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FMX.TabControl.pas
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{*******************************************************}
{ }
{ Delphi FireMonkey Platform }
{ }
{ Copyright(c) 2011-2013 Embarcadero Technologies, Inc. }
{ }
{*******************************************************}
unit FMX.TabControl;
interface
uses
System.Classes, System.SysUtils, System.UITypes, System.UIConsts, System.Types, System.Actions,
FMX.ActnList, FMX.Types, FMX.Objects, FMX.StdCtrls, FMX.Controls;
{$SCOPEDENUMS ON}
type
TTabControl = class;
TTabItem = class;
TTabTransition = (ttNone, ttSlide);
TTabTransitionDirection = (tdNormal, tdReversed);
TChangeTabAction = class(TCustomAction)
private
FTransition: TTabTransition;
FDirection: TTabTransitionDirection;
FTab: TTabItem;
procedure SetTab(const Value: TTabItem);
protected
procedure Notification(AComponent: TComponent; Operation: TOperation); override;
public
function HandlesTarget(Target: TObject): Boolean; override;
procedure ExecuteTarget(Target: TObject); override;
procedure CustomTextChanged; override;
function Update: Boolean; override;
published
property CustomText;
property Tab: TTabItem read FTab write SetTab;
property Direction: TTabTransitionDirection read FDirection write FDirection default TTabTransitionDirection.tdNormal;
property Transition: TTabTransition read FTransition write FTransition default TTabTransition.ttNone;
property HelpContext;
property HelpKeyword;
property HelpType;
property Hint;
property ShortCut;
property SecondaryShortCuts;
property Visible;
property OnUpdate;
end;
{ TTabItem }
TTabItem = class(TTextControl)
private
FTabControl: TTabControl;
FContent: TContent;
FAutoWidth: Single;
FAutoHeight: Single;
FAutoSize: Boolean;
FLeftOffset: Single;
FRightOffset: Single;
FIsSelected: Boolean;
FSizeCalculating: Boolean;
FCustomIcon: TImageData;
FItemStyle: TControl;
FIconObject: TImage;
FItemText: TControl;
function GetLeftOffset: Single;
function GetRightOffset: Single;
function GetAutoWidth: Single;
function GetAutoHeight: Single;
procedure SetAutoSize(const Value: Boolean);
procedure SetIsSelected(const Value: Boolean);
procedure SetCustomIcon(const Value: TImageData);
procedure DoIconChanged(AObject: TObject);
protected
procedure CalcSize;
procedure UpdateIcon;
procedure SetWidth(const Value: Single); override;
procedure SetHeight(const Value: Single); override;
procedure DoAddObject(const AObject: TFmxObject); override;
procedure DoChanged; override;
procedure SetText(const Value: string); override;
function FindTextObject: TFmxObject; override;
procedure ApplyStyle; override;
procedure FreeStyle; override;
procedure Loaded; override;
procedure MouseDown(Button: TMouseButton; Shift: TShiftState; X, Y: Single); override;
procedure ChangeParent; override;
procedure Hide; override;
procedure Show; override;
function DoSetHeight(var Value: Single; NewValue: single; var LastValue: Single): boolean; override;
function DoSetWidth(var Value: Single; NewValue: single; var LastValue: Single): boolean; override;
public
constructor Create(AOwner: TComponent); override;
destructor Destroy; override;
published
{ props }
property Align;
property AutoTranslate default True;
property AutoSize: Boolean read FAutoSize write SetAutoSize default True;
property WordWrap default True;
property ClipChildren default False;
property ClipParent default False;
property Cursor default crDefault;
property CustomIcon: TImageData read FCustomIcon write SetCustomIcon;
property DesignVisible default True;
