closes #25 - maximize+restore view

composer.go

@@ -323,6 +323,12 @@ func (c *Composer) processKeySeq(ev term.Event) bool {
 		switch ev.Key {
 		case term.KeyCtrlH:
 			return c.moveActiveWindowToBottom()
+		case term.KeyCtrlM:
+			v := c.topView()
+			maximized := v.Maximized()
+			v.SetMaximized(!maximized)
+			c.refreshScreen(true)
+			return true
 		default:
 			return false
 		}
@@ -389,6 +395,11 @@ func (c *Composer) processMouseClick(ev term.Event) {
 		}
 	} else if hit == HitButtonBottom {
 		c.moveActiveWindowToBottom()
+	} else if hit == HitButtonMaximize {
+		v := c.topView()
+		maximized := v.Maximized()
+		v.SetMaximized(!maximized)
+		c.refreshScreen(true)
 	}
 }
 
@@ -476,6 +487,11 @@ func (c *Composer) Theme() Theme {
 	return c.themeManager
 }
 
+// Size returns size of the console(visible) buffer
+func (c *Composer) Size() (int, int) {
+	return term.Size()
+}
+
 func (c *Composer) Logger() *log.Logger {
 	return c.logger
 }

interface.go

@@ -15,6 +15,8 @@ type Screen interface {
 	PutEvent(event Event)
 	// DestroyView removes view from the view list and makes the next view in the view stack active. It is not possible to destroy the last view - Screen must have at least one visible view
 	DestroyView(view View)
+	// Size returns size of the console(visible) buffer
+	Size() (width int, height int)
 
 	Logger() *log.Logger
 }
@@ -206,6 +208,11 @@ type View interface {
 	// RecalculateConstraints used by containers to recalculate new minimal size
 	// depending on its children constraints after a new child is added
 	RecalculateConstraints()
+	// SetMaximized opens the view to full screen or restores its
+	// previous size
+	SetMaximized(maximize bool)
+	// Maximized returns if the view is in full screen mode
+	Maximized() bool
 
 	Logger() *log.Logger
 }

window.go

@@ -9,12 +9,18 @@ import (
 // Window is an implemetation of View managed by Composer.
 type Window struct {
 	ControlBase
-	buttons  ViewButton
-	canvas   Canvas
-	parent   Screen
-	pack     PackType
-	children []Control
-	controls []Control
+	buttons   ViewButton
+	canvas    Canvas
+	parent    Screen
+	pack      PackType
+	children  []Control
+	controls  []Control
+	maximized bool
+	// maximization support
+	origWidth  int
+	origHeight int
+	origX      int
+	origY      int
 	// dialog support
 	modal   bool
 	onClose func(Event)
@@ -551,3 +557,29 @@ func (w *Window) Modal() bool {
 func (w *Window) OnClose(fn func(Event)) {
 	w.onClose = fn
 }
+
+// SetMaximized opens the view to full screen or restores its
+// previous size
+func (w *Window) SetMaximized(maximize bool) {
+	if maximize == w.maximized {
+		return
+	}
+
+	if maximize {
+		w.origX, w.origY = w.Pos()
+		w.origWidth, w.origHeight = w.Size()
+		w.maximized = true
+		w.SetPos(0, 0)
+		width, height := w.parent.Size()
+		w.SetSize(width, height)
+	} else {
+		w.maximized = false
+		w.SetPos(w.origX, w.origY)
+		w.SetSize(w.origWidth, w.origHeight)
+	}
+}
+
+// Maximized returns if the view is in full screen mode
+func (w *Window) Maximized() bool {
+	return w.maximized
+}