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/* SPDX-License-Identifier: MIT
*
* Copyright (C) 2019 WireGuard LLC. All Rights Reserved.
*/
package ui
import (
"fmt"
"github.com/lxn/walk"
"github.com/lxn/win"
"golang.org/x/sys/windows"
"golang.zx2c4.com/wireguard/windows/service"
"path"
)
func iconWithOverlayForState(state service.TunnelState, size int) (*walk.Icon, error) {
wireguardIcon, err := walk.NewIconFromResourceWithSize("$wireguard.ico", walk.Size{size, size})
if err != nil {
return nil, err
}
defer wireguardIcon.Dispose()
iconSize := wireguardIcon.Size()
bmp, err := walk.NewBitmapWithTransparentPixels(iconSize)
if err != nil {
return nil, err
}
defer bmp.Dispose()
canvas, err := walk.NewCanvasFromImage(bmp)
if err != nil {
return nil, err
}
defer canvas.Dispose()
if err := canvas.DrawImage(wireguardIcon, walk.Point{}); err != nil {
return nil, err
}
w := int(float64(iconSize.Width) * 0.65)
h := int(float64(iconSize.Height) * 0.65)
bounds := walk.Rectangle{iconSize.Width - w, iconSize.Height - h, w, h}
overlayIcon, err := iconForState(state, bounds.Width)
if err != nil {
return nil, err
}
defer overlayIcon.Dispose()
if err := canvas.DrawImageStretched(overlayIcon, bounds); err != nil {
return nil, err
}
canvas.Dispose()
icon, err := walk.NewIconFromBitmap(bmp)
if err != nil {
return nil, err
}
return icon, nil
}
func iconForState(state service.TunnelState, size int) (icon *walk.Icon, err error) {
switch state {
case service.TunnelStarted:
icon, err = loadSystemIcon("imageres", 101, size)
case service.TunnelStopped:
icon, err = walk.NewIconFromResourceWithSize("dot-gray.ico", walk.Size{size, size}) //TODO: replace with real icon
default:
icon, err = loadSystemIcon("shell32", 238, size) //TODO: this doesn't look that great overlayed on the app icon
}
return
}
func loadSystemIcon(dll string, index int32, size int) (*walk.Icon, error) {
system32, err := windows.GetSystemDirectory()
if err != nil {
return nil, err
}
var hicon win.HICON
ret := win.SHDefExtractIcon(windows.StringToUTF16Ptr(path.Join(system32, dll+".dll")), index, 0, &hicon, nil, uint32(size))
if ret != 0 {
return nil, fmt.Errorf("Unable to find icon %d of %s due to error %d", index, dll, ret)
}
return walk.NewIconFromHICON(hicon)
}
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