property DragMode default TDragMode.dmManual;
property EnableDragHighlight default True;
property Enabled default True;
property Font;
property StyledSettings;
property Locked default False;
property Height;
property HelpContext;
property HelpKeyword;
property HelpType;
property HitTest default True;
{ trigger }
property IsSelected: Boolean read FIsSelected write SetIsSelected;
property Index stored False;
property Padding;
property Opacity;
property Margins;
property PopupMenu;
property Position;
property RotationAngle;
property RotationCenter;
property Scale;
property StyleLookup;
property TabOrder;
property Text;
property TextAlign default TTextAlign.taCenter;
property Trimming;
property TouchTargetExpansion;
property VertTextAlign;
property Visible default True;
property Width;
property OnApplyStyleLookup;
property OnDragEnter;
property OnDragLeave;
property OnDragOver;
property OnDragDrop;
property OnDragEnd;
property OnClick;
property OnDblClick;
property OnMouseDown;
property OnMouseMove;
property OnMouseUp;
property OnMouseWheel;
property OnMouseEnter;
property OnMouseLeave;
property OnPainting;
property OnPaint;
property OnResize;
end;
{ TTabControl }
TTabPosition = (tpTop, tpBottom, tpNone, tpDots);
TTabControl = class(TStyledControl, IItemsContainer)
private
FContent: TContent;
FNoItemsContent: TControl;
FTabIndex: Integer;
FTabHeight: Single;
FFullSize: Boolean;
FTabPosition: TTabPosition;
FBackground: TControl;
FFixedTabHeight: Boolean;
FOnChange: TNotifyEvent;
FTransitionRunning: Boolean;
FTransitionTabs: array of TTabItem;
procedure SetTabIndex(const Value: integer);
procedure SetTabHeight(const Value: Single);
procedure SetFullSize(const Value: Boolean);
function GetActiveTab: TTabItem;
procedure SetActiveTab(const Value: TTabItem);
procedure SetTabPosition(const Value: TTabPosition);
procedure ApplyTabsStyleLookup;
{ IItemContainer }
function GetItemsCount: Integer;
function GetItem(const AIndex: Integer): TFmxObject;
procedure UpdateItemContentBounds(LItem: TTabItem);
procedure WebBrowserReallign(Sender: TObject);
procedure AnimationFinished(Sender: TObject);
protected
function GetTabItem(AIndex: Integer): TTabItem;
function GetTabCount: Integer;
procedure ApplyStyle; override;
procedure FreeStyle; override;
procedure PaintChildren; override;
procedure RealignTabs; virtual;
procedure DoRealign; override;
procedure ContentAddObject(const AObject: TFmxObject);
procedure ContentRemoveObject(const AObject: TFmxObject);
procedure DoAddObject(const AObject: TFmxObject); override;
procedure DoChange; virtual;
public
constructor Create(AOwner: TComponent); override;
destructor Destroy; override;
procedure SetActiveTabWithTransition(const ATab: TTabItem; ATransition: TTabTransition;
const ADirection: TTabTransitionDirection = TTabTransitionDirection.tdNormal);
function HasActiveTab: Boolean;
property TabCount: Integer read GetTabCount;
property Tabs[AIndex: Integer]: TTabItem read GetTabItem;
published
property Align;
property Anchors;
property ActiveTab: TTabItem read GetActiveTab write SetActiveTab stored False;
property ClipChildren default False;
property ClipParent default False;
property Cursor default crDefault;
property DesignVisible default True;
property DragMode default TDragMode.dmManual;
property EnableDragHighlight default True;
property Enabled default True;
property FullSize: Boolean read FFullSize write SetFullSize default False;
property Locked default False;
property Height;
property HelpContext;
property HelpKeyword;
property HelpType;
property HitTest default True;
property Padding;
