//取得字符的高度 function CharHeight: Word; var Metrics:
TTextMetric; begin GetTextMetrics(Printer.Canvas.Handle,
Metrics); Result :=
Metrics.tmHeight; end;
file://取得字符的平均宽度 function
AvgCharWidth: Word; var Metrics:
TTextMetric; begin GetTextMetrics(Printer.Canvas.Handle,
Metrics); Result :=
Metrics.tmAveCharWidth; end;
file://取得纸张的物理尺寸---单位：点 function
GetPhicalPaper: TPoint; var PageSize :
TPoint; begin file://PageSize.X; 纸张物理宽度-单位:点 file://PageSize.Y;
纸张物理高度-单位:点 Escape(Printer.Handle, GETPHYSPAGESIZE,
0,nil,@PageSize); Result :=
PageSize; end;
file://2.取得纸张的逻辑宽度--可打印区域 file://取得纸张的逻辑尺寸 function
PaperLogicSize: TPoint; var APoint: TPoint; begin APoint.X
:= Printer.PageWidth; APoint.Y := Printer.PageHeight; Result :=
APoint; end;
file://纸张水平对垂直方向的纵横比例 function HVLogincRatio:
Extended; var AP: TPoint; begin Ap :=
PaperLogicSize; Result :=
Ap.y/Ap.X; end;
file://取得纸张的横向偏移量-单位：点 function GetOffSetX:
Integer; begin Result := GetDeviceCaps(Printer.Handle,
PhysicalOffSetX); end;
file://取得纸张的纵向偏移量-单位：点 function
GetOffSetY: Integer; begin Result := GetDeviceCaps(Printer.Handle,
PhysicalOffSetY); end;
file://毫米单位转换为英寸单位 function
MmToInch(Length: Extended): Extended; begin Result :=
Length/25.4; end;
file://英寸单位转换为毫米单位 function
InchToMm(Length: Extended): Extended; begin Result :=
Length*25.4; end;
file://取得水平方向每英寸打印机的点数 function
HPointsPerInch: Integer; begin Result :=
GetDeviceCaps(Printer.Handle,
LOGPIXELSX); end;
file://取得纵向方向每英寸打印机的光栅数 function
VPointsPerInch: Integer; begin Result :=
GetDeviceCaps(Printer.Handle,
LOGPIXELSY) end;
file://横向点单位转换为毫米单位 function XPointToMm(Pos:
Integer): Extended; begin Result :=
Pos*25.4/HPointsPerInch; end;
file://纵向点单位转换为毫米单位 function
YPointToMm(Pos: Integer): Extended; begin Result :=
Pos*25.4/VPointsPerInch; end;
file://设置纸张高度-单位：mm procedure
SetPaperHeight(Value:integer); var Device : array[0..255] of
char; Driver : array[0..255] of char; Port : array[0..255] of
char; hDMode : THandle; PDMode :
PDEVMODE; begin file://自定义纸张最小高度127mm if Value < 127 then
Value := 127; file://自定义纸张最大高度432mm if Value > 432 then Value
:= 432; Printer.PrinterIndex :=
Printer.PrinterIndex; Printer.GetPrinter(Device, Driver, Port,
hDMode); if hDMode <> 0 then begin pDMode :=
GlobalLock(hDMode); if pDMode <> nil
then begin pDMode^.dmFields := pDMode^.dmFields or
DM_PAPERSIZE
or DM_PAPERLENGTH; pDMode^.dmPaperSize :=
DMPAPER_USER; pDMode^.dmPaperLength := Value *
10; pDMode^.dmFields := pDMode^.dmFields or
DMBIN_MANUAL; pDMode^.dmDefaultSource :=
DMBIN_MANUAL; GlobalUnlock(hDMode); end; end; Printer.PrinterIndex
:= Printer.PrinterIndex; end;
file://设置纸张宽度：单位--mm Procedure
SetPaperWidth(Value:integer); var Device : array[0..255] of
char; Driver : array[0..255] of char; Port : array[0..255] of
char; hDMode : THandle; PDMode :
PDEVMODE; begin file://自定义纸张最小宽度76mm if Value < 76 then Value
:= 76; file://自定义纸张最大宽度216mm if Value > 216 then Value :=
216; Printer.PrinterIndex :=
Printer.PrinterIndex; Printer.GetPrinter(Device, Driver, Port,
hDMode); if hDMode <> 0 then begin pDMode :=
GlobalLock(hDMode); if pDMode <> nil
then begin pDMode^.dmFields := pDMode^.dmFields or
DM_PAPERSIZE or
DM_PAPERWIDTH; pDMode^.dmPaperSize :=
DMPAPER_USER; file://将毫米单位转换为0.1mm单位 pDMode^.dmPaperWidth :=
Value * 10; pDMode^.dmFields := pDMode^.dmFields or
DMBIN_MANUAL; pDMode^.dmDefaultSource :=
DMBIN_MANUAL; GlobalUnlock(hDMode); end; end; Printer.PrinterIndex
:= Printer.PrinterIndex; end;
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