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/* SPDX-License-Identifier: MIT
*
* Copyright (C) 2019 WireGuard LLC. All Rights Reserved.
*/
package ui
import (
"github.com/lxn/walk"
"golang.zx2c4.com/wireguard/windows/service"
)
type sizeAndState struct {
size walk.Size
state service.TunnelState
}
type TunnelStatusImageProvider struct {
imagesBySizeAndState map[sizeAndState]*walk.Bitmap
stoppedBrush *walk.SolidColorBrush
startingBrush *walk.SolidColorBrush
startedBrush *walk.SolidColorBrush
statusPen *walk.CosmeticPen
}
func NewTunnelStatusImageProvider() (*TunnelStatusImageProvider, error) {
tsip := &TunnelStatusImageProvider{imagesBySizeAndState: make(map[sizeAndState]*walk.Bitmap)}
var err error
var disposables walk.Disposables
defer disposables.Treat()
if tsip.stoppedBrush, err = walk.NewSolidColorBrush(walk.RGB(239, 239, 239)); err != nil {
return nil, err
}
disposables.Add(tsip.stoppedBrush)
if tsip.startingBrush, err = walk.NewSolidColorBrush(walk.RGB(255, 211, 31)); err != nil {
return nil, err
}
disposables.Add(tsip.startingBrush)
if tsip.startedBrush, err = walk.NewSolidColorBrush(walk.RGB(0, 255, 0)); err != nil {
return nil, err
}
disposables.Add(tsip.startedBrush)
if tsip.statusPen, err = walk.NewCosmeticPen(walk.PenSolid, walk.RGB(191, 191, 191)); err != nil {
return nil, err
}
disposables.Add(tsip.statusPen)
disposables.Spare()
return tsip, nil
}
func (tsip *TunnelStatusImageProvider) Dispose() {
if tsip.imagesBySizeAndState != nil {
for _, img := range tsip.imagesBySizeAndState {
img.Dispose()
}
tsip.imagesBySizeAndState = nil
}
if tsip.stoppedBrush != nil {
tsip.stoppedBrush.Dispose()
tsip.stoppedBrush = nil
}
if tsip.startingBrush != nil {
tsip.startingBrush.Dispose()
tsip.startingBrush = nil
}
if tsip.startedBrush != nil {
tsip.startedBrush.Dispose()
tsip.startedBrush = nil
}
if tsip.statusPen != nil {
tsip.statusPen.Dispose()
tsip.statusPen = nil
}
}
func (tsip *TunnelStatusImageProvider) ImageForTunnel(tunnel *service.Tunnel, size walk.Size) (*walk.Bitmap, error) {
state, err := tunnel.State()
if err != nil {
return nil, err
}
return tsip.ImageForState(state, size)
}
func (tsip *TunnelStatusImageProvider) ImageForState(state service.TunnelState, size walk.Size) (*walk.Bitmap, error) {
key := sizeAndState{size, state}
if img, ok := tsip.imagesBySizeAndState[key]; ok {
return img, nil
}
var disposables walk.Disposables
defer disposables.Treat()
img, err := walk.NewBitmapWithTransparentPixels(size)
if err != nil {
return nil, err
}
canvas, err := walk.NewCanvasFromImage(img)
if err != nil {
return nil, err
}
defer canvas.Dispose()
if err := tsip.PaintForState(state, canvas, walk.Rectangle{0, 0, size.Width, size.Height}); err != nil {
return nil, err
}
tsip.imagesBySizeAndState[key] = img
disposables.Spare()
return img, nil
}
func (tsip *TunnelStatusImageProvider) PaintForTunnel(tunnel *service.Tunnel, canvas *walk.Canvas, bounds walk.Rectangle) error {
state, err := tunnel.State()
if err != nil {
return err
}
return tsip.PaintForState(state, canvas, bounds)
}
func (tsip *TunnelStatusImageProvider) PaintForState(state service.TunnelState, canvas *walk.Canvas, bounds walk.Rectangle) error {
var brush *walk.SolidColorBrush
switch state {
case service.TunnelStarted:
brush = tsip.startedBrush
case service.TunnelStarting:
brush = tsip.startingBrush
default:
brush = tsip.stoppedBrush
}
b := bounds
b.X = 4
b.Y += 4
b.Height -= 8
b.Width = b.Height
if err := canvas.FillEllipse(brush, b); err != nil {
return err
}
if err := canvas.DrawEllipse(tsip.statusPen, b); err != nil {
return err
}
return nil
}
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