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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,154 @@ | ||
| package walk | ||
|
|
||
| import ( | ||
| "github.com/lxn/win" | ||
| ) | ||
|
|
||
| type ToolTipErrorPresenter struct { | ||
| toolTip *ToolTip | ||
| curWidget Widget | ||
| widget2error map[Widget]error | ||
| trackedBoundsChangedHandles map[Window]int | ||
| form Form | ||
| formActivatingHandle int | ||
| formDeactivatingHandle int | ||
| } | ||
|
|
||
| func NewToolTipErrorPresenter() (*ToolTipErrorPresenter, error) { | ||
| tt, err := newToolTip(win.TTS_BALLOON) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| succeeded := false | ||
| defer func() { | ||
| if !succeeded { | ||
| tt.Dispose() | ||
| } | ||
| }() | ||
|
|
||
| succeeded = true | ||
|
|
||
| return &ToolTipErrorPresenter{ | ||
| toolTip: tt, | ||
| widget2error: make(map[Widget]error), | ||
| trackedBoundsChangedHandles: make(map[Window]int), | ||
| formActivatingHandle: -1, | ||
| formDeactivatingHandle: -1, | ||
| }, nil | ||
| } | ||
|
|
||
| func (ttep *ToolTipErrorPresenter) Dispose() { | ||
| if ttep.toolTip != nil { | ||
| ttep.untrack() | ||
| ttep.toolTip.Dispose() | ||
| ttep.toolTip = nil | ||
| if ttep.form != nil { | ||
| ttep.form.AsFormBase().activatingPublisher.event.Detach(ttep.formActivatingHandle) | ||
| ttep.form.AsFormBase().deactivatingPublisher.event.Detach(ttep.formDeactivatingHandle) | ||
| ttep.form = nil | ||
| } | ||
| } | ||
| } | ||
|
|
||
| func (ttep *ToolTipErrorPresenter) PresentError(err error, widget Widget) { | ||
| if ttep.toolTip == nil { | ||
| return | ||
| } | ||
|
|
||
| if err == nil && widget == ttep.curWidget { | ||
| ttep.untrack() | ||
| } | ||
|
|
||
| if err == nil { | ||
| ttep.toolTip.RemoveTool(widget) | ||
| delete(ttep.widget2error, widget) | ||
| } else { | ||
| ttep.toolTip.addTrackedTool(widget) | ||
| ttep.widget2error[widget] = err | ||
| } | ||
|
|
||
| var found bool | ||
| if widget != nil { | ||
| walkDescendants(widget.Form().AsFormBase().clientComposite, func(w Window) bool { | ||
| wt := w.(Widget) | ||
|
|
||
| if !found { | ||
| if e, ok := ttep.widget2error[wt]; ok { | ||
| err, widget, found = e, wt, true | ||
| } | ||
| } | ||
|
|
||
| return true | ||
| }) | ||
| } | ||
|
|
||
| if found { | ||
| if widget != ttep.curWidget { | ||
| ttep.untrack() | ||
| } | ||
|
|
||
| if ve, ok := err.(*ValidationError); ok { | ||
| ttep.toolTip.SetErrorTitle(ve.title) | ||
| ttep.toolTip.SetText(widget, ve.message) | ||
| } else { | ||
| ttep.toolTip.SetErrorTitle(tr("Invalid Input")) | ||
| ttep.toolTip.SetText(widget, err.Error()) | ||
| } | ||
|
|
||
| if widget != ttep.curWidget { | ||
| ttep.track(widget) | ||
| } | ||
| } | ||
| } | ||
|
|
||
| func (ttep *ToolTipErrorPresenter) track(widget Widget) { | ||
| var wnd Window | ||
|
|
||
| wnd = widget | ||
|
|
||
| for wnd != nil { | ||
| handle := wnd.AsWindowBase().boundsChangedPublisher.event.Attach(func() { | ||
| ttep.toolTip.track(widget) | ||
| }) | ||
|
|
||
| ttep.trackedBoundsChangedHandles[wnd] = handle | ||
|
|
||
| if ttep.form == nil { | ||
| ttep.form = widget.Form() | ||
| ttep.formActivatingHandle = ttep.form.AsFormBase().activatingPublisher.event.Attach(func() { | ||
| ttep.toolTip.track(widget) | ||
| }) | ||
| ttep.formDeactivatingHandle = ttep.form.AsFormBase().deactivatingPublisher.event.Attach(func() { | ||
| ttep.toolTip.track(widget) | ||
| }) | ||
| } | ||
|
|
||
| if w, ok := wnd.(Widget); ok { | ||
| if parent := w.Parent(); parent != nil { | ||
| wnd = parent | ||
| } | ||
| } else { | ||
| break | ||
| } | ||
| } | ||
|
|
||
| ttep.toolTip.track(widget) | ||
|
|
||
| ttep.curWidget = widget | ||
| } | ||
|
|
||
| func (ttep *ToolTipErrorPresenter) untrack() { | ||
| if ttep.curWidget == nil { | ||
| return | ||
| } | ||
|
|
||
| ttep.toolTip.untrack(ttep.curWidget) | ||
|
|
||
| for wnd, handle := range ttep.trackedBoundsChangedHandles { | ||
| wnd.AsWindowBase().boundsChangedPublisher.event.Detach(handle) | ||
| delete(ttep.trackedBoundsChangedHandles, wnd) | ||
| } | ||
|
|
||
| ttep.curWidget = nil | ||
| } |
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