property Opacity;
property Margins;
property PopupMenu;
property Position;
property RotationAngle;
property RotationCenter;
property Scale;
property StyleLookup;
property TabHeight: Single read FTabHeight write SetTabHeight;
property TabIndex: Integer read FTabIndex write SetTabIndex default -1;
property TabOrder;
property TabPosition: TTabPosition read FTabPosition write SetTabPosition default TTabPosition.tpTop;
property TouchTargetExpansion;
property Visible default True;
property Width;
property OnApplyStyleLookup;
property OnChange: TNotifyEvent read FOnChange write FOnChange;
property OnDragEnter;
property OnDragLeave;
property OnDragOver;
property OnDragDrop;
property OnDragEnd;
property OnClick;
property OnDblClick;
property OnMouseDown;
property OnMouseMove;
property OnMouseUp;
property OnMouseWheel;
property OnMouseEnter;
property OnMouseLeave;
property OnPainting;
property OnPaint;
property OnResize;
end;
implementation
uses
FMX.Consts, FMX.Ani, FMX.Layouts, System.Math, FMX.Forms, FMX.Platform,
FMX.Pickers, FMX.WebBrowser, FMX.TextLayout.GPU, System.Rtti;
{ TTabItemContent }
type
TTabItemContent = class(TContent);
TOpenControl = class(TControl);
TOpenStyledControl = class(TStyledControl);
{ TChangeTabAction }
procedure TChangeTabAction.CustomTextChanged;
begin
if CustomText = '' then
begin
if Assigned(FTab) then
Text := Format(SGotoTab, [FTab.Text])
else
Text := SGotoNilTab;
end
else
Text := CustomText;
end;
procedure TChangeTabAction.ExecuteTarget(Target: TObject);
var LDirection: TTabTransitionDirection;
begin
inherited;
if Assigned(FTab) and Assigned(FTab.FTabControl) then
begin
LDirection := FDirection;
if FTab.Index < FTab.FTabControl.TabIndex then
begin
if LDirection = TTabTransitionDirection.tdNormal then
LDirection := TTabTransitionDirection.tdReversed
else if LDirection = TTabTransitionDirection.tdReversed then
LDirection := TTabTransitionDirection.tdNormal;
end;
FTab.FTabControl.SetActiveTabWithTransition(FTab, FTransition, LDirection);
end;
end;
function TChangeTabAction.HandlesTarget(Target: TObject): Boolean;
begin
Result := Supported;
end;
function TChangeTabAction.Update: Boolean;
begin
if Supported and ([csLoading, csDestroying] * ComponentState = []) then
CustomTextChanged;
Result := inherited Update;
if not Result then
Enabled := Supported and
Assigned(FTab) and
Assigned(FTab.FTabControl) and
(FTab.FTabControl.TabIndex <> FTab.Index);
end;
procedure TChangeTabAction.Notification(AComponent: TComponent; Operation: TOperation);
begin
inherited;
if (Operation = opRemove) and (AComponent = FTab) then
Tab := nil;
end;
procedure TChangeTabAction.SetTab(const Value: TTabItem);
begin
if FTab <> Value then
begin
FTab := Value;
CustomTextChanged;
end;
end;
{ TTabItem }
constructor TTabItem.Create(AOwner: TComponent);
var
DefaultValueService: IInterface;
TrimmingDefault: TValue;
begin
inherited;
FCustomIcon := TImageData.Create;
FCustomIcon.OnChange := DoIconChanged;
FAutoSize := True;
FContent := TTabItemContent.Create(nil);
FContent.Parent := Self;
FContent.Locked := True;
FContent.Stored := False;
FContent.HitTest := False;
FContent.Visible := False;
FContent.ClipChildren := True;
FAutoWidth := 0;
FAutoHeight := 0;
FDesignInteractive := True;
AutoTranslate := True;
TextAlign := TTextAlign.taCenter;
HitTest := True;
if (csDesigning in ComponentState)
and SupportsPlatformService(IFMXDefaultPropertyValueService, DefaultValueService) then
begin
TrimmingDefault := IFMXDefaultPropertyValueService(DefaultValueService).GetDefaultPropertyValue(Self.ClassName, 'trimming');
if not TrimmingDefault.IsEmpty then
