mirror of
https://github.com/vsariola/sointu.git
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drafting
This commit is contained in:
5684185+vsariola@users.noreply.github.com
parent
f88986dc64
commit
02a9d9747f
@ -5,6 +5,7 @@ import (
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"image/color"
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"gioui.org/io/event"
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"gioui.org/io/key"
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"gioui.org/io/pointer"
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"gioui.org/layout"
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"gioui.org/op"
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@ -17,11 +18,16 @@ import (
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type (
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// MenuState is the part of the menu that needs to be retained between frames.
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MenuState struct {
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visible bool
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tags []bool
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hover int
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hoverOk bool
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list layout.List
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scrollBar ScrollBar
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tag bool
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visible bool
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itemTmp []menuItem
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}
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// MenuStyle is the style for a menu that is stored in the theme.yml.
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@ -34,139 +40,249 @@ type (
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Height unit.Dp
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}
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// ActionMenuItem is a menu item that has an icon, text, shortcut and an action.
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ActionMenuItem struct {
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Icon []byte
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Text string
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Shortcut string
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Action tracker.Action
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}
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// MenuWidget has a Layout method to display a menu
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MenuWidget struct {
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Theme *Theme
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State *MenuState
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Style *MenuStyle
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}
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// MenuButton displayes a button with text that opens a menu when clicked.
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MenuButton struct {
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Theme *Theme
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Title string
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Style *ButtonStyle
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Clickable *Clickable
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MenuState *MenuState
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Width unit.Dp
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}
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)
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func Menu(th *Theme, state *MenuState) MenuWidget {
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return MenuWidget{
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Theme: th,
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State: state,
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Style: &th.Menu.Main,
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func Menu(state *MenuState) MenuWidget { return MenuWidget{State: state} }
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func (w MenuWidget) WithStyle(style *MenuStyle) MenuWidget { w.Style = style; return w }
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func (ms *MenuState) Tags(level int, yield TagYieldFunc) bool {
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if ms.visible {
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return yield(level, &ms.tag)
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}
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return true
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}
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func MenuItem(act tracker.Action, text, shortcut string, icon []byte) ActionMenuItem {
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return ActionMenuItem{
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// MenuChild describes one or more menu items; if MenuChild is an Action or
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// Bool, it's one item per child, but Ints are treated as enumerations and
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// create one item per different possible values of the int.
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type MenuChild struct {
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Icon []byte
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Text string
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Shortcut string
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kind menuChildKind
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action tracker.Action
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bool tracker.Bool
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int tracker.Int
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widget layout.Widget // these should be passive separators and such
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}
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type menuChildKind int
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const (
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menuChildAction menuChildKind = iota
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menuChildBool
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menuChildInt
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menuChildList
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menuChildWidget
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)
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func ActionMenuChild(act tracker.Action, text, shortcut string, icon []byte) MenuChild {
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return MenuChild{
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Icon: icon,
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Text: text,
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Shortcut: shortcut,
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Action: act,
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kind: menuChildAction,
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action: act,
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}
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}
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func MenuBtn(th *Theme, ms *MenuState, cl *Clickable, title string) MenuButton {
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return MenuButton{
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Theme: th,
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Title: title,
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Clickable: cl,
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MenuState: ms,
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Style: &th.Button.Menu,
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func BoolMenuChild(b tracker.Bool, text, shortcut string, icon []byte) MenuChild {
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return MenuChild{
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Icon: icon,
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Text: text,
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Shortcut: shortcut,
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kind: menuChildBool,
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bool: b,
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}
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}
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func (m *MenuWidget) Layout(gtx C, items ...ActionMenuItem) D {
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func IntMenuChild(i tracker.Int, text, shortcut string, icon []byte) MenuChild {
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return MenuChild{
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Icon: icon,
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Text: text,
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Shortcut: shortcut,
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kind: menuChildInt,
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int: i,
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}
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}
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// Layout the menu with the given items
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func (m MenuWidget) Layout(gtx C, children ...MenuChild) D {
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t := TrackerFromContext(gtx)
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if m.Style == nil {
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m.Style = &t.Theme.Menu.Main
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}
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// unfortunately, there was no way to include items into the MenuWidget
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// without causing heap escapes, so they are passed as a parameter to the Layout
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m.update(gtx, items...)
