gui.TabBar dev...

gui/tabbar.go

@@ -0,0 +1,126 @@
+// Copyright 2016 The G3N Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package gui
+
+// TabBar is a panel which can contain other panels organized
+// as horizontal tabs.
+type TabBar struct {
+	Panel           // Embedded panel
+	tabs     []*Tab // Array of tabs
+	selected int    // Index of the selected tab
+}
+
+// Tab describes and individual tab from the TabBar
+type Tab struct {
+	header  Panel  // Tab header
+	label   *Label // Tab optional label
+	icon    *Label // Tab optional icon
+	img     *Image // Tab optional image
+	content Panel  // User content panel
+}
+
+// NewTabBar creates and returns a pointer to a new TabBar widget
+// with the specified width and height
+func NewTabBar(width, height float32) *TabBar {
+
+	return nil
+}
+
+// AddTab creates and adds a new tab with the specified text
+// at end of this TabBar list of tabs.
+func (tb *TabBar) AddTab(text string) *Tab {
+
+	return tb.InsertTab(text, len(tb.tabs))
+}
+
+// InsertTab creates and inserts a new tab at the specified position
+// from left to right.
+// Return nil if the position is invalid
+func (tb *TabBar) InsertTab(text string, pos int) *Tab {
+
+	if pos < 0 || pos > len(tb.tabs) {
+		return nil
+	}
+	tab := new(Tab)
+
+	tb.tabs = append(tb.tabs, nil)
+	copy(tb.tabs[pos+1:], tb.tabs[pos:])
+	tb.tabs[pos] = tab
+	return tab
+}
+
+// RemoveTab removes the tab at the specified position in the TabBar.
+// Returns the pointer of the removed tab or nil if the position is invalid.
+func (tb *TabBar) RemoveTab(pos int) *Tab {
+
+	if pos < 0 || pos >= len(tb.tabs) {
+		return nil
+	}
+	tab := tb.tabs[pos]
+	// Remove tab from array
+	copy(tb.tabs[pos:], tb.tabs[pos+1:])
+	tb.tabs[len(tb.tabs)-1] = nil
+	tb.tabs = tb.tabs[:len(tb.tabs)-1]
+	// Checks if tab was selected
+	if tb.selected == pos {
+
+	}
+	return tab
+}
+
+// TabCount returns the current number of tabs
+func (tb *TabBar) TabCount() int {
+
+	return len(tb.tabs)
+}
+
+// TabAt returns the pointer of the Tab object at the specified index.
+// Return nil if the index is invalid
+func (tb *TabBar) TabAt(idx int) *Tab {
+
+	if idx < 0 || idx >= len(tb.tabs) {
+		return nil
+	}
+	return tb.tabs[idx]
+}
+
+// SetSelected sets the selected tab of the TabBar to the tab with the specified position.
+// Returns the pointer of the selected tab or nil if the position is invalid.
+func (tb *TabBar) SetSelected(pos int) *Tab {
+
+	if pos < 0 || pos >= len(tb.tabs) {
+		return nil
+	}
+
+	tb.selected = pos
+	return tb.tabs[pos]
+}
+
+// recalc recalculates and updates the positions of all tabs
+func (tb *TabBar) recalc() {
+
+}
+
+//
+// Tab methods
+//
+
+// SetText sets the text of the tab header
+func (tab *Tab) SetText(text string) *Tab {
+
+	return tab
+}
+
+// SetIcon sets the icon of the tab header
+func (tab *Tab) SetIcon(icon string) *Tab {
+
+	return tab
+}
+
+// Panel returns a pointer to the specified tab content panel
+func (tab *Tab) Panel() *Panel {
+
+	return &tab.content
+}