下面是收藏的一些代码,参考一下:
//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;
file://在 (Xmm, Ymm)处按指定配置文件信息和字体输出字符串
procedure PrintText(X, Y: Extended;
Txt: string;
ConfigFileName: string;
FontSize: Integer=12);
var
OrX, OrY: Extended;
Px, Py: Integer;
AP: TPoint;
Fn: TStrings;
FileName: string;
OffSetX, OffSetY: Integer;
begin
file://打开配置文件,读出横向和纵向偏移量
try
Fn := TStringList.Create;
FileName := ExtractFilePath(Application.ExeName) + ConfigFileName;
if FileExists(FileName) then
begin
Fn.LoadFromFile(FileName);
file://横向偏移量
OffSetX := StrToInt(Fn.Values['X']);
file://纵向偏移量
OffSetY := StrToInt(Fn.Values['Y']);
end
else
begin
file://如果没有配置文件,则生成
Fn.Values['X'] := '0';
Fn.Values['Y'] := '0';
Fn.SaveToFile(FileName);
end;
finally
Fn.Free;
end;
X := X + OffSetX;
Y := Y + OffSetY;
Px := Round(Round(X * HPointsPerInch * 10000/25.4) / 10000);
Py := Round(Round(Y * VPointsPerInch * 10000/25.4) / 10000);
Py := Py - GetOffSetY;
file://因为是绝对坐标, 因此, 不用换算成相对于Y轴坐标
Px := Px + 2 * AvgCharWidth;
Printer.Canvas.Font.Name := '宋体';
Printer.Canvas.Font.Size := FontSize;
file://Printer.Canvas.Font.Color/ := clGreen;
Printer.Canvas.TextOut(Px, Py, Txt);
end;