CentrED/UOLib/UWorldItem.pas

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(*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at
* http://www.opensource.org/licenses/cddl1.php.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at
* http://www.opensource.org/licenses/cddl1.php. If applicable,
* add the following below this CDDL HEADER, with the fields enclosed
* by brackets "[]" replaced with your own identifying * information:
* Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*
*
* Portions Copyright 2007 Andreas Schneider
*)
unit UWorldItem;
{$mode objfpc}{$H+}
interface
uses
Classes, UMulBlock;
type
TWorldBlock = class;
TWorldItem = class(TMulBlock)
constructor Create(AOwner: TWorldBlock);
protected
FOwner, FOrgOwner: TWorldBlock;
FTileID, FOrgTileID: Word;
FX, FOrgX: Word;
FY, FOrgY: Word;
FZ, FOrgZ: ShortInt;
FSelected: Boolean;
FLocked: Boolean;
FChanged: Boolean;
FPriority: Integer;
FPriorityBonus: ShortInt;
FPrioritySolver: Integer;
procedure SetTileID(ATileID: Word);
procedure SetX(AX: Word);
procedure SetY(AY: Word);
procedure SetZ(AZ: ShortInt);
procedure SetSelected(ASelected: Boolean);
procedure SetOwner(AOwner: TWorldBlock);
procedure SetLocked(ALocked: Boolean);
procedure DoChanged;
function HasChanged: Boolean; virtual;
public
procedure UpdatePos(AX, AY: Word; AZ: ShortInt);
procedure Delete;
procedure InitOriginalState; virtual;
property Owner: TWorldBlock read FOwner write SetOwner;
property TileID: Word read FTileID write SetTileID;
property X: Word read FX write SetX;
property Y: Word read FY write SetY;
property Z: ShortInt read FZ write SetZ;
property Selected: Boolean read FSelected write SetSelected;
property Locked: Boolean read FLocked write SetLocked;
property Changed: Boolean read FChanged;
property Priority: Integer read FPriority write FPriority;
property PriorityBonus: ShortInt read FPriorityBonus write FPriorityBonus;
property PrioritySolver: Integer read FPrioritySolver write FPrioritySolver;
end;
TWorldBlock = class(TMulBlock)
constructor Create;
protected
FX: Word;
FY: Word;
FRefCount: Integer;
FChanges: Integer;
function GetChanged: Boolean;
procedure SetChanged(AChanged: Boolean);
procedure DoStateChanged;
public
property X: Word read FX write FX;
property Y: Word read FY write FY;
property RefCount: Integer read FRefCount;
property Changed: Boolean read GetChanged write SetChanged;
procedure AddRef;
procedure RemoveRef;
procedure CleanUp;
end;
implementation
{ TWorldItem }
constructor TWorldItem.Create(AOwner: TWorldBlock);
begin
inherited Create;
FSelected := False;
FLocked := False;
FChanged := False;
FOwner := AOwner;
end;
procedure TWorldItem.Delete;
begin
SetSelected(False);
SetLocked(False);
if (FOwner <> FOrgOwner) then
FOwner.Changed := False
else if Assigned(FOrgOwner) and (not FChanged) then
FOrgOwner.Changed := True;
Free;
end;
procedure TWorldItem.DoChanged;
var
blockChanged: Boolean;
begin
blockChanged := HasChanged;
if Assigned(FOwner) then
begin
if FChanged and (not blockChanged) then
FOwner.Changed := False
else if (not FChanged) and blockChanged then
FOwner.Changed := True;
end;
FChanged := blockChanged;
if Assigned(FOnChanged) then
FOnChanged(Self);
end;
function TWorldItem.HasChanged: Boolean;
begin
Result := (FX <> FOrgX) or (FY <> FOrgY) or (FZ <> FOrgZ) or
(FTileID <> FOrgTileID) or (FOrgOwner <> FOwner);
end;
procedure TWorldItem.InitOriginalState;
begin
{if Assigned(FOrgOwner) and (FOwner <> FOrgOwner) then
FOrgOwner.Changed := False;}
FOrgOwner := FOwner;
FOrgTileID := FTileID;
FOrgX := FX;
FOrgY := FY;
FOrgZ := FZ;
DoChanged;
end;
procedure TWorldItem.SetLocked(ALocked: Boolean);
begin
if FLocked <> ALocked then
begin
FLocked := ALocked;
if Assigned(FOwner) then
if FLocked then
FOwner.AddRef
else
FOwner.RemoveRef;
end;
end;
procedure TWorldItem.SetOwner(AOwner: TWorldBlock);
begin
if FOwner <> AOwner then
begin
if Assigned(FOwner) then
begin
if FOwner <> FOrgOwner then
FOwner.Changed := False;
if FLocked then FOwner.RemoveRef;
if FSelected then FOwner.RemoveRef;
end;
FOwner := AOwner;
if Assigned(FOwner) then
begin
if FOwner <> FOrgOwner then
FOwner.Changed := True;
if FLocked then FOwner.AddRef;
if FSelected then FOwner.AddRef;
end;
DoChanged;
end;
end;
procedure TWorldItem.SetSelected(ASelected: Boolean);
begin
if (FOwner <> nil) and (ASelected <> FSelected) then
if ASelected then
FOwner.AddRef
else
FOwner.RemoveRef;
FSelected := ASelected;
end;
procedure TWorldItem.SetTileID(ATileID: Word);
begin
FTileID := ATileID;
DoChanged;
end;
procedure TWorldItem.SetX(AX: Word);
begin
FX := AX;
DoChanged;
end;
procedure TWorldItem.SetY(AY: Word);
begin
FY := AY;
DoChanged
end;
procedure TWorldItem.SetZ(AZ: ShortInt);
begin
FZ := AZ;
DoChanged;
end;
procedure TWorldItem.UpdatePos(AX, AY: Word; AZ: ShortInt);
begin
FX := AX;
FY := AY;
FZ := AZ;
DoChanged;
end;
{ TWorldBlock }
procedure TWorldBlock.AddRef;
begin
Inc(FRefCount);
DoStateChanged;
end;
procedure TWorldBlock.CleanUp;
begin
FChanges := 0;
DoStateChanged;
end;
constructor TWorldBlock.Create;
begin
inherited Create;
FRefCount := 0;
FChanges := 0;
end;
procedure TWorldBlock.DoStateChanged;
begin
if Assigned(FOnChanged) then
FOnChanged(Self);
end;
function TWorldBlock.GetChanged: Boolean;
begin
Result := (FChanges <> 0);
end;
procedure TWorldBlock.RemoveRef;
begin
if FRefCount > 0 then
Dec(FRefCount);
DoStateChanged;
end;
procedure TWorldBlock.SetChanged(AChanged: Boolean);
begin
if AChanged then
Inc(FChanges)
else
Dec(FChanges);
DoStateChanged;
end;
end.