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popup := Popup(m.Theme, &m.State.visible)
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popup.Style = &m.Theme.Popup.Menu
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return popup.Layout(gtx, func(gtx C) D {
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m.State.itemTmp = m.State.itemTmp[:0]
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for i, c := range children {
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switch c.kind {
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case menuChildAction:
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m.State.itemTmp = append(m.State.itemTmp, menuItem{childIndex: i, icon: c.Icon, text: c.Text, shortcut: c.Shortcut, enabled: c.enabled()})
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case menuChildBool:
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mi := menuItem{childIndex: i, text: c.Text, shortcut: c.Shortcut, enabled: c.enabled()}
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if c.bool.Value() {
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mi.icon = c.Icon
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}
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m.State.itemTmp = append(m.State.itemTmp, mi)
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case menuChildInt:
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for i := c.int.Range().Min; i <= c.int.Range().Max; i++ {
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mi := menuItem{childIndex: i, text: c.int.StringOf(i), value: i, enabled: c.enabled()}
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if c.int.Value() == i {
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mi.icon = c.Icon
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}
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if i == c.int.Range().Min {
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mi.shortcut = c.Shortcut
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}
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m.State.itemTmp = append(m.State.itemTmp, mi)
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}
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}
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}
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m.update(gtx, children, m.State.itemTmp)
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listItem := func(gtx C, i int) D {
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item := m.State.itemTmp[i]
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icon := t.Theme.Icon(item.icon)
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iconColor := m.Style.Text.Color
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iconInset := layout.Inset{Left: unit.Dp(12), Right: unit.Dp(6)}
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textLabel := Label(t.Theme, &m.Style.Text, item.text)
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shortcutLabel := Label(t.Theme, &m.Style.Shortcut, item.shortcut)
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if !item.enabled {
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iconColor = m.Style.Disabled
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textLabel.Color = m.Style.Disabled
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shortcutLabel.Color = m.Style.Disabled
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}
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shortcutInset := layout.Inset{Left: unit.Dp(12), Right: unit.Dp(12), Bottom: unit.Dp(2), Top: unit.Dp(2)}
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fg := func(gtx C) D {
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return layout.Flex{Axis: layout.Horizontal, Alignment: layout.Middle}.Layout(gtx,
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layout.Rigid(func(gtx C) D {
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return iconInset.Layout(gtx, func(gtx C) D {
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p := gtx.Dp(unit.Dp(m.Style.Text.TextSize))
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gtx.Constraints.Min = image.Pt(p, p)
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return icon.Layout(gtx, iconColor)
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})
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}),
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layout.Rigid(textLabel.Layout),
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layout.Flexed(1, func(gtx C) D { return D{Size: image.Pt(gtx.Constraints.Max.X, 1)} }),
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layout.Rigid(func(gtx C) D {
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return shortcutInset.Layout(gtx, shortcutLabel.Layout)
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}),
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)
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}
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bg := func(gtx C) D {
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rect := clip.Rect{Max: image.Pt(gtx.Constraints.Min.X, gtx.Constraints.Min.Y)}
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if item.enabled && m.State.hoverOk && m.State.hover == i {
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paint.FillShape(gtx.Ops, m.Style.Hover, rect.Op())
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}
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if item.enabled {
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area := rect.Push(gtx.Ops)
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event.Op(gtx.Ops, &m.State.tags[i])
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area.Pop()
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}
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return D{Size: rect.Max}
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}
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return layout.Background{}.Layout(gtx, bg, fg)
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}
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menuList := func(gtx C) D {
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gtx.Constraints.Max.X = gtx.Dp(m.Style.Width)
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gtx.Constraints.Max.Y = gtx.Dp(m.Style.Height)
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r := clip.Rect(image.Rect(0, 0, gtx.Constraints.Max.X, gtx.Constraints.Max.Y)).Push(gtx.Ops)
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event.Op(gtx.Ops, &m.State.tag)
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r.Pop()
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m.State.list.Axis = layout.Vertical
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m.State.scrollBar.Axis = layout.Vertical
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return layout.Stack{Alignment: layout.SE}.Layout(gtx,
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layout.Expanded(func(gtx C) D { return m.State.list.Layout(gtx, len(m.State.itemTmp), listItem) }),
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layout.Expanded(func(gtx C) D {
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return m.State.list.Layout(gtx, len(items), func(gtx C, i int) D {
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defer op.Offset(image.Point{}).Push(gtx.Ops).Pop()
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var macro op.MacroOp
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item := &items[i]
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if i == m.State.hover-1 && item.Action.Enabled() {
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macro = op.Record(gtx.Ops)
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}
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icon := m.Theme.Icon(item.Icon)
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iconColor := m.Style.Text.Color
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iconInset := layout.Inset{Left: unit.Dp(12), Right: unit.Dp(6)}
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textLabel := Label(m.Theme, &m.Style.Text, item.Text)
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shortcutLabel := Label(m.Theme, &m.Style.Shortcut, item.Shortcut)
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if !item.Action.Enabled() {
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iconColor = m.Style.Disabled
