added menubar example
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Stefan Salewski
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125
README.adoc
125
README.adoc
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@ -811,6 +811,131 @@ these conversions are rare, and because gintro use no converters at all still, w
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an explicit proc.) The use of cstringArray as third parameter for proc setAccelsForAction()
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an explicit proc.) The use of cstringArray as third parameter for proc setAccelsForAction()
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is a bit ugly, we have to fix that later.
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is a bit ugly, we have to fix that later.
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== GMenu with GActions
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The following example shows how we can define GActions and bind them to Menus, Buttons
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and Keyboard shortcuts. Examples for stateless actions (quit), for toggle actions (spellcheck)
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and for statefull actions (text justify) are provided.
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Note that the following code is not a direct translation of an existing example, but
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a collections of informations from various sources, so
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it may contain bugs or not fully optimal code.
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[[menubar.nim]]
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[source, nim]
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.menubar.nim
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----
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# https://developer.gnome.org/glib/stable/glib-GVariant.html
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# https://developer.gnome.org/glib/stable/glib-GVariantType.html
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# https://wiki.gnome.org/HowDoI/GMenu
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# https://wiki.gnome.org/HowDoI/GAction
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# nim c menubar.nim
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import gintro/[gtk, glib, gobject, gio]
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from strutils import `%`, format
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# https://github.com/GNOME/glib/blob/master/gio/tests/gapplication-example-actions.c
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proc activateToggleAction(action: SimpleAction; parameter: Variant; app: Application) =
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app.hold # hold/release taken over from C example, there may be reasons...
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block:
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echo format("action $1 activated", action.name)
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let state: Variant = action.state
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let b = state.getBoolean
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action.state = newVariantBoolean(not b)
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echo format("state change $1 -> $2", b, not b)
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app.release
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proc activateStatefulAction(action: SimpleAction; parameter: Variant; app: Application) =
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app.hold
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block:
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echo format("action $1 activated", action.name)
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let state: Variant = action.state
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var l: uint64
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let oldState = state.getString(l) # yes uint64 parameter is a bit ugly
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let newState = parameter.getString(l)
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action.state = newVariantString(newState)
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echo format("state change $1 -> $2", oldState, newState)
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app.release
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proc quitProgram(action: SimpleAction; parameter: Variant; app: Application) =
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quit(app)
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proc appStartup(app: Application) =
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let quit = newSimpleAction("quit") # here we create the actions for whole app
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connect(quit, "activate", quitProgram, app)
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app.addAction(quit)
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let menu = gio.newMenu() # root of all menus
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block: # plain stateless menu
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let subMenu = gio.newMenu()
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menu.appendSubMenu("Application", submenu)
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# let section = gio.newMenu() # no separating section needed here
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# submenu.appendSection(nil, section)
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# section.append("Quit", "app.quit")
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submenu.append("Quit", "app.quit")
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block: #stateful menu with radio items
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let subMenu = gio.newMenu()
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menu.appendSubMenu("Layout", submenu)
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let subMenu2 = gio.newMenu()
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submenu.appendSubMenu("justify", submenu2)
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let section = gio.newMenu()
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submenu2.appendSection(nil, section)
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section.append("left", "win.justify::left")
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section.append("center", "win.justify::center")
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section.append("right", "win.justify::right")
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block: # and finally a toggle menu
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let subMenu = gio.newMenu()
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menu.appendSubMenu("Spelling", submenu)
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let section = gio.newMenu()
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submenu.appendSection(nil, section)
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section.append("Check", "win.toggleSpellCheck")
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# finally add the menubar
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setMenuBar(app, menu)
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proc appActivate(app: Application) =
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let window = newApplicationWindow(app)
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window.title = "GTK3 App with Menubar"
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window.defaultSize = (500, 200)
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window.position = WindowPosition.center
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block: # creat the window related actions
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let v = newVariantBoolean(true)
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let spellCheck = newSimpleActionStateful("toggleSpellCheck", nil, v)
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connect(spellCheck, "activate", activateToggleAction, app)
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window.actionMap.addAction(spellCheck)
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block:
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let v = newVariantString("left") # default value and
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let vt = newVariantType("s") # string (value type)
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let justifyAction = newSimpleActionStateful("justify", vt, v)
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connect(justifyAction, "activate", activateStatefulAction, app)
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window.actionMap.addAction(justifyAction)
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let button = newButton()
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button.label = "Justify Center"
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#window.add(button) # do not add it here already: (menubar:10010): Gtk-WARNING **:
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# 22:00:33.230: actionhelper: action win.justify can't be activated due to
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# parameter type mismatch (parameter type s, target type NULL)
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button.setDetailedActionName("win.justify::center")
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#button.setActionName("app.quit") # for a stateless action
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var h: cstringArray = allocCstringArray(["<Control><Shift>R"]) # ugly
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setAccelsForAction(app, "win.justify::right", h)
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deallocCStringArray(h)
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window.add(button)
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showAll(window)
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proc main =
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let app = newApplication("app.example")
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connect(app, "startup", appStartup)
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connect(app, "activate", appActivate)
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echo "GTK Version $1.$2.$3" % [$majorVersion(), $minorVersion(), $microVersion()]
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let status = run(app)
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quit(status)
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main()
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----
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== Drawing with Cairo graphics library
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== Drawing with Cairo graphics library
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The next example shows how we can use the cairo graphics library for drawing on a DrawingArea widget,
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The next example shows how we can use the cairo graphics library for drawing on a DrawingArea widget,
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105
examples/menubar.nim
Normal file
105
examples/menubar.nim
Normal file
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@ -0,0 +1,105 @@
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# https://developer.gnome.org/glib/stable/glib-GVariant.html
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# https://developer.gnome.org/glib/stable/glib-GVariantType.html
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# https://wiki.gnome.org/HowDoI/GMenu
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# https://wiki.gnome.org/HowDoI/GAction
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# nim c menubar.nim
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import gintro/[gtk, glib, gobject, gio]
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from strutils import `%`, format
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# https://github.com/GNOME/glib/blob/master/gio/tests/gapplication-example-actions.c
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proc activateToggleAction(action: SimpleAction; parameter: Variant; app: Application) =
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app.hold # hold/release taken over from C example, there may be reasons...
