Закончил Columns из 7-й главы, седьмого упражнения

1 files changed, 86 insertions, 0 deletions

diff --git a/Занимательное программирование/7/7_columns/unit2.pas b/Занимательное программирование/7/7_columns/unit2.pas
new file mode 100644
index 0000000..d4f6f4f
--- /dev/null
+++ b/Занимательное программирование/7/7_columns/unit2.pas
@@ -0,0 +1,86 @@
+unit Unit2;
+
+{$mode ObjFPC}{$H+}
+
+interface
+
+uses
+  Classes, SysUtils;
+
+const
+  StartMSecsPerFrame = 20;
+
+type
+  IGameHandler = class(TObject)
+  private
+    MSecsPerFrame: Integer;
+
+  public
+    Finished: Boolean;
+    constructor Create;
+    procedure DoIteration; virtual; abstract;
+
+    procedure SlowDown;
+    procedure SpeedUp;
+  end;
+
+  TActionThread = class(TThread)
+  private
+    FGameHandler: IGameHandler;
+
+  public
+    constructor Create(AGameHandler: IGameHandler);
+    destructor Destroy;
+
+    property GameHandler: IGameHandler read FGameHandler;
+
+    procedure Execute; override;
+  end;
+
+implementation
+
+constructor IGameHandler.Create;
+begin
+  Finished := false;
+  MSecsPerFrame := StartMSecsPerFrame
+end;
+
+procedure IGameHandler.SlowDown;
+begin
+  MSecsPerFrame := StartMSecsPerFrame
+end;
+
+procedure IGameHandler.SpeedUp;
+begin
+  MSecsPerFrame := 100
+end;
+
+constructor TActionThread.Create(AGameHandler: IGameHandler);
+begin
+  inherited Create(false);
+  FGameHandler := AGameHandler
+end;
+
+destructor TActionThread.Destroy;
+begin
+  FreeAndNil(FGameHandler)
+end;
+
+procedure TActionThread.Execute;
+var
+  OldTime: TDateTime;
+  ToWait: Integer;
+begin
+  while not GameHandler.Finished do
+  begin
+    OldTime := Now;
+    Synchronize(@FGameHandler.DoIteration);
+    { Синхронизация с таймером. }
+    ToWait := Round(GameHandler.MSecsPerFrame - (Now - OldTime) * MSecsPerDay);
+    if ToWait > 0 then
+      Sleep(ToWait)
+  end
+end;
+
+end.
+