unit qdac_fmx_vkhelper;
interface
uses classes, sysutils, math, FMX.controls, FMX.Layouts,
System.Types;
type
TControlHelper = class helper for TControl
function OffsetOf(AParent: TControl): TPointF;
function LocalToParent(AParent: TControl; APoint: TPointF)
: TPointF; overload;
function LocalToParent(AParent: TControl; R: TRectF): TRectF; overload;
end;
TScrollBoxHelper = class helper for TCustomScrollBox
public
procedure ScrollInView(ACtrl: TControl);
end;
var
EnableReturnKeyHook: Boolean;
function IsVKVisible: Boolean;
function GetVKBounds: TRectF; overload;
implementation
uses System.UITypes, System.Messaging,
FMX.Types, System.Rtti,
FMX.text, FMX.scrollbox, FMX.VirtualKeyboard, FMX.Forms,
FMX.Platform, typinfo
{$IFDEF ANDROID}, FMX.Platform.Android, FMX.Helpers.Android,
FMX.VirtualKeyboard.Android, Androidapi.JNI.GraphicsContentViewText,
Androidapi.JNI.Embarcadero {$ENDIF}
{$IFDEF IOS}
, Macapi.Helpers, FMX.Platform.iOS, FMX.VirtualKeyboard.iOS,
iOSapi.Foundation, iOSapi.UIKit
{$ENDIF}
;
type
PAdjustItem = ^TAdjustItem;
TAdjustItem = record
Prior: PAdjustItem;
Control: TControl;
LastMargin: TPointF;
LastViewPos: TPointF;
LastBounds: TRectF;
LastAlign: TAlignLayout;
end;
TQAdjustStack = class
private
function GetLastCtrl: TControl;
protected
FLast: PAdjustItem;
function GetAdjusted: Boolean;
procedure RemoveLast;
public
procedure Save(ACtrl: TControl);
procedure Restore;
procedure Remove(ACtrl: TComponent);
property Adjusted: Boolean read GetAdjusted;
property LastControl: TControl read GetLastCtrl;
end;
TVKNextHelper = class(TFMXObject)
protected
FOriginEvent: TKeyEvent;
procedure SetParent(const Value: TFMXObject); override;
procedure DoFocusNext(Sender: TObject; var Key: Word; var KeyChar: Char;
Shift: TShiftState);
end;
TVKStateHandler = class(TComponent)
protected
FVKMsgId: Integer; FSizeMsgId: Integer; FIdleMsgId: Integer;
FLastControl: TControl;
FAdjustStack: TQAdjustStack; {$IFDEF ANDROID}
FVKState: PByte;
{$ENDIF}
procedure DoVKVisibleChanged(const Sender: TObject;
const Msg: System.Messaging.TMessage);
procedure DoSizeChanged(const Sender: TObject;
const Msg: System.Messaging.TMessage);
procedure DoAppIdle(const Sender: TObject;
const Msg: System.Messaging.TMessage);
procedure Notification(AComponent: TComponent;
Operation: TOperation); override;
function AdjustByLayout(ARoot: TFMXObject; AVOffset: Single): Single;
function AdjustByScrollBox(AScrollBox: TCustomScrollBox;
AVOffset: Single): Single;
function AdjustByPresentedScrollBox(AScrollBox: TCustomPresentedScrollBox;
AVOffset: Single): Single;
procedure AdjustCtrl(ACtrl: TControl; AVKBounds, ACtrlBounds: TRectF;
AVKVisible: Boolean);
function NeedAdjust(ACtrl: TControl; var ACaretRect: TRectF): Boolean;
function IsAnimating(AScrollBox: TCustomScrollBox): Boolean;
procedure AdjustIfNeeded;
public
constructor Create(AOwner: TComponent); overload; override;
