lazarus-ccr/components/iosdesigner/iosnibdesigner.pas

{ iOS NOB-designer for the Lazarus IDE

  Copyright (C) 2012 Joost van der Sluis joost@cnoc.nl

  This library is free software; you can redistribute it and/or modify it
  under the terms of the GNU Library General Public License as published by
  the Free Software Foundation; either version 2 of the License, or (at your
  option) any later version with the following modification:

  As a special exception, the copyright holders of this library give you
  permission to link this library with independent modules to produce an
  executable, regardless of the license terms of these independent modules,and
  to copy and distribute the resulting executable under terms of your choice,
  provided that you also meet, for each linked independent module, the terms
  and conditions of the license of that module. An independent module is a
  module which is not derived from or based on this library. If you modify
  this library, you may extend this exception to your version of the library,
  but you are not obligated to do so. If you do not wish to do so, delete this
  exception statement from your version.

  This program is distributed in the hope that it will be useful, but WITHOUT
  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public License
  for more details.

  You should have received a copy of the GNU Library General Public License
  along with this library; if not, write to the Free Software Foundation,
  Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
}

unit iOSNIBDesigner;

{$mode objfpc}{$H+}
{$typeinfo off}

interface

uses
  LCLProc, LCLType, Classes, SysUtils, FormEditingIntf, LCLIntf, Graphics, propedits, CodeToolManager,
  ProjectIntf,
  iOS_Views,
  dom,
  IDEIntf,
  IDEWindowIntf,
  LazIDEIntf,
  Dialogs,
  Controls,
  ComponentReg,
  typinfo,
  forms;

type

  { TNSObjectDesignerMediator }

  TNSObjectDesignerMediator = class(TDesignerMediator,IMyWidgetDesigner)
  private
    FMyForm: NSObject;
  public
    // needed by the lazarus form editor
    class function CreateMediator(TheOwner, aForm: TComponent): TDesignerMediator; override;
    class function FormClass: TComponentClass; override;
    procedure GetBounds(AComponent: TComponent; out CurBounds: TRect); override;
    procedure SetBounds(AComponent: TComponent; NewBounds: TRect); override;
    procedure GetClientArea(AComponent: TComponent; out CurClientArea: TRect; out ScrollOffset: TPoint); override;
    procedure Paint; override;
    function ComponentIsIcon(AComponent: TComponent): boolean; override;
    function ParentAcceptsChild(Parent: TComponent; Child: TComponentClass): boolean; override;
    procedure InitComponent(AComponent, NewParent: TComponent; NewBounds: TRect); override;
    function CreateComponent(ParentComp: TComponent;
                             TypeClass: TComponentClass;
                             const AUnitName: shortstring;
                             X,Y,W,H: Integer;
                             DisableAutoSize: boolean): TComponent;
  public
    // needed by UIView
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
    procedure InvalidateRect(Sender: TObject; ARect: TRect; Erase: boolean);
    property MyForm: NSObject read FMyForm;
  end;

  { TUIResponderDesignerMediator }

  TUIResponderDesignerMediator = class(TNSObjectDesignerMediator)
  public
    class function FormClass: TComponentClass; override;
  end;

procedure Register;

implementation

procedure Register;

  procedure SetFakeUnitname(AClass: TClass);
  var
    ATypInfo: PTypeInfo;
    ATypData: PTypeData;
  begin
    ATypInfo:=PTypeInfo(AClass.ClassInfo);
    ATypData:=GetTypeData(ATypInfo);

    ATypData^.UnitName[1]:='i';
    ATypData^.UnitName[2]:='P';
    ATypData^.UnitName[3]:='h';
    ATypData^.UnitName[4]:='o';
    ATypData^.UnitName[5]:='n';
    ATypData^.UnitName[6]:='e';
    ATypData^.UnitName[7]:='A';
    ATypData^.UnitName[8]:='l';
    ATypData^.UnitName[9]:='l';
  end;

begin
  FormEditingHook.RegisterDesignerMediator(TNSObjectDesignerMediator);
  FormEditingHook.RegisterDesignerMediator(TUIResponderDesignerMediator);
  RegisterComponents('iOS',[UIWindow,UINavigationController,UIButton,UILabel,UITextField,UITableView,UISearchBar,UIView,UIViewController, UIProgressView]);

  RegisterClass(UINavigationItem);
  RegisterClass(UIViewController);
  RegisterClass(UINavigationBar);

  // This is a hack to overwrite the unitname RTTI-information of these objects.
  // This is to make sure that the Codetools add the right unit-name to the
  // source when an object is added to the NIB-file.
  SetFakeUnitname(UIButton);
  SetFakeUnitname(UILabel);
  SetFakeUnitname(UITextField);
  SetFakeUnitname(UITableView);
  SetFakeUnitname(UISearchBar);
  SetFakeUnitname(UIWindow);
  SetFakeUnitname(UIView);
  SetFakeUnitname(UINavigationController);
  SetFakeUnitname(UIViewController);
  SetFakeUnitname(UIProgressView);
end;