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textLabel.Color = m.Style.Disabled
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shortcutLabel.Color = m.Style.Disabled
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}
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shortcutInset := layout.Inset{Left: unit.Dp(12), Right: unit.Dp(12), Bottom: unit.Dp(2), Top: unit.Dp(2)}
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dims := layout.Flex{Axis: layout.Horizontal, Alignment: layout.Middle}.Layout(gtx,
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layout.Rigid(func(gtx C) D {
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return iconInset.Layout(gtx, func(gtx C) D {
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p := gtx.Dp(unit.Dp(m.Style.Text.TextSize))
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gtx.Constraints.Min = image.Pt(p, p)
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return icon.Layout(gtx, iconColor)
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})
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}),
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layout.Rigid(textLabel.Layout),
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layout.Flexed(1, func(gtx C) D { return D{Size: image.Pt(gtx.Constraints.Max.X, 1)} }),
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layout.Rigid(func(gtx C) D {
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return shortcutInset.Layout(gtx, shortcutLabel.Layout)
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}),
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)
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if i == m.State.hover-1 && item.Action.Enabled() {
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recording := macro.Stop()
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paint.FillShape(gtx.Ops, m.Style.Hover, clip.Rect{
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Max: image.Pt(dims.Size.X, dims.Size.Y),
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}.Op())
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recording.Add(gtx.Ops)
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}
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if item.Action.Enabled() {
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rect := image.Rect(0, 0, dims.Size.X, dims.Size.Y)
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area := clip.Rect(rect).Push(gtx.Ops)
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event.Op(gtx.Ops, &m.State.tags[i])
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area.Pop()
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}
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return dims
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})
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}),
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layout.Expanded(func(gtx C) D {
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return m.State.scrollBar.Layout(gtx, &m.Theme.ScrollBar, len(items), &m.State.list.Position)
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return m.State.scrollBar.Layout(gtx, &t.Theme.ScrollBar, len(m.State.itemTmp), &m.State.list.Position)
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}),
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)
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})
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}
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popup := Popup(t.Theme, &m.State.visible)
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popup.Style = &t.Theme.Popup.Menu
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return popup.Layout(gtx, menuList)
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}
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func (m *MenuWidget) update(gtx C, items ...ActionMenuItem) {
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for i, item := range items {
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type menuItem struct {
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childIndex int
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value int
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icon []byte
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text, shortcut string
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enabled bool
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}
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func (m *MenuWidget) update(gtx C, children []MenuChild, items []menuItem) {
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// handle keyboard events for the menu
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for {
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ev, ok := gtx.Event(
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key.FocusFilter{Target: &m.State.tag},
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key.Filter{Focus: &m.State.tag, Name: key.NameUpArrow},
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key.Filter{Focus: &m.State.tag, Name: key.NameDownArrow},
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key.Filter{Focus: &m.State.tag, Name: key.NameEnter},
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key.Filter{Focus: &m.State.tag, Name: key.NameReturn},
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)
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if !ok {
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break
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}
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switch e := ev.(type) {
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case key.Event:
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if e.State != key.Press {
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continue
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}
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switch e.Name {
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case key.NameUpArrow:
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if !m.State.hoverOk {
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m.State.hover = 0 // if nothing is selected, select the first item before starting to move backwards
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}
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for i := 1; i < len(items); i++ {
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idx := (m.State.hover - i + len(items)) % len(items)
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child := &children[items[idx].childIndex]
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if child.enabled() {
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m.State.hover = idx
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m.State.hoverOk = true
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break
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}
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}
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case key.NameDownArrow:
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if !m.State.hoverOk {
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m.State.hover = len(items) - 1 // if nothing is selected, select the last item before starting to move backwards
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}
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for i := 1; i < len(items); i++ {
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idx := (m.State.hover + i) % len(items)
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child := &children[items[idx].childIndex]
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if child.enabled() {
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m.State.hover = idx
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m.State.hoverOk = true
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break
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}
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}
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case key.NameEnter, key.NameReturn:
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if m.State.hoverOk && m.State.hover >= 0 && m.State.hover < len(items) {
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m.activateItem(items[m.State.hover], children)
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}
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}