destructor Destroy; override;
end;
var
VKHandler: TVKStateHandler;
{$IFDEF ANDROID}
function GetVKBounds(var ARect: TRect): Boolean; overload;
var
ContentRect, TotalRect: JRect;
begin
ContentRect := TJRect.Create;
TotalRect := TJRect.Create;
MainActivity.getWindow.getDecorView.getWindowVisibleDisplayFrame(ContentRect);
MainActivity.getWindow.getDecorView.getDrawingRect(TotalRect);
Result := TotalRect.Bottom <> ContentRect.Bottom;
if Result then
begin
ARect.Left := TotalRect.Left;
ARect.Top := ContentRect.Bottom;
ARect.Right := TotalRect.Right;
ARect.Bottom := TotalRect.Bottom;
end;
end;
function GetVKBounds: TRectF; overload;
var
ContentRect, TotalRect: JRect;
begin
ContentRect := TJRect.Create;
TotalRect := TJRect.Create;
MainActivity.getWindow.getDecorView.getWindowVisibleDisplayFrame(ContentRect);
MainActivity.getWindow.getDecorView.getDrawingRect(TotalRect);
Result := TRectF.Create(ConvertPixelToPoint(TPointF.Create(TotalRect.Left,
TotalRect.Top + ContentRect.height)),
ConvertPixelToPoint(TPointF.Create(TotalRect.Right, TotalRect.Bottom)));
end;
{$ELSE}
{$IFDEF IOS}
_IOS_VKBounds: TRectF;
function GetVKBounds: TRectF; overload;
var
ATop: Integer;
begin
Result := _IOS_VKBounds;
ATop := Screen.WorkAreaTop;
Result.Top := Result.Top - ATop;
Result.Bottom := Result.Bottom - ATop;
end;
function GetVKBounds(var ARect: TRect): Boolean; overload;
var
ATemp: TRectF;
AService: IFMXScreenService;
AScale: Single;
begin
ATemp := GetVKBounds;
Result := not ATemp.IsEmpty;
if Result then
begin
if TPlatformServices.Current.SupportsPlatformService(IFMXScreenService,
AService) then
begin
AScale := AService.GetScreenScale;
ARect.Left := Trunc(ATemp.Left * AScale);
ARect.Top := Trunc(ATemp.Top * AScale);
ARect.Right := Trunc(ATemp.Right * AScale);
ARect.Bottom := Trunc(ATemp.Bottom * AScale);
end;
end;
end;
{$ELSE}
function GetVKBounds: TRectF; overload;
begin
Result := TRectF.Empty;
end;
function GetVKBounds(var ARect: TRect): Boolean; overload;
begin
Result := false;
end;
{$ENDIF}
{$ENDIF}
function IsVKVisible: Boolean;
var
R: TRect;
begin
{$IFDEF NEXTGEN}
Result := GetVKBounds(R);
{$ELSE}
Result := false;
{$ENDIF}
end;
function TControlHelper.LocalToParent(AParent: TControl;
APoint: TPointF): TPointF;
var
AOffset: TPointF;
begin
AOffset := OffsetOf(AParent);
Result.X := APoint.X + AOffset.X;
Result.Y := APoint.Y + AOffset.Y;
end;
function TControlHelper.LocalToParent(AParent: TControl; R: TRectF): TRectF;
var
AOffset: TPointF;
begin
AOffset := OffsetOf(AParent);
Result := R;
Result.Offset(AOffset.X, AOffset.Y);
end;
function TControlHelper.OffsetOf(AParent: TControl): TPointF;
var
ACtrl: TControl;
begin
ACtrl := Self;
Result.X := 0;
Result.Y := 0;
while (ACtrl <> nil) and (ACtrl <> AParent) do
begin
Result.X := Result.X + ACtrl.Position.X;
Result.Y := Result.Y + ACtrl.Position.Y;
ACtrl := ACtrl.ParentControl;
end;
