25 lines
577 B
Go
25 lines
577 B
Go
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package main
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import "errors"
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type alphaCmd struct {
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}
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func (c alphaCmd) Run(args []string, g globalCmd) error {
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if len(args) != 1 {
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return errors.New("an argument is required")
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}
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alpha := toInt(args[0], 255)
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style, _, _ := getWindowLong.Call(uintptr(g.targetHandle), GWL_EXSTYLE)
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setWindowLong.Call(uintptr(g.targetHandle), GWL_EXSTYLE, style|WS_EX_LAYERED)
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setLayeredWindowAttributes.Call(uintptr(g.targetHandle), 0, uintptr(alpha), LWA_ALPHA)
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if alpha == 255 {
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setWindowLong.Call(uintptr(g.targetHandle), GWL_EXSTYLE, style&^WS_EX_LAYERED)
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}
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return nil
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}
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