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case key.FocusEvent:
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if !m.State.hoverOk {
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m.State.hover = 0
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}
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m.State.hoverOk = e.Focus
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}
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}
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for i := range items {
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// make sure we have a tag for every item
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for len(m.State.tags) <= i {
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m.State.tags = append(m.State.tags, false)
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}
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// handle pointer events for this item
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for {
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ev, ok := gtx.Event(pointer.Filter{
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Target: &m.State.tags[i],
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Kinds: pointer.Press | pointer.Enter | pointer.Leave,
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})
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ev, ok := gtx.Event(pointer.Filter{Target: &m.State.tags[i], Kinds: pointer.Press | pointer.Enter | pointer.Leave})
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if !ok {
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break
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}
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@ -176,27 +292,84 @@ func (m *MenuWidget) update(gtx C, items ...ActionMenuItem) {
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}
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switch e.Kind {
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case pointer.Press:
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item.Action.Do()
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m.State.visible = false
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m.activateItem(items[i], children)
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case pointer.Enter:
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m.State.hover = i + 1
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m.State.hover = i
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m.State.hoverOk = true
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if !gtx.Focused(&m.State.tag) {
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gtx.Execute(key.FocusCmd{Tag: &m.State.tag})
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}
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case pointer.Leave:
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if m.State.hover == i+1 {
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m.State.hover = 0
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if m.State.hover == i {
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m.State.hoverOk = false
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}
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}
|
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}
|
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}
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}
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|
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func (mb MenuButton) Layout(gtx C, items ...ActionMenuItem) D {
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func (m *MenuWidget) activateItem(item menuItem, children []MenuChild) {
|
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if item.childIndex < 0 || item.childIndex >= len(children) {
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return
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}
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child := &children[item.childIndex]
|
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if !child.enabled() {
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return
|
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}
|
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switch child.kind {
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case menuChildAction:
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child.action.Do()
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case menuChildBool:
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child.bool.Toggle()
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case menuChildInt:
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child.int.SetValue(item.value)
|
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}
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m.State.visible = false
|
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}
|
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|
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func (c *MenuChild) enabled() bool {
|
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switch c.kind {
|
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case menuChildAction:
|
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return c.action.Enabled()
|
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case menuChildBool:
|
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return c.bool.Enabled()
|
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case menuChildWidget:
|
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return false // the widget are passive separators and such
|
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default:
|
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return true
|
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}
|
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}
|
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|
||||
// MenuButton displays a button with text that opens a menu when clicked.
|
||||
type MenuButton struct {
|
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Title string
|
||||
Style *ButtonStyle
|
||||
Clickable *Clickable
|
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MenuState *MenuState
|
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Width unit.Dp
|
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}
|
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|
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func MenuBtn(ms *MenuState, cl *Clickable, title string) MenuButton {
|
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return MenuButton{MenuState: ms, Clickable: cl, Title: title}
|
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}
|
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|
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func (mb MenuButton) WithStyle(style *ButtonStyle) MenuButton { mb.Style = style; return mb }
|
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|
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func (mb MenuButton) Layout(gtx C, children ...MenuChild) D {
|
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for mb.Clickable.Clicked(gtx) {
|
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mb.MenuState.visible = true
|
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gtx.Execute(key.FocusCmd{Tag: &mb.MenuState.tag})
|
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}
|
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btn := Btn(mb.Theme, mb.Style, mb.Clickable, mb.Title, "")
|
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t := TrackerFromContext(gtx)
|
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if mb.Style == nil {
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mb.Style = &t.Theme.Button.Menu
|
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}
|
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btn := Btn(t.Theme, mb.Style, mb.Clickable, mb.Title, "")
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dims := btn.Layout(gtx)
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defer op.Offset(image.Pt(0, dims.Size.Y)).Push(gtx.Ops).Pop()
|
||||
m := Menu(mb.Theme, mb.MenuState)
|
||||
m.Layout(gtx, items...)
|
||||
if mb.MenuState.visible {
|
||||
defer op.Offset(image.Pt(0, dims.Size.Y)).Push(gtx.Ops).Pop()
|
||||
m := Menu(mb.MenuState)
|
||||
m.Layout(gtx, children...)
|
||||
}
|
||||
return dims
|
||||
}
|
||||
|
||||
Reference in New Issue
Block a user