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@ -22,10 +22,19 @@ type DropDown struct {
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// The options from which the user can choose.
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options []*dropDownOption
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// Strings to be placed before and after each drop-down option.
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optionPrefix, optionSuffix string
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// The index of the currently selected option. Negative if no option is
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// currently selected.
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currentOption int
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// Strings to be placed beefore and after the current option.
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currentOptionPrefix, currentOptionSuffix string
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// The text to be displayed when no option has yet been selected.
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noSelection string
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// Set to true if the options are visible and selectable.
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open bool
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@ -78,6 +87,7 @@ func NewDropDown() *DropDown {
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list.SetMainTextColor(Styles.PrimitiveBackgroundColor).
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SetSelectedTextColor(Styles.PrimitiveBackgroundColor).
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SetSelectedBackgroundColor(Styles.PrimaryTextColor).
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SetHighlightFullLine(true).
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SetBackgroundColor(Styles.MoreContrastBackgroundColor)
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d := &DropDown{
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@ -128,6 +138,23 @@ func (d *DropDown) GetCurrentOption() (int, string) {
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return d.currentOption, text
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}
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// SetTextOptions sets the text to be placed before and after each drop-down
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// option (prefix/suffix), the text placed before and after the currently
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// selected option (currentPrefix/currentSuffix) as well as the text to be
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// displayed when no option is currently selected. Per default, all of these
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// strings are empty.
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func (d *DropDown) SetTextOptions(prefix, suffix, currentPrefix, currentSuffix, noSelection string) *DropDown {
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d.currentOptionPrefix = currentPrefix
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d.currentOptionSuffix = currentSuffix
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d.noSelection = noSelection
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d.optionPrefix = prefix
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d.optionSuffix = suffix
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for index := 0; index < d.list.GetItemCount(); index++ {
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d.list.SetItemText(index, prefix+d.options[index].Text+suffix, "")
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}
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return d
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}
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// SetLabel sets the text to be displayed before the input area.
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func (d *DropDown) SetLabel(label string) *DropDown {
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d.label = label
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@ -208,7 +235,7 @@ func (d *DropDown) GetFieldWidth() int {
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// callback is called when this option was selected. It may be nil.
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func (d *DropDown) AddOption(text string, selected func()) *DropDown {
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d.options = append(d.options, &dropDownOption{Text: text, Selected: selected})
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d.list.AddItem(text, "", 0, nil)
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d.list.AddItem(d.optionPrefix+text+d.optionSuffix, "", 0, nil)
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return d
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}
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@ -282,8 +309,9 @@ func (d *DropDown) Draw(screen tcell.Screen) {
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// What's the longest option text?
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maxWidth := 0
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optionWrapWidth := TaggedStringWidth(d.optionPrefix + d.optionSuffix)
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for _, option := range d.options {
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strWidth := TaggedStringWidth(option.Text)
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strWidth := TaggedStringWidth(option.Text) + optionWrapWidth
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if strWidth > maxWidth {
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maxWidth = strWidth
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}
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@ -293,6 +321,17 @@ func (d *DropDown) Draw(screen tcell.Screen) {
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fieldWidth := d.fieldWidth
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if fieldWidth == 0 {
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fieldWidth = maxWidth
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if d.currentOption < 0 {
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noSelectionWidth := TaggedStringWidth(d.noSelection)
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if noSelectionWidth > fieldWidth {
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fieldWidth = noSelectionWidth
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}
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} else if d.currentOption < len(d.options) {
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currentOptionWidth := TaggedStringWidth(d.currentOptionPrefix + d.options[d.currentOption].Text + d.currentOptionSuffix)
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if currentOptionWidth > fieldWidth {
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fieldWidth = currentOptionWidth
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}
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}
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}
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if rightLimit-x < fieldWidth {
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fieldWidth = rightLimit - x
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@ -308,21 +347,25 @@ func (d *DropDown) Draw(screen tcell.Screen) {
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// Draw selected text.
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if d.open && len(d.prefix) > 0 {
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// Show the prefix.
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Print(screen, d.prefix, x, y, fieldWidth, AlignLeft, d.prefixTextColor)
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currentOptionPrefixWidth := TaggedStringWidth(d.currentOptionPrefix)
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prefixWidth := stringWidth(d.prefix)
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listItemText := d.options[d.list.GetCurrentItem()].Text
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if prefixWidth < fieldWidth && len(d.prefix) < len(listItemText) {
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Print(screen, listItemText[len(d.prefix):], x+prefixWidth, y, fieldWidth-prefixWidth, AlignLeft, d.fieldTextColor)
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Print(screen, d.currentOptionPrefix, x, y, fieldWidth, AlignLeft, d.fieldTextColor)
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Print(screen, d.prefix, x+currentOptionPrefixWidth, y, fieldWidth-currentOptionPrefixWidth, AlignLeft, d.prefixTextColor)
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if len(d.prefix) < len(listItemText) {
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Print(screen, listItemText[len(d.prefix):]+d.currentOptionSuffix, x+prefixWidth+currentOptionPrefixWidth, y, fieldWidth-prefixWidth-currentOptionPrefixWidth, AlignLeft, d.fieldTextColor)
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}
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} else {
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color := d.fieldTextColor
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text := d.noSelection
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if d.currentOption >= 0 && d.currentOption < len(d.options) {
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color := d.fieldTextColor
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// Just show the current selection.
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if d.GetFocusable().HasFocus() && !d.open {
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color = d.fieldBackgroundColor
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}
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Print(screen, d.options[d.currentOption].Text, x, y, fieldWidth, AlignLeft, color)
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text = d.currentOptionPrefix + d.options[d.currentOption].Text + d.currentOptionSuffix
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}
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// Just show the current selection.
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if d.GetFocusable().HasFocus() && !d.open {
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color = d.fieldBackgroundColor
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}
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Print(screen, text, x, y, fieldWidth, AlignLeft, color)
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}
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// Draw options list.
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