fixes #113 Create SimpleStyledTextBar (forgot git add)

views/sstextbar.go

@@ -0,0 +1,90 @@
+// Copyright 2016 The Tcell 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 views
+
+import (
+	"sync"
+
+	"github.com/gdamore/tcell"
+)
+
+// SimpleStyledTextBar is a Widget that provides a single line of text, but
+// with distinct left, center, and right areas.  Each of the areas can be
+// styled differently, and can contain internal style markup.
+// They align to the left, center, and right respectively.
+// This is basically a convenience type on top SimpleStyledText and BoxLayout.
+type SimpleStyledTextBar struct {
+	left    *SimpleStyledText
+	right   *SimpleStyledText
+	center  *SimpleStyledText
+	once    sync.Once
+
+	BoxLayout
+}
+
+// SetRight sets the right text for the textbar.
+// It is always right-aligned.
+func (s *SimpleStyledTextBar) SetRight(m string) {
+	s.right.SetMarkup(m)
+}
+
+// SetLeft sets the left text for the textbar.
+// It is always left-aligned.
+func (s *SimpleStyledTextBar) SetLeft(m string) {
+	s.left.SetMarkup(m)
+}
+
+// SetCenter sets the center text for the textbar.
+// It is always centered.
+func (s *SimpleStyledTextBar) SetCenter(m string) {
+	s.center.SetMarkup(m)
+}
+
+func (s *SimpleStyledTextBar) RegisterRightStyle(r rune, style tcell.Style) {
+	s.right.RegisterStyle(r, style)
+}
+
+func (s *SimpleStyledTextBar) RegisterLeftStyle(r rune, style tcell.Style) {
+	s.left.RegisterStyle(r, style)
+}
+
+func (s *SimpleStyledTextBar) RegisterCenterStyle(r rune, style tcell.Style) {
+	s.center.RegisterStyle(r, style)
+}
+
+func (s *SimpleStyledTextBar) initialize() {
+	s.once.Do(func() {
+		s.center.SetAlignment(VAlignTop | HAlignCenter)
+		s.left.SetAlignment(VAlignTop | HAlignLeft)
+		s.right.SetAlignment(VAlignTop | HAlignRight)
+		s.BoxLayout.SetOrientation(Horizontal)
+		s.BoxLayout.AddWidget(s.left, 0.0)
+		s.BoxLayout.AddWidget(NewSpacer(), 1.0)
+		s.BoxLayout.AddWidget(s.center, 0.0)
+		s.BoxLayout.AddWidget(NewSpacer(), 1.0)
+		s.BoxLayout.AddWidget(s.right, 0.0)
+	})
+}
+
+// NewSimpleStyledTextBar creates an empty, initialized TextBar.
+func NewSimpleStyledTextBar() *SimpleStyledTextBar {
+	s := &SimpleStyledTextBar{
+		center: NewSimpleStyledText(),
+		left: NewSimpleStyledText(),
+		right: NewSimpleStyledText(),
+	}
+	s.initialize()
+	return s
+}