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utools.pas
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utools.pas
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unit UTools;
{$mode objfpc}{$H+}
interface
uses
Classes, math, Controls, SysUtils, UFigures, Graphics, UTransform, ExtCtrls,
UParamEditor, FPCanvas, UParameters, UAppState, UHistory;
type
TSelectionMode = (smSelect, smAdd);
TIntArr = array of Integer;
{ TTool }
TTool = class
private
FFigure: TFigure;
FPanel: TPanel;
FIcon: String;
procedure InitParams; virtual;
public
class var FParamEditors: array of TParamEditor;
property Icon: String read FIcon write FIcon;
procedure Init(APanel: TPanel);
procedure AddParamEditor(AParamEditor: TParamEditor);
function GetFigure: TFigure;
procedure MouseDown(AMousePos: TPoint; APenColor, ABrushColor: TColor;
AButton: TMouseButton; AShift: TShiftState; AGControl: TGraphicControl); virtual; abstract;
procedure MouseMove(AMousePos: TPoint); virtual; abstract;
procedure MouseUp(AMousePos: TPoint); virtual;
end;
{ THandTool }
THandTool = class(TTool)
private
FStartingPoint: TDoublePoint;
public
procedure MouseDown(AMousePos: TPoint; APenColor, ABrushColor: TColor;
AButton: TMouseButton; AShift: TShiftState; AGControl: TGraphicControl); override;
procedure MouseMove(AMousePos: TPoint); override;
constructor Create;
end;
{ TMoveTool }
TMoveTool = class(THandTool)
private
FMoved: Boolean;
public
procedure MouseDown(AMousePos: TPoint; APenColor, ABrushColor: TColor;
AButton: TMouseButton; AShift: TShiftState; AGControl: TGraphicControl); override;
procedure MouseMove(AMousePos: TPoint); override;
procedure MouseUp(AMousePos: TPoint); override;
constructor Create;
end;
{ TSelectionTool }
TSelectionTool = class(TTool)
private
FStartingPoint: TDoublePoint;
FShift: TShiftState;
FCommonParams: array of array of TParam;
FGControl: TGraphicControl;
procedure CrossParams(var AParams: TParamArr);
procedure InitParams; override;
public
procedure MouseDown(AMousePos: TPoint; APenColor, ABrushColor: TColor;
AButton: TMouseButton; AShift: TShiftState; AGControl: TGraphicControl); override;
procedure MouseMove(AMousePos: TPoint); override;
procedure MouseUp(AMousePos: TPoint); override;
procedure SelectFigures(ADoubleRect: TDoubleRect);
procedure SelectFigure(ADoublePoint: TDoublePoint; AMode: TSelectionMode);
constructor Create;
end;
{ TMagnifierTool }
TMagnifierTool = class(TTool)
private
FStartingPoint: TDoublePoint;
FMouseButton: TMouseButton;
public
procedure MouseDown(AMousePos: TPoint; APenColor, ABrushColor: TColor;
AButton: TMouseButton; AShift: TShiftState; AGControl: TGraphicControl); override;
procedure MouseMove(AMousePos: TPoint); override;
procedure MouseUp(AMousePos: TPoint); override;
constructor Create;
end;
{ TFigureTool }
TFigureTool = class(TTool)
private
procedure InitParams; override;
procedure SetParams(AParams: array of TParam);
end;
{ TTwoPointFigureTool }
TTwoPointFigureTool = class(TFigureTool)
public
procedure MouseMove(AMousePos: TPoint); override;
end;
{ TFilledFigureTool }
TFilledFigureTool = class(TTwoPointFigureTool)
private
procedure InitParams; override;
end;
{ TPolylineTool }
TPolylineTool = class(TFigureTool)
public
procedure MouseDown(AMousePos: TPoint; APenColor, ABrushColor: TColor;