if not Assigned(ACtrl) then
raise Exception.CreateFmt('ض¸¶¨µؤ؟ط¼ %s ²»تا %s µؤ×س؟ط¼', [Name, AParent.Name]);
end;
procedure TScrollBoxHelper.ScrollInView(ACtrl: TControl);
var
R, LR: TRectF;
dx, dy: Single;
begin
R := ACtrl.LocalToParent(Self, ACtrl.LocalRect);
LR := LocalRect;
if not LR.Contains(R) then
begin
if R.Left > LR.Right then
dx := LR.Right - R.Right
else if R.Right < R.Left then
dx := R.Left
else
dx := 0;
if R.Top > LR.Bottom then
dy := LR.Bottom - R.Bottom
else if R.Bottom < LR.Top then
dy := R.Top
else
dy := 0;
ScrollBy(dx, dy);
end;
end;
function TVKStateHandler.AdjustByLayout(ARoot: TFMXObject;
AVOffset: Single): Single;
var
ALayout: TControl;
procedure BeginUpdate(AObj: TFMXObject);
begin
if AObj is TControl then
(AObj as TControl).BeginUpdate
else if AObj is TCustomForm then
(AObj as TCustomForm).BeginUpdate;
end;
procedure EndUpdate(AObj: TFMXObject);
begin
if AObj is TControl then
(AObj as TControl).EndUpdate
else if AObj is TCustomForm then
(AObj as TCustomForm).EndUpdate;
end;
procedure MoveCtrls(AOldParent, ANewParent: TFMXObject);
var
I: Integer;
AChild: TFMXObject;
begin
I := 0;
BeginUpdate(AOldParent);
BeginUpdate(ANewParent);
try
while I < AOldParent.ChildrenCount do
begin
AChild := AOldParent.Children[i];
if AChild <> ANewParent then
begin
if AChild.Parent = AOldParent then
begin
AChild.Parent := ANewParent;
Continue;
end;
end;
Inc(I);
end;
finally
EndUpdate(AOldParent);
EndUpdate(ANewParent);
end;
end;
function RootLayout(ARoot: TFMXObject): TControl;
var
ACtrl: TFMXObject;
I: Integer;
ALastRootStyle: String;
begin
Result := nil;
if (ARoot.ComponentCount > 0) then
begin
for I := 0 to ARoot.ComponentCount - 1 do
begin
if ACtrl is TLayout then
begin
Result := ACtrl as TLayout;
if Result.TagObject <> Self then
Result := nil;
end;
end;
end;
if Result = nil then
begin
if ARoot is TCustomForm then
begin
with ARoot as TCustomForm do
begin
ALastRootStyle := StyleLookup;
StyleLookup := '';
end;
end
else
ALastRootStyle := '';
Result := TLayout.Create(ARoot);
Result.Parent := ARoot;
Result.TagObject := Self;
with ARoot as IContainerObject do
Result.SetBounds(0, 0, ContainerWidth, ContainerHeight);
MoveCtrls(ARoot, Result);
if Length(ALastRootStyle) > 0 then
(ARoot as TCustomForm).StyleLookup := ALastRootStyle;
end;
end;
begin
ALayout := RootLayout(ARoot); FAdjustStack.Save(ALayout);
ALayout.Position.Y := ALayout.Position.Y + AVOffset;
Result := AVOffset;
end;
function TVKStateHandler.AdjustByPresentedScrollBox
(AScrollBox: TCustomPresentedScrollBox; AVOffset: Single): Single;
var
ALastY: Single;
begin
FAdjustStack.Save(AScrollBox);
ALastY := AScrollBox.ViewportPosition.Y;
AScrollBox.ViewportPosition.Offset(0,AVOffset+ALastY);
Result := ALastY - AScrollBox.ViewportPosition.Y;
end;
function TVKStateHandler.AdjustByScrollBox(AScrollBox: TCustomScrollBox;
AVOffset: Single): Single;
var
ALastY: Single;
