75 lines
1.7 KiB
Go
75 lines
1.7 KiB
Go
// 10 february 2014
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package ui
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import (
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// "syscall"
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"unsafe"
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)
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const (
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SPI_GETNONCLIENTMETRICS = 0x0029
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LF_FACESIZE = 32 // from wingdi.h
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)
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type LOGFONT struct {
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lfHeight int32
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lfWidth int32
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lfEscapement int32
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lfOrientation int32
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lfWeight int32
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lfItalic byte
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lfUnderline byte
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lfStrikeOut byte
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lfCharSet byte
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lfOutPrecision byte
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lfClipPrecision byte
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lfQuality byte
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lfPitchAndFamily byte
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lfFaceName [LF_FACESIZE]uint16
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}
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type NONCLIENTMETRICS struct {
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cbSize uint32
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iBorderWidth int
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iScrollWidth int
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iScrollHeight int
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iCaptionWidth int
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iCaptionHeight int
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lfCaptionFont LOGFONT
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iSmCaptionWidth int
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iSmCaptionHeight int
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lfSmCaptionFont LOGFONT
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iMenuWidth int
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iMenuHeight int
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lfMenuFont LOGFONT
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lfStatusFont LOGFONT
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lfMessageFont LOGFONT
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}
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var (
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systemParametersInfo = user32.NewProc("SystemParametersInfoW")
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createFontIndirect = gdi32.NewProc("CreateFontIndirectW")
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)
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// TODO adorn errors with which step failed?
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// TODO this specific font doesn't seem like the right one but that's all I could find for what people actually use; also I need to return the other ones and check HWND types to make sure I apply the right font to the right thing...
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func getStandardWindowFont() (hfont HANDLE, err error) {
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var ncm NONCLIENTMETRICS
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ncm.cbSize = uint32(unsafe.Sizeof(ncm))
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r1, _, err := systemParametersInfo.Call(
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uintptr(SPI_GETNONCLIENTMETRICS),
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uintptr(unsafe.Sizeof(ncm)),
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uintptr(unsafe.Pointer(&ncm)),
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0)
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if r1 == 0 { // failure
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return NULL, err
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}
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// TODO does this specify an error?
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r1, _, err = createFontIndirect.Call(uintptr(unsafe.Pointer(&ncm.lfMessageFont)))
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if r1 == 0 { // failure
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return NULL, err
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}
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return HANDLE(r1), nil
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}
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