/
window.go
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/
window.go
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// Copyright (c) 2022-2023 The Go-Curses Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use file except in compliance with the License.
// You may obtain a copy of the license at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package cdk
import (
"github.com/go-curses/cdk/lib/enums"
"github.com/go-curses/cdk/memphis"
)
const (
TypeWindow CTypeTag = "cdk-window"
PropertyWindowType Property = "window-type"
SignalDraw Signal = "draw"
SignalSetTitle Signal = "set-title"
SignalSetDisplay Signal = "set-display"
)
func init() {
_ = TypesManager.AddType(TypeWindow, nil)
}
// Basic window interface
type Window interface {
Object
Init() bool
Destroy()
GetWindowType() (value enums.WindowType)
SetWindowType(hint enums.WindowType)
SetTitle(title string)
GetTitle() string
GetDisplay() Display
SetDisplay(d Display)
Draw() enums.EventFlag
ProcessEvent(evt Event) enums.EventFlag
}
// Basic window type
type CWindow struct {
CObject
title string
display Display
}
func NewWindow(title string, d Display) Window {
w := &CWindow{
title: title,
display: d,
}
w.Init()
return w
}
func (w *CWindow) Init() bool {
if w.InitTypeItem(TypeWindow, w) {
return true
}
w.CObject.Init()
_ = w.InstallProperty(PropertyWindowType, StructProperty, true, enums.WINDOW_TOPLEVEL)
return false
}
func (w *CWindow) Destroy() {
if display := w.GetDisplay(); display != nil {
display.UnmapWindow(w)
}
w.CObject.Destroy()
}
// GetWindowType returns the type of the window.
// See: enums.WindowType.
func (w *CWindow) GetWindowType() (value enums.WindowType) {
var ok bool
if v, err := w.GetStructProperty(PropertyWindowType); err != nil {
w.LogErr(err)
} else if value, ok = v.(enums.WindowType); !ok {
value = enums.WINDOW_TOPLEVEL // default is top-level?
w.LogError("value stored in %v is not of enums.WindowType: %v (%T)", PropertyWindowType, v, v)
}
return
}
// SetWindowType updates the type of the window.
// See: enums.WindowType
func (w *CWindow) SetWindowType(hint enums.WindowType) {
if err := w.SetStructProperty(PropertyWindowType, hint); err != nil {
w.LogErr(err)
}
}
func (w *CWindow) SetTitle(title string) {
if f := w.Emit(SignalSetTitle, w, title); f == enums.EVENT_PASS {
w.Lock()
w.title = title
w.Unlock()
}
}
func (w *CWindow) GetTitle() string {
w.RLock()
defer w.RUnlock()
return w.title
}
func (w *CWindow) GetDisplay() Display {
w.RLock()
defer w.RUnlock()
return w.display
}
func (w *CWindow) SetDisplay(d Display) {
if f := w.Emit(SignalSetDisplay, w, d); f == enums.EVENT_PASS {
w.Lock()
w.display = d
w.Unlock()
}
}
func (w *CWindow) Draw() enums.EventFlag {
if !w.IsFrozen() {
if surface, err := memphis.GetSurface(w.ObjectID()); err != nil {
w.LogErr(err)
} else {
return w.Emit(SignalDraw, w, surface)
}
}
return enums.EVENT_PASS
}
func (w *CWindow) ProcessEvent(evt Event) enums.EventFlag {
return w.Emit(SignalEvent, w, evt)
}