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| { ****************************************************************** }
{ }
{ VCL component TMosaic }
{ }
{ Code generated by Component Create for Delphi }
{ }
{ Generated from source file c:\documents and settings\admin\mes documents\delphi\objets\mosaic.cd }
{ on 1 Jan 2002 at 3:03 }
{ }
{ Copyright © 2010 by Deconchat }
{ }
{ ****************************************************************** }
unit Mosaic;
interface
uses WinTypes, WinProcs, Messages, SysUtils, Classes, Controls,
Forms, Graphics, Extctrls, Jpeg, Dialogs;
{ Unit-wide declarations }
type TPublicGraphicControl=class(TGraphicControl);
{ var }
{ . . . }
type
TMosaic = class(TImage)
private
{ Private fields of TMosaic }
{ Storage for property Mosaic }
FMosaic : Boolean;
{ Private methods of TMosaic }
{ Method to set variable and property values and create objects }
procedure AutoInitialize;
{ Method to free any objects created by AutoInitialize }
procedure AutoDestroy;
{ Read method for property Mosaic }
function GetMosaic : Boolean;
{ Write method for property Mosaic }
procedure SetMosaic(Value : Boolean);
procedure WMSize(var Message: TWMSize); message WM_SIZE;
protected
{ Protected fields of TMosaic }
Mosaic_faite : Boolean;
{ Protected methods of TMosaic }
procedure Loaded; override;
procedure Paint; override;
public
{ Public fields and properties of TMosaic }
{ Public methods of TMosaic }
constructor Create(AOwner: TComponent); override;
destructor Destroy; override;
published
{ Published properties of TMosaic }
property OnDblClick;
property OnDragDrop;
property OnMouseDown;
property OnMouseMove;
property OnMouseUp;
property Mosaic : Boolean read GetMosaic write SetMosaic default False;
end;
procedure Register;
implementation
procedure Register;
begin
{ Register TMosaic with Deconchat as its
default page on the Delphi component palette }
RegisterComponents('Deconchat', [TMosaic]);
end;
{ Method to set variable and property values and create objects }
procedure TMosaic.AutoInitialize;
begin
Mosaic_faite := False;
FMosaic := False;
end; { of AutoInitialize }
{ Method to free any objects created by AutoInitialize }
procedure TMosaic.AutoDestroy;
begin
{ No objects from AutoInitialize to free }
end; { of AutoDestroy }
{ Read method for property Mosaic }
function TMosaic.GetMosaic : Boolean;
begin
Result := FMosaic;
end;
{ Write method for property Mosaic }
procedure TMosaic.SetMosaic(Value : Boolean);
var change : boolean;
begin
change:=fmosaic;
FMosaic := Value;
{ If changing this property affects the appearance of
the component, call Invalidate here so the image will be
updated. }
{ Invalidate; }
Mosaic_faite:=change=fmosaic;
paint;
end;
constructor TMosaic.Create(AOwner: TComponent);
begin
{ Call the Create method of the parent class }
inherited Create(AOwner);
{ AutoInitialize sets the initial values of variables and }
{ properties; also, it creates objects for properties of }
{ standard Delphi object types (e.g., TFont, TTimer, }
{ TPicture) and for any variables marked as objects. }
{ AutoInitialize method is generated by Component Create. }
AutoInitialize;
{ Code to perform other tasks when the component is created }
end;
destructor TMosaic.Destroy;
begin
{ AutoDestroy, which is generated by Component Create, frees any }
{ objects created by AutoInitialize. }
AutoDestroy;
{ Here, free any other dynamic objects that the component methods }
{ created but have not yet freed. Also perform any other clean-up }
{ operations needed before the component is destroyed. }
{ Last, free the component by calling the Destroy method of the }
{ parent class. }
inherited Destroy;
end;
procedure TMosaic.Loaded;
begin
inherited Loaded;
{ Perform any component setup that depends on the property
values having been set }
Mosaic_faite:=false;
end;
procedure TMosaic.Paint;
Var bmp : TBitmap;
n, max : integer;
begin
{ Make this component look like its parent component by calling
its parent's Paint method. }
inherited Paint;
{ To change the appearance of the component, use the methods
supplied by the component's Canvas property (which is of
type TCanvas). For example, }
if (fmosaic) then
begin // Mosaïc à faire
if (not(Mosaic_faite)) then
begin
bmp:= TBitmap.Create;
try
bmp.width:=Picture.Graphic.Width;
bmp.Height:=Picture.Graphic.Height;
bmp.Canvas.draw(0,0,picture.Graphic);
if width/bmp.width>height/bmp.height then
begin
max:=trunc(bmp.width*height/bmp.height);
for n:=0 to trunc(width/max) do
begin
TPublicGraphicControl(self).Canvas.StretchDraw(rect(n*max,0,(n+1)*max,height),bmp);
end;
end else
begin
max:=trunc(bmp.height*width/bmp.width);
for n:=0 to trunc(height/max) do
begin
TPublicGraphicControl(self).Canvas.StretchDraw(rect(0,n*max,width,(n+1)*max),bmp);
end;
end;
finally
bmp.free
end;
Mosaic_faite:=true;
end;
end else
begin // pas de mosaïc
With TPublicGraphicControl(self).Canvas do
begin
Pen.Width:=1;
Pen.Color := clRed;
Pen.Style:=psclear;
Brush.style := bsclear;
Rectangle(0,0,Width+1,Height+1);
end;
end;
end;
procedure TMosaic.WMSize(var Message: TWMSize);
var
W, H: Integer;
begin
Mosaic_faite:=false;
inherited;
{ Copy the new width and height of the component
so we can use SetBounds to change both at once }
W := Width;
H := Height;
{ Code to check and adjust W and H }
{ Update the component size if we adjusted W or H }
if (W <> Width) or (H <> Height) then
inherited SetBounds(Left, Top, W, H);
{ Code to update dimensions of any owned sub-components
by reading their Height and Width properties and updating
via their SetBounds methods }
Message.Result := 0;
paint;
end;
end. |
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