Trimming := TrimmingDefault.AsType<TTextTrimming>;
end;
end;
destructor TTabItem.Destroy;
begin
FreeAndNil(FCustomIcon);
inherited;
end;
procedure TTabItem.DoAddObject(const AObject: TFmxObject);
var
ControlTmp: TControl;
begin
if Assigned(FContent) and not AObject.Equals(FContent) and not AObject.Equals(ResourceLink) then
begin
FContent.AddObject(AObject);
AddToTabList(AObject);
// Correct control position in desgin time
if (csDesigning in ComponentState) and (AObject is TControl) then
begin
ControlTmp := AObject as TControl;
ControlTmp.Position.X := Max(0, ControlTmp.Position.X);
ControlTmp.Position.Y := Max(0, ControlTmp.Position.Y);
end;
end
else
inherited;
end;
procedure TTabItem.DoIconChanged(AObject: TObject);
begin
end;
procedure TTabItem.UpdateIcon;
var
ImageGenSrv: IFMXImageGeneratorService;
begin
if Assigned(FIconObject) then
begin
if SupportsPlatformService(IFMXImageGeneratorService, IInterface(ImageGenSrv)) then
begin
if Assigned(Scene) and (Scene.GetSceneScale > 1.0) then
begin
if not FCustomIcon.BitmapHiRes.IsEmpty then
ImageGenSrv.GenerateTabIcon(FCustomIcon.BitmapHiRes, FIconObject.BitmapHiRes, IsSelected, True)
else
ImageGenSrv.GenerateTabIcon(FCustomIcon.Bitmap, FIconObject.BitmapHiRes, IsSelected, True);
end;
ImageGenSrv.GenerateTabIcon(FCustomIcon.Bitmap, FIconObject.Bitmap, IsSelected, False);
end
else
begin
FIconObject.Bitmap := FCustomIcon.Bitmap;
if not FCustomIcon.BitmapHiRes.IsEmpty then
FIconObject.BitmapHiRes := FCustomIcon.BitmapHiRes
else
FIconObject.BitmapHiRes := FCustomIcon.Bitmap;
end;
end;
end;
procedure TTabItem.ApplyStyle;
var
B: TFmxObject;
begin
if Assigned(FTabControl) and Assigned(ResourceLink) then
begin
case FTabControl.TabPosition of
TTabPosition.tpTop: begin
B := ResourceLink.FindStyleResource('top');
if Assigned(B) and (B is TControl) then
begin
FItemStyle := TControl(B);
FItemStyle.Visible := True;
B := ResourceLink.FindStyleResource('bottom');
if Assigned(B) and (B is TControl) then
TControl(B).Visible := False;
end;
end;
TTabPosition.tpBottom: begin
B := ResourceLink.FindStyleResource('bottom');
if Assigned(B) and (B is TControl) then
begin
FItemStyle := TControl(B);
FItemStyle.Visible := True;
B := ResourceLink.FindStyleResource('top');
if Assigned(B) and (B is TControl) then
TControl(B).Visible := False;
end;
end;
end;
if (not Assigned(FItemStyle)) and Assigned(ResourceControl) then
begin
FItemStyle := ResourceControl;
FItemStyle.Visible := True;
end;
// custom icon
if Assigned(FItemStyle) then
begin
B := TControl(FItemStyle.FindStyleResource('icon'));
if Assigned(B) then
FIconObject := TImage(B);
end;
end;
inherited;
CalcSize;
IsSelected := Assigned(FTabControl) and (FTabControl.TabIndex = Index);
end;
function TTabItem.FindTextObject: TFmxObject;
begin
if Assigned(FItemStyle) then
Result := FItemStyle.FindStyleResource('text')
else
Result := inherited FindTextObject;
end;
procedure TTabItem.FreeStyle;
begin
inherited;
FIconObject := nil;
FItemStyle := nil;
FItemText := nil;
end;
procedure TTabItem.Loaded;
begin
inherited;
// necessary to update FLastWidth and FLastHeight for anchors
TTabItemContent(FContent).Loaded;
// necessary to apply TextSettings from style
IsSelected := Assigned(FTabControl) and (FTabControl.TabIndex = Index);
end;
procedure TTabItem.CalcSize;
var
S: TAlignLayout;
TextMarginRect: TRectF;
begin
if FSizeCalculating or Text.IsEmpty then
Exit;
FSizeCalculating := True;
try
if Assigned(FItemStyle) then
begin
FLeftOffset := FItemStyle.Margins.Left;
FRightOffset := FItemStyle.Margins.Right;
end;
ApplyStyleLookup; // force load style
