120 lines
2.9 KiB
Go
120 lines
2.9 KiB
Go
package widgets
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import (
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"log"
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"supersonic/ui/layouts"
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"fyne.io/fyne/v2"
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"fyne.io/fyne/v2/canvas"
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"fyne.io/fyne/v2/container"
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"fyne.io/fyne/v2/theme"
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"fyne.io/fyne/v2/widget"
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)
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type ListColumn struct {
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Text string
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AlignTrailing bool
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CanToggleVisible bool
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}
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type ListHeader struct {
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widget.BaseWidget
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OnColumnVisibilityChanged func(int, bool)
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OnColumnVisibilityMenuShown func(*widget.PopUp)
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columns []ListColumn
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columnVisible []bool
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columnsLayout *layouts.ColumnsLayout
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columnsContainer *fyne.Container
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container *fyne.Container
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popUpMenu *fyne.Container
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}
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func NewListHeader(cols []ListColumn, layout *layouts.ColumnsLayout) *ListHeader {
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l := &ListHeader{
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columns: cols,
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columnsLayout: layout,
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columnsContainer: container.New(layout),
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}
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l.columnVisible = make([]bool, len(cols))
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for i, _ := range l.columnVisible {
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l.columnVisible[i] = true
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}
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l.container = container.NewMax(canvas.NewRectangle(theme.BackgroundColor()), l.columnsContainer)
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l.ExtendBaseWidget(l)
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l.buildColumns()
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return l
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}
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func (l *ListHeader) SetColumnVisible(colNum int, visible bool) {
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if colNum >= len(l.columns) {
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log.Println("error: ListHeader.SetColumnVisible: column index out of range")
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return
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}
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if visible {
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l.columnsContainer.Objects[colNum].Show()
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} else {
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l.columnsContainer.Objects[colNum].Hide()
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}
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l.columnVisible[colNum] = visible
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}
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func (l *ListHeader) buildColumns() {
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for _, c := range l.columns {
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t := widget.NewRichTextWithText(c.Text)
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t.Segments[0].(*widget.TextSegment).Style.TextStyle.Bold = true
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al := fyne.TextAlignLeading
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if c.AlignTrailing {
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al = fyne.TextAlignTrailing
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}
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t.Segments[0].(*widget.TextSegment).Style.Alignment = al
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l.columnsContainer.Add(t)
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}
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}
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func (l *ListHeader) CreateRenderer() fyne.WidgetRenderer {
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return widget.NewSimpleRenderer(l.container)
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}
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func (l *ListHeader) TappedSecondary(e *fyne.PointEvent) {
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l.setupPopUpMenu()
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if len(l.popUpMenu.Objects) == 0 {
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return
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}
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pop := widget.NewPopUp(l.popUpMenu, fyne.CurrentApp().Driver().CanvasForObject(l))
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pop.ShowAtPosition(e.AbsolutePosition)
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if l.OnColumnVisibilityMenuShown != nil {
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l.OnColumnVisibilityMenuShown(pop)
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}
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}
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func (l *ListHeader) setupPopUpMenu() {
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if l.popUpMenu == nil {
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l.popUpMenu = container.New(&layouts.VboxCustomPadding{ExtraPad: -10})
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for i, c := range l.columns {
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if c.CanToggleVisible {
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l.popUpMenu.Add(widget.NewCheck(c.Text, l.createOnChangedCallbk(i)))
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}
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}
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}
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objIdx := 0
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for i, col := range l.columns {
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if col.CanToggleVisible {
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l.popUpMenu.Objects[objIdx].(*widget.Check).Checked = l.columnVisible[i]
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objIdx++
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}
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}
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}
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func (l *ListHeader) createOnChangedCallbk(colNum int) func(bool) {
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return func(val bool) {
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l.columnVisible[colNum] = val
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l.SetColumnVisible(colNum, val)
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if l.OnColumnVisibilityChanged != nil {
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l.OnColumnVisibilityChanged(colNum, val)
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}
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}
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}
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