/
menu_bar_item.go
167 lines (141 loc) · 3.67 KB
/
menu_bar_item.go
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package glfw
import (
"image/color"
"fyne.io/fyne"
"fyne.io/fyne/canvas"
"fyne.io/fyne/driver/desktop"
"fyne.io/fyne/internal/widget"
"fyne.io/fyne/theme"
publicWidget "fyne.io/fyne/widget"
)
var _ fyne.Widget = (*menuBarItem)(nil)
var _ desktop.Hoverable = (*menuBarItem)(nil)
// menuBarItem is a widget for displaying an item for a fyne.Menu in a MenuBar.
type menuBarItem struct {
widget.Base
Menu *fyne.Menu
Parent *MenuBar
child *publicWidget.Menu
hovered bool
}
func (i *menuBarItem) Child() *publicWidget.Menu {
if i.child == nil {
child := publicWidget.NewMenu(i.Menu)
child.Hide()
child.OnDismiss = i.Parent.deactivate
i.child = child
}
return i.child
}
// CreateRenderer returns a new renderer for the menu bar item.
//
// Implements: fyne.Widget
func (i *menuBarItem) CreateRenderer() fyne.WidgetRenderer {
text := canvas.NewText(i.Menu.Label, theme.TextColor())
objects := []fyne.CanvasObject{text}
return &menuBarItemRenderer{
widget.NewBaseRenderer(objects),
i,
text,
}
}
// Hide hides the menu bar item.
//
// Implements: fyne.Widget
func (i *menuBarItem) Hide() {
widget.HideWidget(&i.Base, i)
}
// MinSize returns the minimal size of the menu bar item.
//
// Implements: fyne.Widget
func (i *menuBarItem) MinSize() fyne.Size {
return widget.MinSizeOf(i)
}
// MouseIn changes the item to be hovered and shows the menu if the bar is active.
// The menu that was displayed before will be hidden.
//
// Implements: desktop.Hoverable
func (i *menuBarItem) MouseIn(_ *desktop.MouseEvent) {
if i.Parent.active {
i.hovered = true
i.Parent.activateChild(i)
i.Refresh()
} else {
i.hovered = true
i.Refresh()
}
}
// MouseMoved does nothing.
//
// Implements: desktop.Hoverable
func (i *menuBarItem) MouseMoved(_ *desktop.MouseEvent) {
}
// MouseOut changes the item to not be hovered but has no effect on the visibility of the menu.
//
// Implements: desktop.Hoverable
func (i *menuBarItem) MouseOut() {
i.hovered = false
i.Refresh()
}
// Move sets the position of the widget relative to its parent.
//
// Implements: fyne.Widget
func (i *menuBarItem) Move(pos fyne.Position) {
widget.MoveWidget(&i.Base, i, pos)
}
// Refresh triggers a redraw of the menu bar item.
//
// Implements: fyne.Widget
func (i *menuBarItem) Refresh() {
widget.RefreshWidget(i)
}
// Resize changes the size of the menu bar item.
//
// Implements: fyne.Widget
func (i *menuBarItem) Resize(size fyne.Size) {
widget.ResizeWidget(&i.Base, i, size)
}
// Show makes the menu bar item visible.
//
// Implements: fyne.Widget
func (i *menuBarItem) Show() {
widget.ShowWidget(&i.Base, i)
}
// Tapped toggles the activation state of the menu bar.
// It shows the item’s menu if the bar is activated and hides it if the bar is deactivated.
//
// Implements: fyne.Tappable
func (i *menuBarItem) Tapped(*fyne.PointEvent) {
if i.Parent.active {
i.Parent.deactivate()
} else {
i.Parent.activateChild(i)
}
}
type menuBarItemRenderer struct {
widget.BaseRenderer
i *menuBarItem
text *canvas.Text
}
func (r *menuBarItemRenderer) BackgroundColor() color.Color {
if r.i.hovered || (r.i.child != nil && r.i.child.Visible()) {
return theme.HoverColor()
}
return color.Transparent
}
func (r *menuBarItemRenderer) Layout(_ fyne.Size) {
padding := r.padding()
r.text.TextSize = theme.TextSize()
r.text.Color = theme.TextColor()
r.text.Resize(r.text.MinSize())
r.text.Move(fyne.NewPos(padding.Width/2, padding.Height/2))
}
func (r *menuBarItemRenderer) MinSize() fyne.Size {
return r.text.MinSize().Add(r.padding())
}
func (r *menuBarItemRenderer) Refresh() {
canvas.Refresh(r.i)
}
func (r *menuBarItemRenderer) padding() fyne.Size {
return fyne.NewSize(theme.Padding()*4, theme.Padding()*2)
}