AButton: TMouseButton; AShift: TShiftState; AGControl: TGraphicControl); override;
procedure MouseMove(AMousePos: TPoint); override;
constructor Create;
end;
{ TRectangleTool }
TRectangleTool = class(TFilledFigureTool)
public
procedure MouseDown(AMousePos: TPoint; APenColor, ABrushColor: TColor;
AButton: TMouseButton; AShift: TShiftState; AGControl: TGraphicControl); override;
constructor Create;
end;
{ TRoundRectangleTool }
TRoundRectangleTool = class(TFilledFigureTool)
private
procedure InitParams; override;
public
procedure MouseDown(AMousePos: TPoint; APenColor, ABrushColor: TColor;
AButton: TMouseButton; AShift: TShiftState; AGControl: TGraphicControl); override;
constructor Create;
end;
{ TLineTool }
TLineTool = class(TTwoPointFigureTool)
public
procedure MouseDown(AMousePos: TPoint; APenColor, ABrushColor: TColor;
AButton: TMouseButton; AShift: TShiftState; AGControl: TGraphicControl); override;
constructor Create;
end;
{ TEllipseTool }
TEllipseTool = class(TFilledFigureTool)
public
procedure MouseDown(AMousePos: TPoint; APenColor, ABrushColor: TColor;
AButton: TMouseButton; AShift: TShiftState; AGControl: TGraphicControl); override;
constructor Create;
end;
{ TRegularPolygonTool }
TRegularPolygonTool = class(TFilledFigureTool)
private
procedure InitParams; override;
public
procedure MouseMove(AMousePos: TPoint); override;
procedure MouseDown(AMousePos: TPoint; APenColor, ABrushColor: TColor;
AButton: TMouseButton; AShift: TShiftState; AGControl: TGraphicControl); override;
constructor Create;
end;
var
Tools: array of TTool;
implementation
{ Misc }
procedure Push(var AArr: TParamArr; var AElement: TParam);
begin
SetLength(AArr, Length(AArr) + 1);
AArr[High(AArr)] := AElement;
end;
procedure Push(var AArr: TIntArr; const AElement: Integer);
begin
SetLength(AArr, Length(AArr) + 1);
AArr[High(AArr)] := AElement;
end;
function IsInArray(i: Integer; AArr: TIntArr): Boolean;
var j: Integer;
begin
for j := Low(AArr) to High(AArr) do begin
if i = AArr[j] then Exit(True);
end;
Result := False;
end;
procedure DeselectAllFigures;
var i: Integer;
begin
for i := Low(Figures) to High(Figures) do Figures[i].IsSelected := False;
end;
procedure RegisterTool(Tool: TTool);
begin
SetLength(Tools, Length(Tools) + 1);
Tools[High(Tools)] := Tool;
end;
{ TMoveTool }
constructor TMoveTool.Create;
begin
Inherited;
FIcon := 'img/move.bmp';
FMoved := False;
end;
procedure TMoveTool.MouseDown(AMousePos: TPoint; APenColor,
ABrushColor: TColor; AButton: TMouseButton; AShift: TShiftState;
AGControl: TGraphicControl);
begin
Inherited;
end;
procedure TMoveTool.MouseMove(AMousePos: TPoint);
var
i: Integer;
Displacement: TDoublePoint;
begin
Displacement := (DispToWorldCoord(AMousePos) - FStartingPoint);
FStartingPoint := DispToWorldCoord(AMousePos);
for i := Low(Figures) to High(Figures) do begin
if Figures[i].IsSelected then
Figures[i].Move(Displacement);
end;
FMoved := True;
end;
procedure TMoveTool.MouseUp(AMousePos: TPoint);
begin
if FMoved then begin
FMoved := False;
History.AddState;
end;
end;
{ TSelectionTool }
constructor TSelectionTool.Create;
begin
Inherited;
FIcon := 'img/selection.bmp';
end;
procedure TSelectionTool.CrossParams(var AParams: TParamArr);
var
i, j: Integer;
IsFound: Boolean;
TempParams: array of array of TParam;
DiffIndexes: TIntArr;
begin
//находим пересечение
