Noah Petherbridge
07cefb6499
* New and completed widgets: Menu, MenuButton and MenuBar.
* MenuButton is a kind of Button that opens a popup Menu when clicked.
* MenuBar is a container of buttons designed to be attached to the top
of an application window ("File, Edit, View, Help")
* Supervisor manages the popup menus with its new concept of a Modal
Widget. Modal widgets take exclusive event priority for all mouse and
key events. The pop-up menu is a modal window, which means you must
click an option inside the menu OR clicking outside the menu will
close it and eat your click event (widgets outside the modal don't
receive events, but the modal itself gets an event that you've done
this).
84 lines
2.3 KiB
Go
84 lines
2.3 KiB
Go
package ui_test
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import (
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"git.kirsle.net/go/ui"
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)
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// Example of using the menu widgets.
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func ExampleMenu() {
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mw, err := ui.NewMainWindow("Menu Bar Example", 800, 600)
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if err != nil {
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panic(err)
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}
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// Create a main menu for your window.
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menu := ui.NewMenuBar("Main Menu")
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// File menu. Some items with accelerators, some without.
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// NOTE: key bindings are up to you, the accelerators are
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// purely decorative.
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file := menu.AddMenu("File")
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file.AddItemAccel("New", "Ctrl-N", func() {})
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file.AddItemAccel("Open", "Ctrl-O", func() {})
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file.AddItemAccel("Save", "Ctrl-S", func() {})
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file.AddItem("Save as...", func() {})
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file.AddSeparator()
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file.AddItem("Close window", func() {})
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file.AddItemAccel("Exit", "Alt-F4", func() {})
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// Help menu.
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help := menu.AddMenu("Help")
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help.AddItemAccel("Contents", "F1", func() {})
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help.AddItem("About", func() {})
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// Give the menu bar your Supervisor so it can wire all
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// events up and make the menus work.
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menu.Supervise(mw.Supervisor())
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// Compute and pack the menu bar against the top of
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// the main window (or other parent container)
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menu.Compute(mw.Engine)
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mw.Pack(menu, menu.PackTop()) // Side: N, FillX: true
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// Each loop you must then:
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// - Call Supervisor.Loop() as normal to handle events.
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// - Call Supervisor.Present() to draw the modal popup menus.
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// MainLoop() of the MainWindow does this for you.
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mw.MainLoop()
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}
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// Example of using the MenuButton.
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func ExampleMenuButton() {
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mw, err := ui.NewMainWindow("Menu Button", 800, 600)
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if err != nil {
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panic(err)
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}
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// Create a MenuButton much as you would a normal Button.
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btn := ui.NewMenuButton("Button1", ui.NewLabel(ui.Label{
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Text: "File",
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}))
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mw.Place(btn, ui.Place{ // place it in the center
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Center: true,
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Middle: true,
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})
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// Add menu items to it.
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btn.AddItemAccel("New", "Ctrl-N", func() {})
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btn.AddItemAccel("Open", "Ctrl-O", func() {})
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btn.AddItemAccel("Save", "Ctrl-S", func() {})
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btn.AddItem("Save as...", func() {})
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btn.AddSeparator()
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btn.AddItem("Close window", func() {})
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btn.AddItemAccel("Exit", "Alt-F4", func() {})
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// Add the button to Supervisor for events to work.
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btn.Supervise(mw.Supervisor())
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// Each loop you must then:
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// - Call Supervisor.Loop() as normal to handle events.
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// - Call Supervisor.Present() to draw the modal popup menus.
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// MainLoop() of the MainWindow does this for you.
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mw.MainLoop()
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}
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