begin
FAdjustStack.Save(AScrollBox);
ALastY := AScrollBox.ViewportPosition.Y;
AScrollBox.ScrollBy(0, AVOffset);
Result := ALastY - AScrollBox.ViewportPosition.Y;
end;
procedure TVKStateHandler.AdjustCtrl(ACtrl: TControl;
AVKBounds, ACtrlBounds: TRectF; AVKVisible: Boolean);
var
ACaretRect: TRectF;
function TryByScrollBox(AParent: TFMXObject; var AOffset: Single): TFMXObject;
begin
Result := AParent.Parent;
while Assigned(AParent) and (AOffset < 0) do
begin
if AParent is TCustomScrollBox then
begin
if IsAnimating(AParent as TCustomScrollBox) then
begin
AOffset := 0;
Exit;
end;
AOffset := AOffset - AdjustByScrollBox
(AParent as TCustomScrollBox, AOffset)
end
else if AParent is TCustomPresentedScrollBox then
AOffset := AOffset - AdjustByPresentedScrollBox
(AParent as TCustomPresentedScrollBox, AOffset);
Result := AParent;
AParent := AParent.Parent;
end;
end;
procedure ScrollInToRect;
var
AParent: TFMXObject;
AOffset: Single;
begin
AOffset := AVKBounds.Top - ACaretRect.Bottom;
AParent := TryByScrollBox(ACtrl, AOffset);
if AOffset < 0 then
AdjustByLayout(AParent, AOffset);
end;
procedure AddNextHelper;
var
AHelper: TVKNextHelper;
I: Integer;
AVKCtrl: IVirtualKeyboardControl;
begin
if Supports(ACtrl, IVirtualKeyboardControl, AVKCtrl) then
begin
for I := 0 to ACtrl.ComponentCount - 1 do
begin
if ACtrl.Components[i] is TVKNextHelper then
Exit;
end;
AHelper := TVKNextHelper.Create(ACtrl);
AHelper.SetParent(ACtrl);
end;
end;
begin
if AVKVisible then
begin
if NeedAdjust(ACtrl, ACaretRect) then
begin
if FLastControl <> ACtrl then
begin
if Assigned(FLastControl) then
FLastControl.RemoveFreeNotification(Self);
FLastControl := ACtrl;
FLastControl.FreeNotification(Self);
end;
ScrollInToRect;
end;
if EnableReturnKeyHook then
AddNextHelper;
end
else
begin
FAdjustStack.Restore;
FLastControl := nil;
end;
end;
procedure TVKStateHandler.AdjustIfNeeded;
{$IFDEF ANDROID}
procedure FMXAndroidFix;
var
AService: IFMXVirtualKeyboardService;
AVK: TVirtualKeyboardAndroid;
AListener: TVKListener;
AContext: TRttiContext;
AType: TRttiType;
AField: TRttiField;
begin
if TPlatformServices.Current.SupportsPlatformService
(IFMXVirtualKeyboardService, AService) then
begin
AVK := AService as TVirtualKeyboardAndroid;
AContext := TRttiContext.Create;
AType := AContext.GetType(AVK.ClassType);
if Assigned(AType) then
begin
AField := AType.GetField('FVKListener');
if Assigned(AField) then
begin
AListener := AField.GetValue(AVK).AsObject as TVKListener;
AListener.onVirtualKeyboardHidden;
end;
end;
Screen.ActiveForm.Focused := nil;
end;
end;
procedure UpdateAndroidKeyboardServiceState;
var
ASvc: IFMXVirtualKeyboardService;
AContext: TRttiContext;
AType: TRttiType;
AField: TRttiField;
AInst: TVirtualKeyboardAndroid;
begin
if not Assigned(FVKState) then
begin
if (not Assigned(Screen.FocusControl)) and
TPlatformServices.Current.SupportsPlatformService
