// CreateCursorExtra features all available parameters to creating a cursor.
// It will return an error if there is a problem with any of the requests
// made to create the cursor.
// (This implies each request is a checked request. The performance loss is
// probably acceptable since cursors should be created once and reused.)
func CreateCursorExtra(xu *xgbutil.XUtil, cursor, foreRed, foreGreen,
foreBlue, backRed, backGreen, backBlue uint16) (xproto.Cursor, error) {
fontId, err := xproto.NewFontId(xu.Conn())
if err != nil {
return 0, err
}
cursorId, err := xproto.NewCursorId(xu.Conn())
if err != nil {
return 0, err
}
err = xproto.OpenFontChecked(xu.Conn(), fontId,
uint16(len("cursor")), "cursor").Check()
if err != nil {
return 0, err
}
err = xproto.CreateGlyphCursorChecked(xu.Conn(), cursorId, fontId, fontId,
cursor, cursor+1,
foreRed, foreGreen, foreBlue,
backRed, backGreen, backBlue).Check()
if err != nil {
return 0, err
}
err = xproto.CloseFontChecked(xu.Conn(), fontId).Check()
if err != nil {
return 0, err
}
return cursorId, nil
}
func initDesktop(xScreen *xp.ScreenInfo) {
xFont, err := xp.NewFontId(xConn)
if err != nil {
log.Fatal(err)
}
xCursor, err := xp.NewCursorId(xConn)
if err != nil {
log.Fatal(err)
}
err = xp.OpenFontChecked(xConn, xFont, uint16(len("cursor")), "cursor").Check()
if err != nil {
log.Fatal(err)
}
const xcLeftPtr = 68 // XC_left_ptr from cursorfont.h.
err = xp.CreateGlyphCursorChecked(
xConn, xCursor, xFont, xFont, xcLeftPtr, xcLeftPtr+1,
0xffff, 0xffff, 0xffff, 0, 0, 0).Check()
if err != nil {
log.Fatal(err)
}
err = xp.CloseFontChecked(xConn, xFont).Check()
if err != nil {
log.Fatal(err)
}
desktopXWin, err = xp.NewWindowId(xConn)
if err != nil {
log.Fatal(err)
}
desktopXGC, err = xp.NewGcontextId(xConn)
if err != nil {
log.Fatal(err)
}
desktopWidth = xScreen.WidthInPixels
desktopHeight = xScreen.HeightInPixels
if err := xp.CreateWindowChecked(
xConn, xScreen.RootDepth, desktopXWin, xScreen.Root,
0, 0, desktopWidth, desktopHeight, 0,
xp.WindowClassInputOutput,
xScreen.RootVisual,
xp.CwOverrideRedirect|xp.CwEventMask,
[]uint32{
1,
xp.EventMaskExposure,
},
).Check(); err != nil {
log.Fatal(err)
}
if len(xSettings) != 0 {
initXSettings()
}
if err := xp.ConfigureWindowChecked(
xConn,
desktopXWin,
xp.ConfigWindowStackMode,
[]uint32{
xp.StackModeBelow,
},
).Check(); err != nil {
log.Fatal(err)
}
if err := xp.ChangeWindowAttributesChecked(
xConn,
desktopXWin,
xp.CwBackPixel|xp.CwCursor,
[]uint32{
xScreen.BlackPixel,
uint32(xCursor),
},
).Check(); err != nil {
log.Fatal(err)
}
if err := xp.CreateGCChecked(
xConn,
desktopXGC,
xp.Drawable(xScreen.Root),
0,
nil,
).Check(); err != nil {
log.Fatal(err)
}
if err := xp.MapWindowChecked(xConn, desktopXWin).Check(); err != nil {
log.Fatal(err)
}
}