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gb
gb.args
gb.cairo
Cairo
ArcNegative
CairoExtents
CairoFontExtents
CairoMatrix
CairoPattern
CairoPdfSurface
CairoPsSurface
CairoSurface
CairoSvgSurface
CairoTextExtents
gb.chart
gb.clipper
gb.complex
gb.compress
gb.crypt
gb.data
gb.db
gb.db.form
gb.db.mysql
gb.db.odbc
gb.db.postgresql
gb.db.sqlite2
gb.db.sqlite3
gb.dbus
gb.dbus.trayicon
gb.debug
gb.desktop
gb.desktop.x11
gb.eval
gb.eval.highlight
gb.form
gb.form.dialog
gb.form.editor
gb.form.htmlview
gb.form.mdi
gb.form.print
gb.form.terminal
gb.gmp
gb.gsl
gb.gtk
gb.gtk3
gb.gtk3.opengl
gb.gtk3.webview
gb.gui
gb.gui.qt
gb.gui.qt.ext
gb.gui.trayicon
gb.gui.webview
gb.hash
gb.highlight
gb.image
gb.image.effect
gb.image.io
gb.inotify
gb.logging
gb.map
gb.media
gb.media.form
gb.mime
gb.mysql
gb.ncurses
gb.net
gb.net.curl
gb.net.pop3
gb.net.smtp
gb.opengl
gb.opengl.glsl
gb.opengl.glu
gb.opengl.sge
gb.openssl
gb.option
gb.pcre
gb.pdf
gb.poppler
gb.qt4
gb.qt4.ext
gb.qt4.opengl
gb.qt4.webkit
gb.qt4.webview
gb.qt5
gb.qt5.ext
gb.qt5.opengl
gb.qt5.webview
gb.qt6
gb.qt6.ext
gb.qt6.opengl
gb.qt6.webview
gb.report
gb.report2
gb.sdl
gb.sdl2
gb.sdl2.audio
gb.settings
gb.signal
gb.term
gb.test
gb.util
gb.util.web
gb.v4l
gb.vb
gb.web
gb.web.feed
gb.web.form
gb.web.gui
gb.xml
gb.xml.html
gb.xml.rpc
gb.xml.xslt
最近的修改

Cairo.Status (gb.cairo)

Static Property Read Status As Integer

Checks whether an error has previously occurred, by returning the state of the current drawing.

Cairo uses a single status type to represent all kinds of errors. A status value of Cairo.StatusSuccess represents no error and has an integer value of zero. All other status values represent an error.

Cairo's error handling is designed to be easy to use and safe. All major cairo objects retain an error status internally which can be queried anytime by the users using this property. In the mean time, it is safe to call all cairo functions normally even if the underlying object is in an error status. This means that no error handling code is required before or after each individual cairo function call.

This property can take one of the following values: