70 lines
2.1 KiB
Go
70 lines
2.1 KiB
Go
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// Example show-window-icons shows how to get a list of all top-level client
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// windows managed by the currently running window manager, and show the icon
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// for each window. (Each icon is shown by opening its own window.)
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package main
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import (
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"image/color"
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"log"
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"github.com/jezek/xgbutil"
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"github.com/jezek/xgbutil/ewmh"
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"github.com/jezek/xgbutil/xevent"
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"github.com/jezek/xgbutil/xgraphics"
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)
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var (
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// The icon width and height to use.
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// _NET_WM_ICON will be searched for an icon closest to these values.
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// The icon closest in size to what's specified here will be used.
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// The resulting icon will be scaled to this size.
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// (Set both to 0 to avoid scaling and use the biggest possible icon.)
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iconWidth, iconHeight = 300, 300
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)
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func main() {
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X, err := xgbutil.NewConn()
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if err != nil {
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log.Fatal(err)
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}
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// Get the list of window ids managed by the window manager.
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clients, err := ewmh.ClientListGet(X)
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if err != nil {
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log.Fatal(err)
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}
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// For each client, try to find its icon. If we find one, blend it with
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// a nice background color and show it in its own window.
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// Otherwise, skip it.
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for _, wid := range clients {
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// FindIcon will find an icon closest to the size specified.
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// If one can't be found, the resulting image will be scaled
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// automatically.
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// To avoid scaling the icon, specify '0' for both the width and height.
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// In this case, the largest icon found will be returned.
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xicon, err := xgraphics.FindIcon(X, wid, iconWidth, iconHeight)
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if err != nil {
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log.Printf("Could not find icon for window %d.", wid)
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continue
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}
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// Get the name of this client. (It will be set as the icon window's
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// name.)
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name, err := ewmh.WmNameGet(X, wid)
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if err != nil { // not a fatal error
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log.Println(err)
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name = ""
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}
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// Blend a pink background color so its easy to see that alpha blending
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// works.
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xgraphics.BlendBgColor(xicon, color.RGBA{0xff, 0x0, 0xff, 0xff})
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xicon.XShowExtra(name, false)
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}
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// All we really need to do is block, so a 'select{}' would be sufficient.
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// But running the event loop will emit errors if anything went wrong.
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xevent.Main(X)
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}
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