for i := Low(FCommonParams) to High(FCommonParams) do begin
IsFound := False;
for j := Low(AParams) to High(AParams) do begin
if FCommonParams[i, 0].ClassType = AParams[j].ClassType then begin
IsFound := True;
Push(FCommonParams[i], AParams[j]);
end;
end;
//запоминаем какие параметры не входят в пересечение
if not IsFound then begin
Push(DiffIndexes, i)
end;
end;
SetLength(TempParams, Length(FCommonParams) - Length(DiffIndexes));
j := Low(TempParams);
for i := Low(FCommonParams) to High(FCommonParams) do begin
if IsInArray(i, DiffIndexes) then Continue;
TempParams[j] := FCommonParams[i];
j += 1;
end;
FCommonParams := TempParams;
end;
procedure TSelectionTool.InitParams;
var
i, j: Integer;
FirstFound: Boolean = False;
FigureParams: TParamArr;
AllEditors: TParamEditorsClassArr;
Editor: TParamEditor;
begin
FCommonParams := Nil;
//ищем пересечения парметров
for i := Low(Figures) to High(Figures) do begin
if Figures[i].IsSelected then begin
FigureParams := Figures[i].GetParams;
if not FirstFound then begin
FirstFound := True;
SetLength(FCommonParams, Length(FigureParams));
for j := Low(FCommonParams) to High(FCommonParams) do begin
SetLength(FCommonParams[j], 1);
FCommonParams[j, 0] := FigureParams[j];
end;
end
else
CrossParams(FigureParams);
end;
end;
AllEditors := GetAllEditors;
for i := Low(FCommonParams) to High(FCommonParams) do begin
for j := Low(AllEditors) to High(AllEditors) do begin
Editor := AllEditors[j].Create;
if FCommonParams[i,0].ClassType = Editor.GetParamType then begin
Editor.AttachParams(FCommonParams[i], FGControl);
AddParamEditor(Editor);
end
else
FreeAndNil(Editor);
end;
end;
end;
procedure TSelectionTool.MouseDown(AMousePos: TPoint; APenColor,
ABrushColor: TColor; AButton: TMouseButton; AShift: TShiftState;
AGControl: TGraphicControl);
begin
FShift := AShift;
FFigure := TSelection.Create(DispToWorldCoord(AMousePos));
FStartingPoint := DispToWorldCoord(AMousePos);
FGControl := AGControl;
end;
procedure TSelectionTool.MouseMove(AMousePos: TPoint);
begin
(FFigure as TSelection).SetSecondPoint(DispToWorldCoord(AMousePos));
end;
procedure TSelectionTool.MouseUp(AMousePos: TPoint);
const
Delta = 3;//px
var
SelectionBounds: TDoubleRect;
SelectionWidth, SelectionHeight: Double;
SelectionMode: TSelectionMode;
begin
if FFigure = Nil then Exit;
SelectionBounds := FFigure.GetBounds;
{TODO: вынести в методы фигур}
SelectionWidth := SelectionBounds.Right - SelectionBounds.Left;
SelectionHeight := SelectionBounds.Bottom - SelectionBounds.Top;
if not (ssCtrl in FShift) then begin
DeselectAllFigures;
SelectionMode := smSelect;
end
else
SelectionMode := smAdd;
if (SelectionWidth > Delta / Scale) or
(SelectionHeight > Delta / Scale)
then
SelectFigures(SelectionBounds)
else
SelectFigure(FStartingPoint, SelectionMode);
FreeAndNil(FFigure);
Init(FPanel);
end;
procedure TSelectionTool.SelectFigures(ADoubleRect: TDoubleRect);
var i: Integer;
begin
for i := High(Figures) downto Low(Figures) do begin
with Figures[i] do begin
if IsIntersect(ADoubleRect) then IsSelected := True;
end;
end;
end;
procedure TSelectionTool.SelectFigure(ADoublePoint: TDoublePoint;
AMode: TSelectionMode);
var i: Integer;
begin
for i := High(Figures) downto Low(Figures) do begin
with Figures[i] do begin
if IsPointInside(ADoublePoint) then begin
if AMode = smAdd then IsSelected := not IsSelected
else IsSelected := True;
