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GQUELL.PAS
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Pascal/Delphi Source File
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1992-12-25
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2KB
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108 lines
{$A+,B-,D-,E-,F+,I-,L-,N-,O+,R-,S-,V-}
UNIT GQuell;
INTERFACE
USES GDecl,
GViews,
GDlg,
GDrivers,
GText,
Graph;
type PNewScroller=^TNewScroller;
PScrollWindow=^TScrollWindow;
TScrollWindow=object(TWindow)
Scroller:PNewScroller;
Nr :byte;
constructor Init(var Bounds:TRect;nn:byte;ATitle:str80;AType:byte);
procedure InitWindowScroller; virtual;
destructor Done; virtual;
end;
TNewScroller=object(TScroller)
procedure CreateData(DateiName:string);
procedure ScrollDraw; virtual;
end;
IMPLEMENTATION
{Implementation TScrollWindow}
constructor TScrollWindow.Init(var Bounds:TRect;nn:byte;ATitle:str80;AType:byte);
begin
Nr:=nn;
TWindow.Init(Bounds,ATitle,AType);
end;
procedure TScrollWindow.InitWindowScroller;
var R:TRect;
i:byte;
SBH1,SBV1:PScrollBar;
begin
R:=Frame^.Area;
SBH1:=new(PScrollBar, Init(R,HorizDir));
SBV1:=new(PScrollBar, Init(R,VertDir));
Scroller:=new(PNewScroller, Init(R,SBH1,SBV1));
if Nr=1 then Scroller^.CreateData('WGDEMO.TXT');
if Nr=2 then Scroller^.CreateData('WGDEMO.PAS');
List^.InsertItem(Scroller);
end;
destructor TScrollWindow.Done;
begin
TWindow.Done;
dispose(Scroller, Done);
end;
{Implementation TNewScroller}
procedure TNewScroller.CreateData(DateiName:string);
var f:text;
LfdPtr:PLine;
begin
assign(f,DateiName);
reset(f);
while not EOF(f) do
begin
LfdPtr:=new(PLine, Init);
readln(f,LfdPtr^.Eintrag);
Liste^.InsertItem(LfdPtr);
end;
SetLimit(25,Liste^.AnzElem-1,8,16);
end;
procedure TNewScroller.ScrollDraw;
var i:integer;
LfdPtr:PGroup;
function clip(p,n:byte;z:string):string;
begin
clip:=copy(z,p,n);
end;
begin
Mouse.HideMouse;
with Border do
begin
SetFillStyle(SolidFill,GetPalColor(1));
SetColor(GetPalColor(2));
for i:=Delta.y to WDelta.y do
begin
LfdPtr:=Liste^.GetItems(i);
Bar(A.x,A.y+(i-Delta.y)*Py+10,B.x,A.y+(i-Delta.y)*Py+10+Py);
WriteText(A.x+20,A.y+(i-Delta.y)*Py+10,clip(Delta.x,Spalten*8 div 8-5,PLine(LfdPtr)^.Eintrag));
end;
if VertiScrollBar<>nil then
for i:=(WDelta.y-Delta.y)+1 to Zeilen do
Bar(A.x,A.y+i*Py+10,B.x,A.y+i*Py+10+Py);
end;
Mouse.ShowMouse;
end;
END.