procedure Ellipse(X1, Y1, X2, Y2: Integer);
Ellipse Pen. Brush. (X1, Y1) (X2, Y2) , .
procedure Rectangle(X1, Y1, X2, Y2: Integer);
Pen , (X1, Y1), - (X2, Y2). Brush.
-
-
:
. <>
..
< >:
..
:
1. →
2. :
3. : OnMouseDown
4.
Form1.Canvas.Ellipse(X+sizeObj, Y+sizeObj, X-sizeObj, Y-sizeObj);
sizeObj - : const sizeObj=20;
5. (F9) , .
, .
. .
.
6. , . : OnPaint.
, . , (Form1.Width).
procedure TForm1.FormPaint(Sender: TObject);
var i:integer;
begin
for i:=0 to Round(Form1.Width/sizeObj) do
Form1.canvas.Rectangle(sizeObj*i, 0, sizeObj*(i+1), sizeObj);
end;
7. . , . , sizeObj. : OnResize
:
Form1.Width:=sizeObj*round(Form1.Width/sizeObj);
8. .
:
, (Form1. Height/sizeObj).
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FormPaint :
procedure TForm1.FormPaint(Sender: TObject);
var i:integer;
begin
for i:=0 to Round(Form1.Width/sizeObj) do {create Top Windows}
Form1.canvas.Rectangle(sizeObj*i, 0, sizeObj*(i+1), sizeObj);
for i:=0 to Round(Form1. Height/sizeObj) do {create Left Windows}
Form1.canvas.Rectangle(0,sizeObj*i, sizeObj, sizeObj*(i+1));
for i:=0 to Round(Form1. Height/sizeObj) do {create Right Windows}
Form1.canvas.Rectangle(Form1.Width,sizeObj*i,
Form1.Width- sizeObj, sizeObj*(i+1));
end;
9. , 7 , (Form1. Height)
10. , . : OnKeyDown:
.
, Key Word. , - . , : :
ShowMessage(IntToStr(Key));
. ← = 37, → =39. - Ord ('S').
, .. . - . coorXObj . Integer, coorXObj:integer=sizeObj;
11. .
Key=37 coorXObj , Key=39 coorXObj .
if Key=37 then coorXObj:=coorXObj-sizeObj;
if Key=39 then coorXObj:=coorXObj+sizeObj;
12. , FormPaint:
Form1.canvas.Rectangle(coorXObj, Form1.Height- sizeObj,
coorXObj+sizeObj, Form1.Height);
13. . , . , . , FormKeyDown .
FormPaint(Sender);
14. . , . ,
Form1.Repaint
15. . , . coorXObj .
sizeObj <=coorXObj and coorXObj <= (Form1.Width 2*sizeObj).
procedure TForm1.FormKeyDown(Sender: TObject; var Key: Word; Shift: TShiftState);
begin
if (Key=37) and not (sizeObj =coorXObj) then coorXObj:=coorXObj-sizeObj;
if (Key=39) and not (coorXObj = (Form1.Width - 2*sizeObj)) then
coorXObj:=coorXObj+sizeObj;
Form1.Repaint;
end;
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16. , coorXObj .
17.
1. .
2. .
3. , .
18. - , . System
.
OnTimer
19. , , . , .
type TBall=class
X,Y, dx,dy:integer;
procedure SetDefault;
end;
procedure TBall.SetDefault;
begin
X:=sizeObj;
Y:=sizeObj;
dx:=1;
dy:=2;
end;
var
Ball:TBall;
, , .
:
If key = 116 then { - F5}
StartNewGame;
StartNewGame , TForm1.
:
procedure TForm1.StartNewGame;
begin
Ball:= TBall.Create; { }
Ball.SetDefault;
Timer1.Enabled:=True; { }
end;
20. Timer1Timer - .
Ball.X:= Ball.X+ Ball.dx;
Ball.Y:= Ball.Y+ Ball.dy;
100.
21. .
record
Type TMinMax=record
min,max:integer;
End;
Type TField=record
X,Y: TMinMax;
End;
Var
WorkField: TField;
22. procedure CalculationWorkField; TForm1;.
:
procedure TForm1.CalculationWorkField;
begin
WorkField.X.min:=sizeObj;
WorkField.Y.min:=sizeObj;
WorkField.X.max:=Form1.Width-sizeObj;
WorkField.Y.max:=Form1.Height-sizeObj;
end;
23. CalculationWorkField .. FormResize.
24. . FormKeyDown. .
if (Key=37) and not (coorXObj= sizeObj) then coorXObj:=coorXObj-sizeObj;
if (Key=39) and not (coorXObj = (Form1.Width - 4*sizeObj)) then
coorXObj:=coorXObj+sizeObj;
:
if (Key=37) and not (coorXObj = WorkField.X.min) then coorXObj:=coorXObj-sizeObj;
if (Key=39) and not (coorXObj = (WorkField.X. max - 3*sizeObj)) then
coorXObj:=coorXObj+sizeObj;
, , 3* sizeObj ( ).
FormPaint , :
| - | |
| Form1.Width/sizeObj | WorkField.X.max/sizeObj |
| Form1.Height/sizeObj | WorkField.Y.max/sizeObj |
:
for i:=0 to Round(Form1.Height/sizeObj) do {create Right Windows}
Form1.canvas.Rectangle(Form1.Width,sizeObj*i,
Form1.Width- sizeObj, sizeObj*(i+1));
for i:=0 to 2 do
Form1.canvas.Rectangle(coorXObj+sizeObj*i, Form1.Height- sizeObj,
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coorXObj+sizeObj*(i+1), Form1.Height);
:
for i:=0 to Round(WorkField.Y.max/sizeObj) do {create Right Windows}
Form1.canvas.Rectangle(WorkField.X.max,sizeObj*i,
WorkField.X.max+ sizeObj, sizeObj*(i+1));
for i:=0 to 2 do
Form1.canvas.Rectangle(coorXObj+sizeObj*i, WorkField.Y.max,
coorXObj+sizeObj*(i+1), WorkField.Y.max+ sizeObj);
25. Timer1Timer.
If (Ball.X= WorkField.X.min) or (Ball.X= WorkField.X.max- sizeObj) then
Ball.dx:= -1*Ball.dx;
Y, , .
