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// ICefTextfieldDelegate
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procedure OnKeyEvent(const textfield: ICefTextfield; const event: TCefKeyEvent; var aResult : boolean); override;
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procedure OnAfterUserAction(const textfield: ICefTextfield); override;
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public
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/// <summary>
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/// Creates an instance of this class liked to an interface that's implemented by a control receiving the events.
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/// </summary>
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constructor Create(const events: ICefTextfieldDelegateEvents); reintroduce;
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end;
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implementation
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uses
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uCEFLibFunctions, uCEFMiscFunctions, uCEFTextfield;
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// **************************************************************
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// ***************** TCefTextfieldDelegateRef *******************
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// **************************************************************
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procedure TCefTextfieldDelegateRef.OnKeyEvent(const textfield : ICefTextfield;
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const event : TCefKeyEvent;
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var aResult : boolean);
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begin
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aResult := (PCefTextfieldDelegate(FData)^.on_key_event(PCefTextfieldDelegate(FData),
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CefGetData(textfield),
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@event) <> 0);
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end;
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procedure TCefTextfieldDelegateRef.OnAfterUserAction(const textfield: ICefTextfield);
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begin
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PCefTextfieldDelegate(FData)^.on_after_user_action(PCefTextfieldDelegate(FData),
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CefGetData(textfield));
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end;
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class function TCefTextfieldDelegateRef.UnWrap(data: Pointer): ICefTextfieldDelegate;
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begin
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if (data <> nil) then
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Result := Create(data) as ICefTextfieldDelegate
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else
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Result := nil;
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end;
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// **************************************************************
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// ***************** TCefTextfieldDelegateOwn *******************
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// **************************************************************
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function cef_textfield_delegate_on_key_event(self: PCefTextfieldDelegate; textfield: PCefTextfield; const event: PCefKeyEvent): Integer; stdcall;
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var
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TempObject : TObject;
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TempResult : boolean;
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begin
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TempObject := CefGetObject(self);
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TempResult := False;
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if (TempObject <> nil) and (TempObject is TCefTextfieldDelegateOwn) then
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TCefTextfieldDelegateOwn(TempObject).OnKeyEvent(TCefTextfieldRef.UnWrap(textfield), event^, TempResult);
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Result := ord(TempResult);
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end;
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procedure cef_textfield_delegate_on_accelerator(self: PCefTextfieldDelegate; textfield: PCefTextfield); stdcall;
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var
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TempObject : TObject;
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begin
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TempObject := CefGetObject(self);
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if (TempObject <> nil) and (TempObject is TCefTextfieldDelegateOwn) then
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TCefTextfieldDelegateOwn(TempObject).OnAfterUserAction(TCefTextfieldRef.UnWrap(textfield));
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end;
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constructor TCefTextfieldDelegateOwn.Create;
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begin
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inherited CreateData(SizeOf(TCefTextfieldDelegate));
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InitializeCEFMethods;
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end;
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procedure TCefTextfieldDelegateOwn.InitializeCEFMethods;
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begin
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inherited InitializeCEFMethods;
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with PCefTextfieldDelegate(FData)^ do
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begin
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on_after_user_action := {$IFDEF FPC}@{$ENDIF}cef_textfield_delegate_on_accelerator;
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on_key_event := {$IFDEF FPC}@{$ENDIF}cef_textfield_delegate_on_key_event;
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end;
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end;
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procedure TCefTextfieldDelegateOwn.OnKeyEvent(const textfield: ICefTextfield; const event: TCefKeyEvent; var aResult : boolean);
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begin
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//
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end;
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procedure TCefTextfieldDelegateOwn.OnAfterUserAction(const textfield: ICefTextfield);
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begin
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//
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end;
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// **************************************************************
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// ***************** TCustomTextfieldDelegate *******************
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// **************************************************************
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constructor TCustomTextfieldDelegate.Create(const events: ICefTextfieldDelegateEvents);
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begin
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inherited Create;
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FEvents := Pointer(events);
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end;
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procedure TCustomTextfieldDelegate.OnGetPreferredSize(const view: ICefView; var aResult : TCefSize);
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begin
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inherited OnGetPreferredSize(view, aResult);
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try
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if (FEvents <> nil) then
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ICefTextfieldDelegateEvents(FEvents).doOnGetPreferredSize(view, aResult);
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except
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on e : exception do
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if CustomExceptionHandler('TCustomTextfieldDelegate.OnGetPreferredSize', e) then raise;
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end;
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end;
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procedure TCustomTextfieldDelegate.OnGetMinimumSize(const view: ICefView; var aResult : TCefSize);
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begin
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inherited OnGetMinimumSize(view, aResult);
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try
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if (FEvents <> nil) then
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ICefTextfieldDelegateEvents(FEvents).doOnGetMinimumSize(view, aResult);
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except
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on e : exception do
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if CustomExceptionHandler('TCustomTextfieldDelegate.OnGetMinimumSize', e) then raise;