if not Assigned(FItemStyle) then
Exit;
if Assigned(TextObject) then
begin
TextMarginRect := TextObject.Margins.Rect;
TText(TextObject).Text := Text;
TText(TextObject).WordWrap := False;
S := TextObject.Align;
try
TextObject.Align := TAlignLayout.alNone;
TText(TextObject).AutoSize := True;
FAutoWidth := TextObject.Width + TextMarginRect.Left + TextMarginRect.Right;
FAutoHeight := TextObject.Height + TextMarginRect.Top + TextMarginRect.Bottom;
TText(TextObject).AutoSize := False;
finally
TextObject.Align := S;
end;
end;
finally
FSizeCalculating := False;
end;
end;
procedure TTabItem.DoChanged;
begin
inherited;
if FSizeCalculating then
Exit;
CalcSize;
if Assigned(FTabControl) then
FTabControl.RealignTabs;
end;
procedure TTabItem.MouseDown(Button: TMouseButton; Shift: TShiftState;
X, Y: Single);
begin
inherited MouseDown(Button, Shift, X, Y);
if Button = TMouseButton.mbLeft then
begin
if Assigned(FTabControl) then
FTabControl.TabIndex := Index;
{$IFDEF MSWINDOWS}
if (csDesigning in ComponentState) and IsSelected and (Owner is TCommonCustomForm) and Assigned(TCommonCustomForm(Owner).Designer) then
TCommonCustomForm(Owner).Designer.SelectComponent(Self);
{$ENDIF}
end;
end;
function TTabItem.DoSetHeight(var Value: Single; NewValue: single; var LastValue: Single): boolean;
begin
Result := inherited DoSetHeight(Value, NewValue, LastValue);
if Result and Assigned(FTabControl) and (FTabControl.TabHeight <> 0) and
(FTabControl.TabPosition in [TTabPosition.tpTop, TTabPosition.tpBottom]) then
begin
Result := not SameValue(NewValue, FTabControl.TabHeight);
Value := FTabControl.TabHeight;
end;
end;
function TTabItem.DoSetWidth(var Value: Single; NewValue: single; var LastValue: Single): boolean;
var
SaveValue: Single;
begin
SaveValue := Value;
Result := inherited DoSetWidth(Value, NewValue, LastValue);
if Result and (csDesigning in ComponentState) and Assigned(FTabControl) and (FTabControl.FullSize) and
not (FTabControl.FDisableAlign) and (FTabControl.TabPosition in [TTabPosition.tpTop, TTabPosition.tpBottom]) then
Value := SaveValue;
end;
procedure TTabItem.SetAutoSize(const Value: Boolean);
begin
if FAutoSize <> Value then
begin
FAutoSize := Value;
Height := GetAutoHeight;
Width := GetAutoWidth;
DoChanged;
end;
end;
procedure TTabItem.SetCustomIcon(const Value: TImageData);
begin
FCustomIcon.Assign(Value);
end;
procedure TTabItem.SetHeight(const Value: Single);
begin
if FAutoSize then
FHeight := FAutoHeight;
inherited;
DoChanged;
end;
procedure TTabItem.SetIsSelected(const Value: Boolean);
begin
FIsSelected := Value;
StartTriggerAnimation(Self, 'IsSelected');
ApplyTriggerEffect(Self, 'IsSelected');
UpdateIcon;
end;
procedure TTabItem.ChangeParent;
function FindTabControl: TTabControl;
var
P: TFmxObject;
begin
P := Parent;
while Assigned(P) do
begin
if P is TTabControl then
begin
Result := P as TTabControl;
Exit;
end;
P := P.Parent;
end;
Result := nil;
end;
begin
inherited ChangeParent;
FTabControl := FindTabControl;
NeedStyleLookup;
end;
procedure TTabItem.SetText(const Value: string);
begin
if Text <> Value then
begin
NeedStyleLookup;
inherited;
CalcSize;
if Assigned(FTabControl) then
FTabControl.RealignTabs;
end;
end;
procedure TTabItem.SetWidth(const Value: Single);
begin
if FAutoSize then
FWidth := FAutoWidth;
inherited;
DoChanged;
end;
procedure TTabItem.Show;
begin
inherited Show;
if Assigned(FTabControl) then
FTabControl.Realign;
end;
function TTabItem.GetAutoHeight: Single;
begin
if FAutoSize then
begin
if not (FAutoHeight > 0) then
CalcSize;
Result := FAutoHeight
end
else
Result := FHeight;