(IFMXVirtualKeyboardService, ASvc) then
begin
AInst := ASvc as TVirtualKeyboardAndroid;
AContext := TRttiContext.Create;
AType := AContext.GetType(TVirtualKeyboardAndroid);
AField := AType.GetField('FState');
if AField.GetValue(AInst).AsOrdinal <> 0 then
begin
FVKState := PByte(AInst);
Inc(FVKState, AField.Offset);
end;
end;
end;
if Assigned(FVKState) and (FVKState^ <> 0) then
FVKState^ := 0;
end;
{$ENDIF}
{$IFDEF IOS}
procedure VKHide;
var
ASvc: IFMXVirtualKeyboardService;
begin
if TPlatformServices.Current.SupportsPlatformService
(IFMXVirtualKeyboardService, ASvc) then
ASvc.HideVirtualKeyboard;
end;
{$ENDIF}
procedure RestoreCtrls;
begin
{$IFDEF ANDROID}
if not Assigned(Screen.FocusControl) then
UpdateAndroidKeyboardServiceState;
{$ENDIF}
if Assigned(FLastControl) then
AdjustCtrl(FLastControl, RectF(0, 0, 0, 0),
FLastControl.AbsoluteRect, false);
end;
procedure CheckHidden;
var
ACaretRect: TRectF;
ACtrl: TControl;
begin
if Assigned(Screen.FocusControl) then
begin
ACtrl := Screen.FocusControl.GetObject as TControl;
if Assigned(ACtrl) then
begin
if NeedAdjust(ACtrl, ACaretRect) then
AdjustCtrl(ACtrl, GetVKBounds, ACtrl.AbsoluteRect, True);
end;
end
else
begin
{$IFDEF IOS}
VKHide;
{$ENDIF}
RestoreCtrls;
end;
end;
begin
if IsVKVisible then CheckHidden
else
RestoreCtrls;
end;
constructor TVKStateHandler.Create(AOwner: TComponent);
begin
inherited Create(AOwner);
FAdjustStack := TQAdjustStack.Create;
FVKMsgId := TMessageManager.DefaultManager.SubscribeToMessage
(TVKStateChangeMessage, DoVKVisibleChanged);
FSizeMsgId := TMessageManager.DefaultManager.SubscribeToMessage
(TSizeChangedMessage, DoSizeChanged);
FIdleMsgId := TMessageManager.DefaultManager.SubscribeToMessage(TIdleMessage,
DoAppIdle);
end;
destructor TVKStateHandler.Destroy;
begin
TMessageManager.DefaultManager.Unsubscribe(TVKStateChangeMessage, FVKMsgId);
TMessageManager.DefaultManager.Unsubscribe(TSizeChangedMessage, FSizeMsgId);
TMessageManager.DefaultManager.Unsubscribe(TIdleMessage, FIdleMsgId);
FAdjustStack.Restore;
inherited;
end;
procedure TVKStateHandler.DoAppIdle(const Sender: TObject;
const Msg: System.Messaging.TMessage);
begin
AdjustIfNeeded;
end;
procedure TVKStateHandler.DoSizeChanged(const Sender: TObject;
const Msg: System.Messaging.TMessage);
var
ASizeMsg: TSizeChangedMessage absolute Msg;
R: TRect;
begin
if Sender = Screen.ActiveForm then
begin
FAdjustStack.Restore;
if GetVKBounds(R) then
begin
TMessageManager.DefaultManager.SendMessage(Sender,
TVKStateChangeMessage.Create(True, R));
end
end;
end;
procedure TVKStateHandler.DoVKVisibleChanged(const Sender: TObject;
const Msg: System.Messaging.TMessage);
var
AVKMsg: TVKStateChangeMessage absolute Msg;
ACtrl: TControl;
begin
if AVKMsg.KeyboardVisible then begin
{$IFDEF IOS}
_IOS_VKBounds := TRectF.Create(AVKMsg.KeyboardBounds);
{$ENDIF}
if Screen.FocusControl <> nil then
begin
