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// 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/zyedidia/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.initialize()
s.right.SetMarkup(m)
}
// SetLeft sets the left text for the textbar.
// It is always left-aligned.
func (s *SimpleStyledTextBar) SetLeft(m string) {
s.initialize()
s.left.SetMarkup(m)
}
// SetCenter sets the center text for the textbar.
// It is always centered.
func (s *SimpleStyledTextBar) SetCenter(m string) {
s.initialize()
s.center.SetMarkup(m)
}
func (s *SimpleStyledTextBar) RegisterRightStyle(r rune, style tcell.Style) {
s.initialize()
s.right.RegisterStyle(r, style)
}
func (s *SimpleStyledTextBar) RegisterLeftStyle(r rune, style tcell.Style) {
s.initialize()
s.left.RegisterStyle(r, style)
}
func (s *SimpleStyledTextBar) RegisterCenterStyle(r rune, style tcell.Style) {
s.initialize()
s.center.RegisterStyle(r, style)
}
func (s *SimpleStyledTextBar) Size() (int, int) {
s.initialize()
w, h := s.BoxLayout.Size()
if h < 1 {
h = 1
}
if w < 1 {
w = 1
}
return w, h
}
func (s *SimpleStyledTextBar) initialize() {
s.once.Do(func() {
s.center = NewSimpleStyledText()
s.left = NewSimpleStyledText()
s.right = NewSimpleStyledText()
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)
})
}
// Init prepares the widget for use, ensuring resources needed are
// allocated, etc.
func (s *SimpleStyledTextBar) Init() {
s.initialize()
}
// NewSimpleStyledTextBar creates an empty, initialized TextBar.
func NewSimpleStyledTextBar() *SimpleStyledTextBar {
s := &SimpleStyledTextBar{}
s.initialize()
return s
}
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