end;
function TTabItem.GetAutoWidth: Single;
begin
if FAutoSize then
begin
if not (FAutoWidth > 0) then
CalcSize;
Result := FAutoWidth
end
else
Result := FWidth;
end;
function TTabItem.GetLeftOffset: Single;
begin
Result := FLeftOffset;
end;
function TTabItem.GetRightOffset: Single;
begin
Result := FRightOffset;
end;
procedure TTabItem.Hide;
begin
inherited Hide;
IsSelected := False;
if Assigned(FTabControl) and (FTabControl.TabIndex = Index) then
FTabControl.ActiveTab := nil;
end;
type
TTabControlContent = class(TContent)
protected
procedure DoRealign; override;
procedure DoAddObject(const AObject: TFmxObject); override;
procedure DoRemoveObject(const AObject: TFmxObject); override;
end;
{ TTabContent }
procedure TTabControlContent.DoRealign;
begin
// We have own realign method in TTabControl
end;
procedure TTabControlContent.DoAddObject(const AObject: TFmxObject);
begin
if AObject is TTabItem then
inherited DoAddObject(AObject);
if Assigned(Parent) and (Parent is TTabControl) then
TTabControl(Parent).ContentAddObject(AObject);
end;
procedure TTabControlContent.DoRemoveObject(const AObject: TFmxObject);
begin
inherited;
if Assigned(Parent) and (Parent is TTabControl) then
TTabControl(Parent).ContentRemoveObject(AObject);
end;
{ TTabControl }
constructor TTabControl.Create(AOwner: TComponent);
begin
inherited;
FContent := TTabControlContent.Create(Self);
FContent.Parent := Self;
FContent.Stored := False;
FContent.Locked := True;
FContent.HitTest := False;
FNoItemsContent := TControl.Create(nil);
FNoItemsContent.Parent := Self;
FNoItemsContent.Stored := False;
FNoItemsContent.Locked := True;
FNoItemsContent.HitTest := False;
FTabIndex := -1;
FTabPosition := TTabPosition.tpTop;
AutoCapture := True;
SetBounds(0, 0, 200, 200);
SetAcceptsControls(True);
end;
function TTabControl.GetActiveTab: TTabItem;
begin
if InRange(TabIndex, 0, TabCount - 1) then
Result := Tabs[TabIndex]
else
Result := nil;
end;
function TTabControl.GetItem(const AIndex: Integer): TFmxObject;
begin
Result := Tabs[AIndex];
end;
function TTabControl.GetItemsCount: Integer;
begin
Result := TabCount;
end;
destructor TTabControl.Destroy;
begin
inherited;
end;
procedure TTabControl.DoAddObject(const AObject: TFmxObject);
begin
// If AObject is TabItem, then we add it to the tab items container (FContent)
// If AObject is Effect, Animation, Style resource, we add it to the Self
// In all other cases, we add AObject to active tab or special container (FNoItemsContent)
if AObject is TTabItem then
begin
FContent.AddObject(AObject);
RealignTabs;
if not (csLoading in ComponentState) and (csDesigning in ComponentState) and
not HasActiveTab then
ActiveTab := AObject as TTabItem;
end
else
if (AObject is TEffect) or (AObject is TAnimation) or AObject.Equals(FContent) or
AObject.Equals(FNoItemsContent) or AObject.Equals(ResourceLink) then
inherited DoAddObject(AObject)
else
if HasActiveTab then
ActiveTab.AddObject(AObject)
else
FNoItemsContent.AddObject(AObject);
end;
procedure TTabControl.DoChange;
begin
if Assigned(FOnChange) then
FOnChange(Self);
end;
procedure TTabControl.ContentAddObject(const AObject: TFmxObject);
begin
if not (AObject is TTabItem) then
FNoItemsContent.AddObject(AObject)
else
if FUpdating = 0 then
Realign;
end;
procedure TTabControl.ContentRemoveObject(const AObject: TFmxObject);
begin
if (FUpdating = 0) and (AObject is TTabItem) then
Realign;
end;
procedure TTabControl.AnimationFinished(Sender: TObject);
begin
WebBrowserReallign(Sender);
TAnimation(Sender).Release;
end;
procedure TTabControl.ApplyStyle;
var
B: TFmxObject;
begin
