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// gomuks - A terminal Matrix client written in Go.
// Copyright (C) 2018 Tulir Asokan
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
package widget
import (
"maunium.net/go/tcell"
"maunium.net/go/tview"
)
// Center wraps the given tview primitive into a Flex element in order to
// vertically and horizontally center the given primitive.
func Center(width, height int, p tview.Primitive) tview.Primitive {
return tview.NewFlex().
AddItem(nil, 0, 1, false).
AddItem(tview.NewFlex().
SetDirection(tview.FlexRow).
AddItem(nil, 0, 1, false).
AddItem(p, height, 1, true).
AddItem(nil, 0, 1, false), width, 1, true).
AddItem(nil, 0, 1, false)
}
type transparentCenter struct {
*tview.Box
prefWidth, prefHeight int
p tview.Primitive
}
func TransparentCenter(width, height int, p tview.Primitive) tview.Primitive {
return &transparentCenter{
Box: tview.NewBox(),
prefWidth: width,
prefHeight: height,
p: p,
}
}
func (tc *transparentCenter) Draw(screen tcell.Screen) {
x, y, width, height := tc.GetRect()
if width > tc.prefWidth {
x += (width - tc.prefWidth) / 2
width = tc.prefWidth
}
if height > tc.prefHeight {
y += (height - tc.prefHeight) / 2
height = tc.prefHeight
}
tc.p.SetRect(x, y, width, height)
tc.p.Draw(screen)
}
func (tc *transparentCenter) Focus(delegate func(p tview.Primitive)) {
if delegate != nil {
delegate(tc.p)
}
}
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