ACtrl := Screen.FocusControl.GetObject as TControl;
AdjustCtrl(ACtrl, GetVKBounds, ACtrl.AbsoluteRect, True);
end;
end
else
begin
{$IFDEF IOS}
_IOS_VKBounds := TRectF.Empty;
{$ENDIF}
FAdjustStack.Restore;
end;
end;
function TVKStateHandler.IsAnimating(AScrollBox: TCustomScrollBox): Boolean;
var
AContext: TRttiContext;
AType: TRttiType;
AField: TRttiField;
begin
AContext := TRttiContext.Create;
AType := AContext.GetType(AScrollBox.AniCalculations.ClassType);
if Assigned(AType) then
begin
AField := AType.GetField('FStarted');
if Assigned(AField) then
Result := AField.GetValue(AScrollBox.AniCalculations).AsBoolean
else
Result := false;
end
else
Result := false;
end;
function TVKStateHandler.NeedAdjust(ACtrl: TControl;
var ACaretRect: TRectF): Boolean;
var
ACaret: ICaret;
ACaretObj: TCustomCaret;
ACtrlBounds, AVKBounds: TRectF;
function GetRootTop: Single;
var
ALayout: TLayout;
AObj: TFMXObject;
begin
AObj := ACtrl.Root.GetObject;
Result := 0;
if AObj is TForm then
begin
if TForm(AObj).ChildrenCount > 0 then
begin
AObj := TForm(AObj).Children[0];
if AObj is TLayout then
begin
ALayout := AObj as TLayout;
Result := ALayout.Position.Y;
end;
end;
end;
end;
begin
if Supports(ACtrl, ICaret, ACaret) then
begin
AVKBounds := GetVKBounds;
ACtrlBounds := ACtrl.AbsoluteRect;
ACaretObj := ACaret.GetObject;
ACaretRect.TopLeft := ACtrl.LocalToAbsolute(ACaretObj.Pos);
ACaretRect.Right := ACaretRect.Left + ACaretObj.Size.cx + 1;
ACaretRect.Bottom := ACaretRect.Top + ACaretObj.Size.cy + 1; if ACaretRect.Bottom > ACtrlBounds.Bottom then
begin
if ACtrl is TCustomPresentedScrollBox then
begin
AdjustByPresentedScrollBox(ACtrl as TCustomPresentedScrollBox,
ACtrlBounds.Bottom - ACaretRect.Bottom);
Result := false;
Exit;
end;
end;
Result := ACaretRect.IntersectsWith(AVKBounds) or (ACaretRect.Top < 0) or
(ACaretRect.Top > AVKBounds.Bottom);
end
else
Result := false;
end;
procedure TVKStateHandler.Notification(AComponent: TComponent;
Operation: TOperation);
begin
if Operation = opRemove then
begin
if AComponent = FLastControl then
begin
FLastControl.RemoveFreeNotification(Self);
FLastControl := nil;
end
else
FAdjustStack.Remove(AComponent);
end;
inherited;
end;
function TQAdjustStack.GetAdjusted: Boolean;
begin
Result := Assigned(FLast);
end;
function TQAdjustStack.GetLastCtrl: TControl;
begin
if Assigned(FLast) then
Result := FLast.Control
else
Result := nil;
end;
procedure TQAdjustStack.Remove(ACtrl: TComponent);
var
ANext, ACurrent: PAdjustItem;
begin
if Assigned(ACtrl) then
begin
ACurrent := FLast;
ANext := nil;
while Assigned(ACurrent) do
begin
if ACurrent.Control = ACtrl then
begin
if Assigned(ANext) then
ANext.Prior := ACurrent.Prior
else
FLast := ACurrent.Prior;
Dispose(ACurrent);
break;
end;
ANext := ACurrent;
ACurrent := ANext.Prior;
end;
ACtrl.RemoveFreeNotification(VKHandler);
end;
end;
procedure TQAdjustStack.RemoveLast;
var
APrior: PAdjustItem;