inherited ApplyStyle;
B := FindStyleResource('background');
if Assigned(B) and (B is TControl) then
FBackground := TControl(B);
B := FindStyleResource('FullSize');
if Assigned(B) then
FFullSize := True;
B := FindStyleResource('TabHeight');
if Assigned(B) then
begin
FFixedTabHeight := False;
TabHeight := B.TagFloat;
FFixedTabHeight := True;
end;
ApplyTabsStyleLookup;
RealignTabs;
end;
procedure TTabControl.FreeStyle;
begin
inherited FreeStyle;
FBackground := nil;
FFixedTabHeight := False;
end;
procedure TTabControl.PaintChildren;
var
I: Integer;
Tab: TTabItem;
begin
if (FTabPosition = TTabPosition.tpDots) then
begin
try
inherited PaintChildren;
finally
for I := 0 to TabCount - 1 do
begin
Tabs[I].FDesignSelectionMarks := True;
Tabs[I].FDisablePaint := False;
Tabs[I].PaintInternal;
Tabs[I].FDesignSelectionMarks := False;
end;
end;
end
else if ((FTabPosition = TTabPosition.tpNone) and (csDesigning in ComponentState)) then
begin
for I := 0 to TabCount - 1 do
begin
Tabs[I].FDesignSelectionMarks := False;
if Assigned(Tabs[I].ResourceControl) then
TOpenControl(Tabs[I].ResourceControl).FDisablePaint := True;
end;
try
inherited PaintChildren;
if HasActiveTab then
ActiveTab.PaintInternal;
finally
for I := 0 to TabCount - 1 do
begin
Tabs[I].FDesignSelectionMarks := True;
if Assigned(Tabs[I].ResourceControl) then
TOpenControl(Tabs[I].ResourceControl).FDisablePaint := False;
end;
end;
Canvas.SetMatrix(AbsoluteMatrix);
for I := 0 to TabCount - 1 do
if Tabs[I].Visible then
begin
Canvas.Fill.Kind := TBrushKind.bkSolid;
if I = TabIndex then
Canvas.Fill.Color := $FF1072C5
else
Canvas.Fill.Color := $FF303030;
Canvas.FillEllipse(Tabs[I].ParentedRect, 0.3);
end;
end
else if FTransitionRunning then
begin
inherited PaintChildren;
for Tab in FTransitionTabs do
Tab.PaintInternal;
end
else if HasActiveTab and ActiveTab.Visible then
begin
ActiveTab.FDisablePaint := True;
TOpenControl(FNoItemsContent).FDisablePaint := True;
try
inherited PaintChildren;
finally
ActiveTab.FDisablePaint := False;
TOpenControl(FNoItemsContent).FDisablePaint := False;
end;
ActiveTab.PaintInternal;
TOpenControl(FNoItemsContent).PaintInternal;
end
else
inherited PaintChildren;
end;
procedure TTabControl.RealignTabs;
const
DesignTabWidth = 10;
DesignTabHeight = 10;
var
CountVisibleTab, I: Integer;
CurX, CurY: Single;
L, R, AutoWidth, MaxHeight: Single;
LItem: TTabItem;
begin
{ calc max height }
if TabCount > 0 then
begin
{ Calculate count of visible tabs and Max Height of tabs }
MaxHeight := 0;
CountVisibleTab := 0;
for i := 0 to TabCount - 1 do
begin
LItem := Tabs[i];
if not LItem.Visible then
Continue;
LItem.CalcSize;
if LItem.GetAutoHeight + LItem.Margins.Top + LItem.Margins.Bottom > MaxHeight then
MaxHeight := Trunc(LItem.GetAutoHeight + LItem.Margins.Top + LItem.Margins.Bottom);
Inc(CountVisibleTab);
end;
if MaxHeight < 5 then
MaxHeight := 5;
if CountVisibleTab = 0 then
MaxHeight := 0
else if FTabHeight > 0 then
MaxHeight := FTabHeight;
{ align }
AutoWidth := Width / AbsoluteScale.X;
if Assigned(FBackground) then
AutoWidth := Width - FBackground.Padding.Left - FBackground.Padding.Right;
if FFullSize and (CountVisibleTab > 0) then
AutoWidth := Round(AutoWidth / CountVisibleTab);
case FTabPosition of
TTabPosition.tpTop: FContent.SetBounds(0, 0, Width, MaxHeight);
TTabPosition.tpBottom: FContent.SetBounds(0, Height - MaxHeight, Width, MaxHeight);
TTabPosition.tpNone: FContent.SetBounds(0, 0, 0, 0);
TTabPosition.tpDots: FContent.SetBounds(0, 0, 0, 0);
end;
FNoItemsContent.SetBounds(FContent.Position.X, FContent.Position.Y, FContent.Width, FContent.Height);