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block:
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echo format("action $1 activated", action.name)
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let state: Variant = action.state
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let b = state.getBoolean
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action.state = newVariantBoolean(not b)
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echo format("state change $1 -> $2", b, not b)
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app.release
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proc activateStatefulAction(action: SimpleAction; parameter: Variant; app: Application) =
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app.hold
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block:
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echo format("action $1 activated", action.name)
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let state: Variant = action.state
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var l: uint64
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let oldState = state.getString(l) # yes uint64 parameter is a bit ugly
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let newState = parameter.getString(l)
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action.state = newVariantString(newState)
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echo format("state change $1 -> $2", oldState, newState)
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app.release
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proc quitProgram(action: SimpleAction; parameter: Variant; app: Application) =
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quit(app)
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proc appStartup(app: Application) =
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let quit = newSimpleAction("quit") # here we create the actions for whole app
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connect(quit, "activate", quitProgram, app)
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app.addAction(quit)
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let menu = gio.newMenu() # root of all menus
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block: # plain stateless menu
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let subMenu = gio.newMenu()
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menu.appendSubMenu("Application", submenu)
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# let section = gio.newMenu() # no separating section needed here
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# submenu.appendSection(nil, section)
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# section.append("Quit", "app.quit")
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submenu.append("Quit", "app.quit")
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block: #stateful menu with radio items
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let subMenu = gio.newMenu()
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menu.appendSubMenu("Layout", submenu)
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let subMenu2 = gio.newMenu()
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submenu.appendSubMenu("justify", submenu2)
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let section = gio.newMenu()
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submenu2.appendSection(nil, section)
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section.append("left", "win.justify::left")
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section.append("center", "win.justify::center")
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section.append("right", "win.justify::right")
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block: # and finally a toggle menu
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let subMenu = gio.newMenu()
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menu.appendSubMenu("Spelling", submenu)
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let section = gio.newMenu()
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submenu.appendSection(nil, section)
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section.append("Check", "win.toggleSpellCheck")
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# finally add the menubar
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setMenuBar(app, menu)
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proc appActivate(app: Application) =
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let window = newApplicationWindow(app)
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window.title = "GTK3 App with Menubar"
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window.defaultSize = (500, 200)
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window.position = WindowPosition.center
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block: # creat the window related actions
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let v = newVariantBoolean(true)
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let spellCheck = newSimpleActionStateful("toggleSpellCheck", nil, v)
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connect(spellCheck, "activate", activateToggleAction, app)
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window.actionMap.addAction(spellCheck)
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block:
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let v = newVariantString("left") # default value and
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let vt = newVariantType("s") # string (value type)
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let justifyAction = newSimpleActionStateful("justify", vt, v)
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connect(justifyAction, "activate", activateStatefulAction, app)
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window.actionMap.addAction(justifyAction)
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let button = newButton()
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button.label = "Justify Center"
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#window.add(button) # do not add it here already: (menubar:10010): Gtk-WARNING **: 22:00:33.230: actionhelper:
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# action win.justify can't be activated due to parameter type mismatch (parameter type s, target type NULL)
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button.setDetailedActionName("win.justify::center")
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#button.setActionName("app.quit") # for a stateless action
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var h: cstringArray = allocCstringArray(["<Control><Shift>R"]) # ugly
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setAccelsForAction(app, "win.justify::right", h)
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deallocCStringArray(h)
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window.add(button)
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showAll(window)
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proc main =
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let app = newApplication("app.example")
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connect(app, "startup", appStartup)
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connect(app, "activate", appActivate)
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echo "GTK Version $1.$2.$3" % [$majorVersion(), $minorVersion(), $microVersion()]
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let status = run(app)
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quit(status)
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main()
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