begin
if Assigned(FLast) then
begin
APrior := FLast.Prior;
Dispose(FLast);
FLast := APrior;
end;
end;
procedure TQAdjustStack.Restore;
var
APrior: PAdjustItem;
begin
while Assigned(FLast) do
begin
APrior := FLast.Prior;
with FLast^ do
begin
if Control is TCustomScrollBox then
begin
Control.Margins.Bottom := LastMargin.Y;
Control.Margins.Left := LastMargin.X;
(Control as TCustomScrollBox).ViewportPosition := LastViewPos;
end
else if Control is TCustomPresentedScrollBox then
begin
Control.Margins.Bottom := LastMargin.Y;
Control.Margins.Left := LastMargin.X;
(Control as TCustomPresentedScrollBox).ViewportPosition := LastViewPos;
end
else
begin
if LastAlign = TAlignLayout.None then
Control.Position.Point := LastMargin
else
begin
Control.BoundsRect := LastBounds;
Control.Align := LastAlign;
end;
end;
end;
Dispose(FLast);
FLast := APrior;
end;
end;
procedure TQAdjustStack.Save(ACtrl: TControl);
var
AItem: PAdjustItem;
begin
New(AItem);
AItem.Prior := FLast;
AItem.Control := ACtrl;
if ACtrl is TCustomScrollBox then
begin
AItem.LastViewPos := (ACtrl as TCustomScrollBox).ViewportPosition;
AItem.LastMargin.X := ACtrl.Margins.Left;
AItem.LastMargin.Y := ACtrl.Margins.Bottom;
end
else if ACtrl is TCustomPresentedScrollBox then
begin
AItem.LastViewPos := (ACtrl as TCustomPresentedScrollBox).ViewportPosition;
AItem.LastMargin.X := ACtrl.Margins.Left;
AItem.LastMargin.Y := ACtrl.Margins.Bottom;
end
else
begin
AItem.LastMargin := ACtrl.Position.Point;
AItem.LastBounds := ACtrl.BoundsRect;
AItem.LastAlign := ACtrl.Align;
end;
FLast := AItem;
ACtrl.FreeNotification(VKHandler);
end;
procedure TVKNextHelper.DoFocusNext(Sender: TObject; var Key: Word;
var KeyChar: Char; Shift: TShiftState);
var
AVKCtrl: IVirtualKeyboardControl;
procedure FocusNext(ACtrl: TControl);
var
AParent: TControl;
ANext: IControl;
ATabList: ITabList;
begin
if Assigned(ACtrl) and Assigned(ACtrl.ParentControl) then
begin
AParent := ACtrl.ParentControl;
ATabList := AParent.GetTabList;
if Assigned(ATabList) then
begin
ANext := ATabList.FindNextTabStop(ACtrl, not(ssShift in Shift), True);
if Assigned(ANext) then
ANext.SetFocus
else
FocusNext(AParent);
end;
end;
end;
begin
if Assigned(FOriginEvent) then
FOriginEvent(Sender, Key, KeyChar, Shift);
if Supports(Sender, IVirtualKeyboardControl, AVKCtrl) then
begin
if (Key = vkReturn) and (AVKCtrl.ReturnKeyType = TReturnKeyType.Next) then
FocusNext(Sender as TControl);
end;
end;
procedure TVKNextHelper.SetParent(const Value: TFMXObject);
begin
if Value <> Parent then
begin
inherited;
with Parent as TControl do
begin
FOriginEvent := OnKeyDown;
OnKeyDown := DoFocusNext;
end;
end;
end;
initialization
{$IF DEFINED(ANDROID) OR DEFINED(IOS)}
VKHandler := TVKStateHandler.Create(nil);
{$ENDIF}
EnableReturnKeyHook := True;
finalization
{$IF DEFINED(ANDROID) OR DEFINED(IOS)}
VKHandler.DisposeOf;
VKHandler := nil;
{$ENDIF}
end.