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Code Issues Releases Wiki Activity

Making menu better

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This commit is contained in:
Brian Buller 2016-02-24 21:33:33 -06:00
parent ad7e3807a0
commit 9b7cb328b9
1 changed files with 57 additions and 17 deletions
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74
termbox_menu.go
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@ -1,10 +1,6 @@
package termboxUtil
import (
"strconv"
"github.com/nsf/termbox-go"
)
import "github.com/nsf/termbox-go"
// Menu is a menu with a list of options
type Menu struct {
@ -195,6 +191,40 @@ func (i *Menu) SelectNextOption() {
}
}
// SelectPageUpOption Goes up 'menu height' options
func (i *Menu) SelectPageUpOption() {
idx := i.GetSelectedIndex()
idx -= i.height
if idx < 0 {
idx = 0
}
i.SetSelectedIndex(idx)
return
}
// SelectPageDownOption Goes down 'menu height' options
func (i *Menu) SelectPageDownOption() {
idx := i.GetSelectedIndex()
idx += i.height
if idx >= len(i.options) {
idx = len(i.options) - 1
}
i.SetSelectedIndex(idx)
return
}
// SelectFirstOption Goes to the top
func (i *Menu) SelectFirstOption() {
i.SetSelectedIndex(0)
return
}
// SelectLastOption Goes to the bottom
func (i *Menu) SelectLastOption() {
i.SetSelectedIndex(len(i.options) - 1)
return
}
// SetOptionDisabled Disables the specified option
func (i *Menu) SetOptionDisabled(idx int) {
if len(i.options) > idx {
@ -271,6 +301,10 @@ func (i *Menu) HandleEvent(event termbox.Event) bool {
i.SelectPrevOption()
case termbox.KeyArrowDown:
i.SelectNextOption()
case termbox.KeyArrowLeft:
i.SelectPageUpOption()
case termbox.KeyArrowRight:
i.SelectPageDownOption()
}
if i.vimMode {
switch event.Ch {
@ -279,6 +313,11 @@ func (i *Menu) HandleEvent(event termbox.Event) bool {
case 'k':
i.SelectPrevOption()
}
if event.Key == termbox.KeyCtrlF {
i.SelectPageDownOption()
} else if event.Key == termbox.KeyCtrlB {
i.SelectPageUpOption()
}
}
if i.GetSelectedIndex() != currentIdx {
return true
@ -329,25 +368,26 @@ func (i *Menu) Draw() {
}
// Print the options
selIdx := i.GetSelectedIndex()
printOptions := i.options
startOpts := selIdx - (optionHeight / 2)
endOpts := selIdx + (optionHeight / 2)
for startOpts < 0 {
startOpts++
endOpts++
bldHeight := (optionHeight / 2)
startIdx := i.GetSelectedIndex()
endIdx := i.GetSelectedIndex()
for bldHeight > 0 && startIdx >= 1 {
startIdx--
bldHeight--
}
bldHeight += (optionHeight / 2)
for bldHeight > 0 && endIdx < len(i.options) {
endIdx++
bldHeight--
}
printOptions = printOptions[startOpts:]
for idx := range printOptions { //i.options {
for idx := startIdx; idx < endIdx; idx++ { //i.options {
if i.GetSelectedIndex()-idx >= optionHeight-1 {
// Skip this one
continue
}
currOpt := &printOptions[idx]
//currOpt := &i.options[idx]
currOpt := &i.options[idx]
outTxt := currOpt.GetText()
outTxt = strconv.Itoa(startOpts) + "/" + strconv.Itoa(selIdx) + "/" + strconv.Itoa(endOpts) + " - " + outTxt
if len(outTxt) >= i.width {
outTxt = outTxt[:i.width]
}