{ TNSObjectDesignerMediator }

constructor TNSObjectDesignerMediator.Create(AOwner: TComponent);
begin
  inherited Create(AOwner);
end;

destructor TNSObjectDesignerMediator.Destroy;
begin
  if FMyForm<>nil then FMyForm.Designer:=nil;
  FMyForm:=nil;
  inherited Destroy;
end;

class function TNSObjectDesignerMediator.CreateMediator(TheOwner, aForm: TComponent): TDesignerMediator;
var
  Mediator: TNSObjectDesignerMediator;
begin
  Result:=inherited CreateMediator(TheOwner,aForm);
  Mediator:=TNSObjectDesignerMediator(Result);
  Mediator.FMyForm:=aForm as NSObject;
  Mediator.FMyForm.Designer:=Mediator;
end;

class function TNSObjectDesignerMediator.FormClass: TComponentClass;
begin
  Result:=NSObject;
end;

procedure TNSObjectDesignerMediator.GetBounds(AComponent: TComponent; out CurBounds: TRect);
var
  w: tiOSFakeComponent;
begin
  if AComponent is tiOSFakeComponent then begin
    w:=tiOSFakeComponent(AComponent);
    CurBounds:=Bounds(w.Left,w.Top,w.Width,w.Height);
  end else
    inherited GetBounds(AComponent,CurBounds);
end;

procedure TNSObjectDesignerMediator.InvalidateRect(Sender: TObject; ARect: TRect; Erase: boolean);
begin
  if (LCLForm=nil) or (not LCLForm.HandleAllocated) then exit;
  LCLIntf.InvalidateRect(LCLForm.Handle,@ARect,Erase);
end;

procedure TNSObjectDesignerMediator.SetBounds(AComponent: TComponent; NewBounds: TRect);
begin
  if AComponent is tiOSFakeComponent then begin
    tiOSFakeComponent(AComponent).SetBounds(NewBounds.Left,NewBounds.Top,
      NewBounds.Right-NewBounds.Left,NewBounds.Bottom-NewBounds.Top);
  end else
    inherited SetBounds(AComponent,NewBounds);
end;

procedure TNSObjectDesignerMediator.GetClientArea(AComponent: TComponent; out CurClientArea: TRect; out ScrollOffset: TPoint);
var
  Widget: tiOSFakeComponent;
begin
  if AComponent is tiOSFakeComponent then begin
    Widget:=tiOSFakeComponent(AComponent);
    CurClientArea:=Rect(0,0,
                        Widget.Width,
                        Widget.Height);
    ScrollOffset:=Point(0,0);
  end else
    inherited GetClientArea(AComponent, CurClientArea, ScrollOffset);
end;

procedure TNSObjectDesignerMediator.Paint;

  procedure PaintWidget(AWidget: tiOSFakeComponent);
  var
    i: Integer;
    Child: tiOSFakeComponent;
  begin
    with LCLForm.Canvas do
      begin
      SaveHandleState;
      if AWidget is NSObject then
        begin
        Brush.Style:=bsClear;
        Brush.Color:=clLtGray;
        Pen.Color:=clMaroon;
        Rectangle(0,0,AWidget.Width,AWidget.Height);
        end
      else
        begin
        AWidget.Paint(LCLForm.Canvas);
        end;
      RestoreHandleState;
      // children
      if AWidget.ChildCount>0 then
        begin
        for i:=0 to AWidget.ChildCount-1 do begin
          SaveHandleState;
          Child:=AWidget.Children[i];
          // clip child area
          MoveWindowOrgEx(Handle,Child.Left,Child.Top);
          if IntersectClipRect(Handle,0,0,Child.Width,Child.Height)<>NullRegion then
            PaintWidget(Child);
          RestoreHandleState;
          end;
        end;
      end;
  end;

begin
  PaintWidget(MyForm);
  inherited Paint;
end;

function TNSObjectDesignerMediator.ComponentIsIcon(AComponent: TComponent): boolean;
begin
  Result:=not (AComponent is tiOSFakeComponent);
end;

function TNSObjectDesignerMediator.ParentAcceptsChild(Parent: TComponent; Child: TComponentClass): boolean;
begin
  Result:=(Parent is tiOSFakeComponent) and (Child.InheritsFrom(tiOSFakeComponent))
    and (tiOSFakeComponent(Parent).AcceptChildsAtDesignTime);
end;

procedure TNSObjectDesignerMediator.InitComponent(AComponent, NewParent: TComponent; NewBounds: TRect);
begin
  inherited InitComponent(AComponent, NewParent, NewBounds);
  if AComponent is tiOSFakeComponent then
    tiOSFakeComponent(AComponent).InitializeDefaults;
end;

function TNSObjectDesignerMediator.CreateComponent(ParentComp: TComponent;
  TypeClass: TComponentClass; const AUnitName: shortstring; X, Y, W,
  H: Integer; DisableAutoSize: boolean): TComponent;
begin
  result := FormEditingHook.CreateComponent(ParentComp,TypeClass,AUnitName,x,y,w,h,DisableAutoSize);
end;

{ TUIResponderDesignerMediator }

class function TUIResponderDesignerMediator.FormClass: TComponentClass;
begin
  Result:=UIResponder;
end;

end.