144 lines
4.0 KiB
Go
144 lines
4.0 KiB
Go
package ui
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import (
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"strings"
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"github.com/gdamore/tcell/v2"
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)
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// A FileSelectorDialog is a WindowContainer with an input and buttons for selecting files.
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// It can be used to open zero or more existing files, or select one non-existant file (for saving).
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type FileSelectorDialog struct {
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MustExist bool // Whether the dialog should have a user select an existing file.
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FilesChosenCallback func([]string) // Returns slice of filenames selected. nil if user canceled.
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Theme *Theme
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title string
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x, y int
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width, height int
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focused bool
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tabOrder []Component
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tabOrderIdx int
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inputField *InputField
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confirmButton *Button
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cancelButton *Button
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}
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func NewFileSelectorDialog(screen *tcell.Screen, title string, mustExist bool, theme *Theme, filesChosenCallback func([]string), cancelCallback func()) *FileSelectorDialog {
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dialog := &FileSelectorDialog{
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MustExist: mustExist,
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FilesChosenCallback: filesChosenCallback,
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Theme: theme,
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title: title,
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}
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dialog.inputField = NewInputField(screen, []byte{}, theme.GetOrDefault("Window")) // Use window's theme for InputField
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dialog.confirmButton = NewButton("Confirm", theme, dialog.onConfirm)
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dialog.cancelButton = NewButton("Cancel", theme, cancelCallback)
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dialog.tabOrder = []Component{dialog.inputField, dialog.cancelButton, dialog.confirmButton}
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return dialog
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}
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// onConfirm is a callback called by the confirm button.
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func (d *FileSelectorDialog) onConfirm() {
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if d.FilesChosenCallback != nil {
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files := strings.Split(string(d.inputField.Buffer), ",") // Split input by commas
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for i := range files {
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files[i] = strings.TrimSpace(files[i]) // Trim all strings in slice
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}
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d.FilesChosenCallback(files)
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}
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}
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func (d *FileSelectorDialog) SetCancelCallback(callback func()) {
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d.cancelButton.Callback = callback
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}
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func (d *FileSelectorDialog) SetTitle(title string) {
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d.title = title
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}
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func (d *FileSelectorDialog) Draw(s tcell.Screen) {
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DrawWindow(s, d.x, d.y, d.width, d.height, d.title, d.Theme)
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// Update positions of child components (dependent on size information that may not be available at SetPos() )
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btnWidth, _ := d.confirmButton.GetSize()
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d.confirmButton.SetPos(d.x+d.width-btnWidth-1, d.y+4) // Place "Ok" button on right, bottom
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d.inputField.Draw(s)
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d.confirmButton.Draw(s)
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d.cancelButton.Draw(s)
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}
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func (d *FileSelectorDialog) SetFocused(v bool) {
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d.focused = v
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d.tabOrder[d.tabOrderIdx].SetFocused(v)
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}
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func (d *FileSelectorDialog) SetTheme(theme *Theme) {
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d.Theme = theme
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d.inputField.SetStyle(theme.GetOrDefault("Window"))
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d.confirmButton.SetTheme(theme)
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d.cancelButton.SetTheme(theme)
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}
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func (d *FileSelectorDialog) GetPos() (int, int) {
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return d.x, d.y
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}
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func (d *FileSelectorDialog) SetPos(x, y int) {
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d.x, d.y = x, y
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d.inputField.SetPos(d.x+1, d.y+2) // Center input field
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d.cancelButton.SetPos(d.x+1, d.y+4) // Place "Cancel" button on left, bottom
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}
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func (d *FileSelectorDialog) GetMinSize() (int, int) {
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return Max(len(d.title), 8) + 2, 6
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}
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func (d *FileSelectorDialog) GetSize() (int, int) {
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return d.width, d.height
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}
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func (d *FileSelectorDialog) SetSize(width, height int) {
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minX, minY := d.GetMinSize()
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d.width, d.height = Max(width, minX), Max(height, minY)
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d.inputField.SetSize(d.width-2, 1)
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d.cancelButton.SetSize(d.cancelButton.GetMinSize())
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d.confirmButton.SetSize(d.confirmButton.GetMinSize())
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}
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func (d *FileSelectorDialog) HandleEvent(event tcell.Event) bool {
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switch ev := event.(type) {
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case *tcell.EventKey:
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switch ev.Key() {
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case tcell.KeyTab:
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d.tabOrder[d.tabOrderIdx].SetFocused(false)
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d.tabOrderIdx++
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if d.tabOrderIdx >= len(d.tabOrder) {
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d.tabOrderIdx = 0
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}
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d.tabOrder[d.tabOrderIdx].SetFocused(true)
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return true
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case tcell.KeyEsc:
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if d.cancelButton.Callback != nil {
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d.cancelButton.Callback()
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}
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return true
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case tcell.KeyEnter:
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if d.tabOrder[d.tabOrderIdx] == d.inputField {
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d.onConfirm()
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return true
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}
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}
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}
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return d.tabOrder[d.tabOrderIdx].HandleEvent(event)
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}
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