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end;
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end;
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procedure TCustomTextfieldDelegate.OnGetMaximumSize(const view: ICefView; var aResult : TCefSize);
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begin
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inherited OnGetMaximumSize(view, aResult);
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try
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if (FEvents <> nil) then
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ICefTextfieldDelegateEvents(FEvents).doOnGetMaximumSize(view, aResult);
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except
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on e : exception do
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if CustomExceptionHandler('TCustomTextfieldDelegate.OnGetMaximumSize', e) then raise;
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end;
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end;
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procedure TCustomTextfieldDelegate.OnGetHeightForWidth(const view: ICefView; width: Integer; var aResult: Integer);
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begin
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inherited OnGetHeightForWidth(view, width, aResult);
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try
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if (FEvents <> nil) then
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ICefTextfieldDelegateEvents(FEvents).doOnGetHeightForWidth(view, width, aResult);
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except
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on e : exception do
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if CustomExceptionHandler('TCustomTextfieldDelegate.OnGetHeightForWidth', e) then raise;
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end;
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end;
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procedure TCustomTextfieldDelegate.OnParentViewChanged(const view: ICefView; added: boolean; const parent: ICefView);
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begin
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try
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if (FEvents <> nil) then
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ICefTextfieldDelegateEvents(FEvents).doOnParentViewChanged(view, added, parent);
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except
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on e : exception do
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if CustomExceptionHandler('TCustomTextfieldDelegate.OnParentViewChanged', e) then raise;
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end;
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end;
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procedure TCustomTextfieldDelegate.OnChildViewChanged(const view: ICefView; added: boolean; const child: ICefView);
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begin
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try
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if (FEvents <> nil) then
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ICefTextfieldDelegateEvents(FEvents).doOnChildViewChanged(view, added, child);
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except
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on e : exception do
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if CustomExceptionHandler('TCustomTextfieldDelegate.OnChildViewChanged', e) then raise;
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end;
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end;
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procedure TCustomTextfieldDelegate.OnWindowChanged(const view: ICefView; added: boolean);
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begin
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try
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if (FEvents <> nil) then
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ICefTextfieldDelegateEvents(FEvents).doOnWindowChanged(view, added);
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except
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on e : exception do
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if CustomExceptionHandler('TCustomTextfieldDelegate.OnWindowChanged', e) then raise;
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end;
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end;
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procedure TCustomTextfieldDelegate.OnLayoutChanged(const view: ICefView; new_bounds: TCefRect);
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begin
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try
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if (FEvents <> nil) then
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ICefTextfieldDelegateEvents(FEvents).doOnLayoutChanged(view, new_bounds);
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except
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on e : exception do
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if CustomExceptionHandler('TCustomTextfieldDelegate.OnLayoutChanged', e) then raise;
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end;
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end;
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procedure TCustomTextfieldDelegate.OnFocus(const view: ICefView);
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begin
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try
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if (FEvents <> nil) then
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ICefTextfieldDelegateEvents(FEvents).doOnFocus(view);
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except
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on e : exception do
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if CustomExceptionHandler('TCustomTextfieldDelegate.OnFocus', e) then raise;
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end;
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end;
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procedure TCustomTextfieldDelegate.OnBlur(const view: ICefView);
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begin
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try
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if (FEvents <> nil) then
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ICefTextfieldDelegateEvents(FEvents).doOnBlur(view);
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except
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on e : exception do
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if CustomExceptionHandler('TCustomTextfieldDelegate.OnBlur', e) then raise;
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end;
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end;
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procedure TCustomTextfieldDelegate.OnThemeChanged(const view: ICefView);
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begin
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try
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if (FEvents <> nil) then
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ICefTextfieldDelegateEvents(FEvents).doOnThemeChanged(view);
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except
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on e : exception do
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if CustomExceptionHandler('TCustomTextfieldDelegate.OnThemeChanged', e) then raise;
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end;
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end;
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procedure TCustomTextfieldDelegate.OnKeyEvent(const textfield: ICefTextfield; const event: TCefKeyEvent; var aResult : boolean);
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begin
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try
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if (FEvents <> nil) then
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ICefTextfieldDelegateEvents(FEvents).doOnKeyEvent(textfield, event, aResult);
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except
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on e : exception do
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if CustomExceptionHandler('TCustomTextfieldDelegate.OnKeyEvent', e) then raise;
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end;
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end;
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procedure TCustomTextfieldDelegate.OnAfterUserAction(const textfield: ICefTextfield);
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begin
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try
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if (FEvents <> nil) then
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ICefTextfieldDelegateEvents(FEvents).doOnAfterUserAction(textfield);
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except
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on e : exception do
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if CustomExceptionHandler('TCustomTextfieldDelegate.OnAfterUserAction', e) then raise;
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end;
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end;
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end.
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