import app_base
+# Platform variations
+import linux::ui is conditional(linux)
+import android::ui is conditional(android)
+import ios::ui is conditional(ios)
+
redef class App
super AppComponent
# The current `Window` of this activity
#
- # This attribute must be set by refinements of `App`.
- var window: Window is writable
+ # This attribute is set by `push_window`.
+ var window: Window is noinit
+
+ # Make visible and push `window` on the top of `pop_window`
+ #
+ # This method must be called at least once within `App::on_create`.
+ # It can be called at any times while the app is active.
+ fun push_window(window: Window)
+ do
+ window_stack.add window
+ self.window = window
+ end
+
+ # Pop the current `window` from the stack and show the previous one
+ #
+ # Require: `window_stack.not_empty`
+ fun pop_window
+ do
+ assert window_stack.not_empty
+ window_stack.pop
+ window = window_stack.last
+ window.on_resume
+ end
+
+ # Stack of active windows
+ var window_stack = new Array[Window]
redef fun on_create do window.on_create
class CompositeControl
super Control
- private var items = new HashSet[Control]
+ protected var items = new Array[Control]
# Add `item` as a child of `self`
protected fun add(item: Control) do items.add item
# Remove `item` from `self`
- protected fun remove(item: Control) do if has(item) then items.remove item
+ fun remove(item: Control) do if has(item) then items.remove item
# Is `item` in `self`?
- protected fun has(item: Control): Bool do return items.has(item)
+ fun has(item: Control): Bool do return items.has(item)
+
+ # Remove all items from `self`
+ fun clear do for item in items.to_a do remove item
redef fun on_create do for i in items do i.on_create
# A window, root of the `Control` tree
class Window
super CompositeControl
+
+ # Should the back button be shown and used to go back to a previous window?
+ fun enable_back_button: Bool do return app.window_stack.length > 1
+
+ # The back button has been pressed, usually to open the previous window
+ fun on_back_button do app.pop_window
end
# A viewable `Control`
# Is this control enabled so the user can interact with it?
#
# By default, or if set to `null`, the control is enabled.
- var enabled: nullable Bool is writable #, abstract FIXME with #1311
+ var enabled: nullable Bool is writable, abstract, autoinit
end
# A control with some `text`
# Main `Text` of this control
#
# By default, or if set to `null`, no text is shown.
- var text: nullable Text is writable #, abstract FIXME with #1311
+ var text: nullable Text is writable, abstract, autoinit
+
+ # Set the relative size of the text
+ #
+ # A value of 1.0, the default, use the platform default text size.
+ # Values under 1.0 set a smaller text size, and over 1.0 a larger size.
+ #
+ # Implementation varies per platform, and some controls may be unaffected
+ # depending on the customization options of each platform.
+ # For consistent results, it is recommended to use only on instances
+ # of `Label` and `size` should be either 0.5, 1.0 or 1.5.
+ fun size=(size: nullable Float) is autoinit do end
+
+ # Align the text horizontally
+ #
+ # Use 0.0 to align left (the default), 0.5 to align in the center and
+ # 1.0 to align on the right.
+ #
+ # Implementation varies per platform, and some controls may be unaffected
+ # depending on the customization options of each platform.
+ # For consistent results, it is recommended to use only on instances
+ # of `Label` and `size` should be either 0.0, 0.5 or 1.0.
+ fun align=(align: nullable Float) is autoinit do end
end
# A control for the user to enter custom `text`
class TextInput
super TextView
+
+ # Hide password or any content entered in this view?
+ var is_password: nullable Bool is writable
end
# A pushable button, raises `ButtonPressEvent`
super TextView
end
+# A text label
+class Label
+ super TextView
+end
+
+# Toggle control with two states and a label
+class CheckBox
+ super TextView
+
+ # Is this control in the checked/on state?
+ var is_checked = false is writable
+end
+
+# Event sent from a `VIEW`
+class ViewEvent
+ super AppEvent
+
+ # The `VIEW` that raised this event
+ var sender: VIEW
+
+ # Type of the `sender`
+ type VIEW: View
+end
+
# A `Button` press event
class ButtonPressEvent
- super AppEvent
+ super ViewEvent
+
+ redef type VIEW: Button
+end
- # The `Button` that raised this event
- var sender: Button
+# The `CheckBox` `sender` has been toggled
+class ToggleEvent
+ super ViewEvent
+
+ redef type VIEW: CheckBox
end
# A layout to visually organize `Control`s
class VerticalLayout
super Layout
end
+
+# Scrollable list of views in a simple list
+class ListLayout
+ super View
+ super CompositeControl
+end
nitlanguage / nit.git / blobdiff