57 lines
1.7 KiB
Go
57 lines
1.7 KiB
Go
// 7 february 2014
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package ui
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import (
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"fmt"
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"os"
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)
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// TODO change what the default window titles are?
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var (
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_messageBox = user32.NewProc("MessageBoxW")
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)
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func _msgBox(parent *Window, primarytext string, secondarytext string, uType uint32) (result int) {
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// http://msdn.microsoft.com/en-us/library/windows/desktop/aa511267.aspx says "Use task dialogs whenever appropriate to achieve a consistent look and layout. Task dialogs require Windows Vista® or later, so they aren't suitable for earlier versions of Windows. If you must use a message box, separate the main instruction from the supplemental instruction with two line breaks."
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text := primarytext
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if secondarytext != "" {
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text += "\n\n" + secondarytext
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}
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ptext := toUTF16(text)
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ptitle := toUTF16(os.Args[0])
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ret := make(chan uiret)
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defer close(ret)
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parenthwnd := _HWND(_NULL)
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if parent != nil {
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parenthwnd = parent.sysData.hwnd
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uType |= _MB_APPLMODAL // only for this window
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} else {
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uType |= _MB_TASKMODAL // make modal to every window in the program (they're all windows of the uitask, which is a single thread)
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}
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uitask <- &uimsg{
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call: _messageBox,
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p: []uintptr{
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uintptr(parenthwnd),
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utf16ToArg(ptext),
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utf16ToArg(ptitle),
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uintptr(uType),
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},
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ret: ret,
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}
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r := <-ret
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if r.ret == 0 { // failure
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panic(fmt.Sprintf("error displaying message box to user: %v\nstyle: 0x%08X\ntitle: %q\ntext:\n%s", r.err, uType, os.Args[0], text))
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}
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return int(r.ret)
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}
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func msgBox(parent *Window, primarytext string, secondarytext string) {
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_msgBox(parent, primarytext, secondarytext, _MB_OK)
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}
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func msgBoxError(parent *Window, primarytext string, secondarytext string) {
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_msgBox(parent, primarytext, secondarytext, _MB_OK | _MB_ICONERROR)
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}
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