Exit;
end;
end;
end;
end;
{ TRoundRectangleTool }
constructor TRoundRectangleTool.Create;
begin
Inherited;
FIcon := 'img/roundrectangle.bmp';
end;
procedure TRoundRectangleTool.InitParams;
begin
Inherited;
AddParamEditor(TXCoeffParamEditor.Create(30));
AddParamEditor(TYCoeffParamEditor.Create(30));
end;
procedure TRoundRectangleTool.MouseDown(AMousePos: TPoint; APenColor,
ABrushColor: TColor; AButton: TMouseButton; AShift: TShiftState;
AGControl: TGraphicControl);
begin
FFigure := TRoundRectangle.Create(DispToWorldCoord(AMousePos), APenColor, ABrushColor);
SetParams(FFigure.GetParams);
end;
{ TRegularPolygonTool }
constructor TRegularPolygonTool.Create;
begin
Inherited;
FIcon := 'img/polygon.bmp';
end;
procedure TRegularPolygonTool.InitParams;
begin
Inherited;
AddParamEditor(TCornersParamEdtitor.Create);
end;
procedure TRegularPolygonTool.MouseMove(AMousePos: TPoint);
begin
(FFigure as TRegularPolygon).SetSecondPoint(DispToWorldCoord(AMousePos));
end;
procedure TRegularPolygonTool.MouseDown(AMousePos: TPoint; APenColor,
ABrushColor: TColor; AButton: TMouseButton; AShift: TShiftState;
AGControl: TGraphicControl);
begin
FFigure := TRegularPolygon.Create(DispToWorldCoord(AMousePos), APenColor, ABrushColor);
SetParams(FFigure.GetParams);
end;
{ TFilledFigureTool }
procedure TFilledFigureTool.InitParams;
begin
Inherited;
AddParamEditor(TBrushStyleParamEditor.Create);
end;
{ TFigureTool }
procedure TFigureTool.InitParams;
begin
AddParamEditor(TLineWidthParamEditor.Create);
AddParamEditor(TLineStyleParamEditor.Create);
end;
procedure TFigureTool.SetParams(AParams: array of TParam);
var
i, j: Integer;
begin
for i := Low(FParamEditors) to High(FParamEditors) do begin
for j := Low(AParams) to High(AParams) do begin
if FParamEditors[i].GetParamType = AParams[j].ClassType then
FParamEditors[i].SetParam(AParams[j]);
end;
end;
end;
{ TMagnifierTool }
constructor TMagnifierTool.Create;
begin
Inherited;
FIcon := 'img/magnifier.bmp';
end;
procedure TMagnifierTool.MouseDown(AMousePos: TPoint; APenColor,
ABrushColor: TColor; AButton: TMouseButton; AShift: TShiftState; AGControl: TGraphicControl);
begin
FMouseButton := AButton;
FFigure := TSelection.Create(DispToWorldCoord(AMousePos));
FStartingPoint := DispToWorldCoord(AMousePos);
end;
procedure TMagnifierTool.MouseMove(AMousePos: TPoint);
begin
(FFigure as TSelection).SetSecondPoint(DispToWorldCoord(AMousePos));
end;
procedure TMagnifierTool.MouseUp(AMousePos: TPoint);
const
Delta = 5;//px
var
XScale, YScale: Double;
SelectionBounds: TDoubleRect;
SelectionWidth, SelectionHeight: Double;
begin
SelectionBounds := FFigure.GetBounds;
SelectionWidth := SelectionBounds.Right - SelectionBounds.Left;
SelectionHeight := SelectionBounds.Bottom - SelectionBounds.Top;
if (SelectionWidth > Delta / Scale) and
(SelectionHeight > Delta / Scale)
then begin
XScale := (DispDimensions.Width) / SelectionWidth;
YScale := (DispDimensions.Height) / SelectionHeight;
Scale := Min(XScale, YScale);
//Размещение по центру
SetCanvasOffset(
SelectionBounds.Left * Scale - (DispDimensions.Width - (SelectionWidth ) * Scale) / 2,
SelectionBounds.Top * Scale - (DispDimensions.Height - (SelectionHeight) * Scale) / 2);
end
else begin
if FMouseButton = mbLeft then IncreaseScale;
if FMouseButton = mbRight then DecreaseScale;
