PreviewCanvas class

Inheritance

Constructors

PreviewCanvas()

Properties

canvas ↔ Canvas?
getter/setter pairoverride-getter
config ↔ PrinterConfig?
getter/setter pairinherited
defaultConfig → PrinterConfig?
no setterinherited
hashCode → int
The hash code for this object.
no setterinherited
pageSize ↔ PrinterSize?
getter/setter pairoverride
picture ↔ Picture?
getter/setter pair
recorder ↔ PictureRecorder?
getter/setter pair
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited

Methods

addFont(PrinterFontType fontType) → dynamic
inherited
calcTextLeft(String text, int width, AlignEnum fontAlign, PrinterTextStyle style) → int
计算文字左侧位置
inherited
createChild(PrinterConfig config) → PrinterCanvas
创建子Canvas
inherited
drawBarCode(String context, PrinterOffset offset, int height, [int lineWidth = 1]) → dynamic
打印二维码
inherited
drawBarCodeForSize(String? context, PrinterOffset offset, PrinterSize size, [int lineWidth = 1, AlignEnum align = AlignEnum.center]) → dynamic
打印二维码
inherited
drawBitmap(PrinterOffset offset, PrinterSize size, List<List<bool>> bytes) → dynamic
打印图片
inherited
drawLine(PrinterOffset offset, PrinterSize size, [Color color = const Color(0xFF000000)]) → dynamic
打印线条
inherited
drawQRCode(String context, PrinterOffset offset, PrinterSize size, ECCLevelEnum ecc) → dynamic
打印二维码
inherited
drawQRCodeBitmap(String context, PrinterOffset offset, PrinterSize size, ECCLevelEnum ecc) → dynamic
inherited
drawText(String? text, PrinterOffset offset, PrinterSize size, PrinterTextStyle textStyle) → dynamic
打印文字
inherited
end() → dynamic
结束
override
estimateLength(String text, int contentWidth, PrinterTextStyle style) → int
获取text限制在contentWidth后的长度
inherited
getBarCodeWidth(String context, int lineWidth) → int
计算条码宽度
inherited
getFontAsciiWidth(PrinterTextStyle style) → int
获取字体宽度 Ascii
inherited
getFontHeight(PrinterTextStyle style) → int
获取字体高度
inherited
getFontName(PrinterTextStyle style) → String
获取字体名称
inherited
getFontWidth(PrinterTextStyle style) → int
获取字体宽度
inherited
getTextLineHeight(PrinterTextStyle style) → int
inherited
getTextWidth(String text, PrinterTextStyle style) → int
获取文字宽度
inherited
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
reset() → dynamic
重置
override
splitLine(String str, int contentWidth, PrinterTextStyle style) → List<String>
文字自动换行裁剪
inherited
toString() → String
A string representation of this object.
inherited

Operators

operator ==(Object other) → bool
The equality operator.
inherited