package cview import ( "sync" "github.com/gdamore/tcell/v2" ) // WindowManager provides an area which windows may be added to. type WindowManager struct { *Box windows []*Window sync.RWMutex } // NewWindowManager returns a new window manager. func NewWindowManager() *WindowManager { return &WindowManager{ Box: NewBox(), } } // Add adds a window to the manager. func (wm *WindowManager) Add(w ...*Window) { wm.Lock() defer wm.Unlock() wm.windows = append(wm.windows, w...) } // Clear removes all windows from the manager. func (wm *WindowManager) Clear() { wm.Lock() defer wm.Unlock() wm.windows = nil } // Focus is called when this primitive receives focus. func (wm *WindowManager) Focus(delegate func(p Primitive)) { wm.Lock() defer wm.Unlock() if len(wm.windows) == 0 { return } wm.windows[len(wm.windows)-1].Focus(delegate) } // HasFocus returns whether or not this primitive has focus. func (wm *WindowManager) HasFocus() bool { wm.RLock() defer wm.RUnlock() for _, w := range wm.windows { if w.HasFocus() { return true } } return false } // Draw draws this primitive onto the screen. func (wm *WindowManager) Draw(screen tcell.Screen) { wm.RLock() defer wm.RUnlock() x, y, width, height := wm.GetInnerRect() var hasFullScreen bool for _, w := range wm.windows { if !w.fullscreen { continue } w.SetBorder(false) w.SetRect(x, y+1, width, height-1) w.Draw(screen) hasFullScreen = true } if hasFullScreen { return } for _, w := range wm.windows { w.SetBorder(true) w.SetRect(x+w.x, x+w.y, w.width, w.height) w.Draw(screen) } } // MouseHandler returns the mouse handler for this primitive. func (wm *WindowManager) MouseHandler() func(action MouseAction, event *tcell.EventMouse, setFocus func(p Primitive)) (consumed bool, capture Primitive) { return wm.WrapMouseHandler(func(action MouseAction, event *tcell.EventMouse, setFocus func(p Primitive)) (consumed bool, capture Primitive) { if !wm.InRect(event.Position()) { return false, nil } if action == MouseMove { x, y, _, _ := wm.GetInnerRect() mouseX, mouseY := event.Position() for _, w := range wm.windows { if w.dragWX != -1 || w.dragWY != -1 { offsetX := w.x - (mouseX - x) offsetY := w.y - (mouseY - y) w.x -= offsetX + w.dragWX w.y -= offsetY + w.dragWY consumed = true } if w.dragX != 0 { if w.dragX == -1 { offsetX := w.x - (mouseX - x) if w.width+offsetX >= Styles.WindowMinWidth { w.x -= offsetX w.width += offsetX } } else { offsetX := mouseX - (x + w.x + w.width) if w.width+offsetX >= Styles.WindowMinWidth { w.width += offsetX } } consumed = true } if w.dragY != 0 { if w.dragY == -1 { offsetY := mouseY - (y + w.y + w.height) if w.height+offsetY >= Styles.WindowMinHeight { w.height += offsetY } } else { offsetY := w.y - (mouseY - y) if w.height+offsetY >= Styles.WindowMinHeight { w.y -= offsetY w.height += offsetY } } consumed = true } } } else if action == MouseLeftUp { for _, w := range wm.windows { w.dragX, w.dragY = 0, 0 w.dragWX, w.dragWY = -1, -1 } } // Focus window on mousedown var ( focusWindow *Window focusWindowIndex int ) for i := len(wm.windows) - 1; i >= 0; i-- { if wm.windows[i].InRect(event.Position()) { focusWindow = wm.windows[i] focusWindowIndex = i break } } if focusWindow != nil { if action == MouseLeftDown || action == MouseMiddleDown || action == MouseRightDown { for _, w := range wm.windows { if w != focusWindow { w.Blur() } } wm.windows = append(append(wm.windows[:focusWindowIndex], wm.windows[focusWindowIndex+1:]...), focusWindow) } return focusWindow.MouseHandler()(action, event, setFocus) } return consumed, nil }) }