AddCanvasOffset((FStartingPoint - DispToWorldCoord(AMousePos)) * Scale);
end;
FreeAndNil(FFigure);
end;
{ THandTool }
constructor THandTool.Create;
begin
Inherited;
FIcon := 'img/hand.bmp';
end;
procedure THandTool.MouseDown(AMousePos: TPoint; APenColor,
ABrushColor: TColor; AButton: TMouseButton; AShift: TShiftState; AGControl: TGraphicControl);
begin
FStartingPoint := DispToWorldCoord(AMousePos);
end;
procedure THandTool.MouseMove(AMousePos: TPoint);
begin
AddCanvasOffset((FStartingPoint - DispToWorldCoord(AMousePos)) * Scale);
end;
{ TTool }
procedure TTool.AddParamEditor(AParamEditor: TParamEditor);
begin
SetLength(FParamEditors, Length(FParamEditors) + 1);
FParamEditors[High(FParamEditors)] := AParamEditor;
end;
procedure TTool.InitParams;
begin
//заглушка
end;
procedure TTool.Init(APanel: TPanel);
var i: Integer;
begin
for i := Low(FParamEditors) to High(FParamEditors) do begin
FParamEditors[i].Free;
end;
FParamEditors := Nil;
FPanel := APanel;
InitParams;
ShowParamEditors(FParamEditors, APanel);;
end;
function TTool.GetFigure: TFigure;
begin
Result := FFigure;
end;
procedure TTool.MouseUp(AMousePos: TPoint);
begin
//Ничего не делать
end;
{ TTwoPointFigureTool }
procedure TTwoPointFigureTool.MouseMove(AMousePos: TPoint);
begin
(FFigure as TTwoPointFigure).SetSecondPoint(DispToWorldCoord(AMousePos));
end;
{ TPolylineTool }
constructor TPolylineTool.Create;
begin
Inherited;
FIcon := 'img/polyline.bmp';
end;
procedure TPolylineTool.MouseDown(AMousePos: TPoint; APenColor,
ABrushColor: TColor; AButton: TMouseButton; AShift: TShiftState;
AGControl: TGraphicControl);
begin
FFigure := TPolyline.Create(DispToWorldCoord(AMousePos), APenColor);
SetParams(FFigure.GetParams);
end;
procedure TPolylineTool.MouseMove(AMousePos: TPoint);
begin
(FFigure as TPolyline).AddPoint(DispToWorldCoord(AMousePos));
end;
{ TRectangleTool }
constructor TRectangleTool.Create;
begin
Inherited;
FIcon := 'img/rectangle.bmp';
end;
procedure TRectangleTool.MouseDown(AMousePos: TPoint; APenColor,
ABrushColor: TColor; AButton: TMouseButton; AShift: TShiftState;
AGControl: TGraphicControl);
begin
FFigure := TRectangle.Create(DispToWorldCoord(AMousePos), APenColor, ABrushColor);
SetParams(FFigure.GetParams);
end;
{ TEllipseTool }
constructor TEllipseTool.Create;
begin
Inherited;
FIcon := 'img/ellipse.bmp';
end;
procedure TEllipseTool.MouseDown(AMousePos: TPoint; APenColor,
ABrushColor: TColor; AButton: TMouseButton; AShift: TShiftState;
AGControl: TGraphicControl);
begin
FFigure := TEllipse.Create(DispToWorldCoord(AMousePos), APenColor, ABrushColor);
SetParams(FFigure.GetParams);
end;
{ TLineTool }
constructor TLineTool.Create;
begin
Inherited;
FIcon := 'img/line.bmp';
end;
procedure TLineTool.MouseDown(AMousePos: TPoint; APenColor,
ABrushColor: TColor; AButton: TMouseButton; AShift: TShiftState;
AGControl: TGraphicControl);
begin
FFigure := TLine.Create(DispToWorldCoord(AMousePos), APenColor);
SetParams(FFigure.GetParams);
end;
initialization
RegisterTool(THandTool.Create);
RegisterTool(TMoveTool.Create);
RegisterTool(TMagnifierTool.Create);
RegisterTool(TSelectionTool.Create);
RegisterTool(TPolylineTool.Create);
RegisterTool(TRectangleTool.Create);
RegisterTool(TRoundRectangleTool.Create);
RegisterTool(TEllipseTool.Create);
RegisterTool(TLineTool.Create);
RegisterTool(TRegularPolygonTool.Create);
end.