If (Ball.Y= WorkField.Y.min) then Ball.dy:= -1*Ball.dy; { }
If (Ball.Y= WorkField.Y.max -sizeObj) then begin { }
if ((coorXObj<= Ball.X) and (coorXObj+3* sizeObj >= Ball.X)) then
Ball.dy:= -1*Ball.dy
Else begin
ShowMessage('Game over');
Timer1.Enabled:=false; { }
GameIsStart:=false;
Ball.Free;{ }
end;
end;
, , sizeObj
26. , Timer1Timer, (TBall) function Move():Boolean; . : BallInOutWorkField=true; {- }
function TBall.Move():Boolean;
begin
result:=not BallInOutWorkField;
X:= X+ dx;
Y:= Y+ dy;
If (X= WorkField.X.min) or (X= WorkField.X.max- sizeObj) then
dx:= -1*dx;
If (Y= WorkField.Y.min) then dy:= -1*dy;
If (Y= WorkField.Y.max- sizeObj) then begin { }
if ((coorXObj<= X) and
(coorXObj+3* sizeObj >= X)) then
dy:= -1*dy
Else result:=BallInOutWorkField;
end;
end;
27. Timer1Timer.
procedure TForm1.Timer1Timer(Sender: TObject);
begin
if Ball.Move()=BallInOutWorkField then begin
ShowMessage('Game over');
Timer1.Enabled:=false; { }
GameIsStart:=false;
Ball.Free;
end;
Form1.Repaint;
end;
28. . Draw()
procedure TBall.Draw();
begin
Form1.canvas.Ellipse(X, Y, X+sizeObj, Y+sizeObj);
end;
FormPaint.
Ball.Draw();
29. . , StartNewGame, , Ball.. Ball.Draw(), (GameIsStart) .
Var GameIsStart: Boolean=false;
StartNewGame GameIsStart:=true; { }
FormPaint
If GameIsStart then TBall.Draw();
30. . , . :
if ((coorXObj<= X+sizeObj/2) and
(coorXObj+3* sizeObj >= X+sizeObj/2)) then
31. . . .
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32. :
.
. ( )
. .
.
33. , .
B
MySQL
1. MySQL. : libmysql.dll.
2. SQLbd
TMySQL50Connection ( )
TSQLTransaction
TSQLQuery ( , )
3. Data Access TDatasource.
4. ( , ).
| MySQL50Connection1.Transaction | SQLTransaction1 |
| SQLTransaction1.Database | MySQL50Connection1 |
| SQLQuery1.Database | MySQL50Connection1 |
| SQLQuery1.Transaction | SQLTransaction1 |
| Datasource1.DataSet | SQLQuery1 |
5. , MySQL50Connection1 :
DatabaseName=FileSystem
HostName=localhost
UserName=root
DatabaseName - ,
HostName - ,
UserName - ,
Password - ( )
6.
procedure TForm1.ConnectToBase();
begin
try
MySQL50Connection1.Connected:=true;
except
ShowMessage(' '+
MySQL50Connection1.DatabaseName);
exit;
end;
try
SQLQuery1.Active:=false;
SQLQuery1.SQL.Clear;
SQLQuery1.sql.add(
'SET character_set_client='+#39+'utf8'+#39+
', character_set_connection='+#39+'utf8'+#39+
',character_set_results='+
#39+'utf8'+#39+';');
SQLQuery1.ExecSQL;
SQLQuery1.SQL.Clear;
except
ShowMessage(' .');
end;
end;
, MySQL , , SQLQuery1 SQL , .
SET character_set_results='utf8'; /* */
SET character_set_client='utf8'; /* */
SET character_set_connection='utf8' /* , , .*/
7. , . ( D.S., users usersDS)
procedure TForm1.CreateAllTable();
begin
if SQLQuery1.Active then SQLQuery1.Close;
SQLQuery1.SQL.Clear;
SQLQuery1.SQL.Add(
'create table '+
'if not exists usersDS' +
'('+
' id INTEGER PRIMARY KEY '+
' AUTO_INCREMENT NOT NULL'+
', username varchar(255)'+
', rating INTEGER UNSIGNED'+
', color_ball varchar(20)'+
', color_racket varchar(20)'+
', color_walls varchar(20)'+
', color_background varchar(20)'+
');');
SQLQuery1.ExecSQL;
end;
8. .
SQLQuery1.SQL.Clear;
SQLQuery1.SQL.Add('Select * from usersDS;');
SQLQuery1.Open;
SQLQuery1.DataSet.First;
If Datasource1.DataSet.IsEmpty then
ShowMessage(' ');
else begin
with Datasource1.DataSet do begin
username:=FieldByName('username').AsWideString;
rating:=FieldByName('rating').AsInteger;
// username
// TComboBox TListBox
end;
end;
9. . .
procedure TForm1.DisConnect();
begin
SQLQuery1.Active:=false;
SQLTransaction1.Commit;
MySQL50Connection1.Connected:=false;
end;
10.
try
SQLQuery1.Close;
SQLQuery1.SQL.Clear;
SQLQuery1.sql.add('UPDATE usersDS SET rating=100;');
SQLQuery1.ExecSQL;
except
ShowMessage(' SQL .');
exit;
end;
