Noah Petherbridge
7d9ba79cd2
* Adds Window Manager support to the Supervisor, so that Window widgets can be dragged by their title bar, clicked to focus, etc. * Create a ui.Window as normal, but instead of Packing or Placing it into a parent container as before, you call .Supervise() and give it your Supervisor. The window registers itself to be managed and drawn by the Supervisor itself. * Supervisor manages the focused window order using a doubly linked list. When a window takes focus it moves to the top of the list. Widgets in the active window take event priority. * Extended DragDrop API to support holding a widget pointer in the drag operation. * Changed widget event Handle functions to return an error: so that they could return ErrStopPropagation to prevent events going to more widgets once handled (for important events). Some bugs remain around overlapping windows and event propagation.
64 lines
1.5 KiB
Go
64 lines
1.5 KiB
Go
package ui
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// Checkbox combines a CheckButton with a widget like a Label.
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type Checkbox struct {
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Frame
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button *CheckButton
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child Widget
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}
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// NewCheckbox creates a new Checkbox.
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func NewCheckbox(name string, boolVar *bool, child Widget) *Checkbox {
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return makeCheckbox(name, boolVar, nil, "", child)
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}
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// NewRadiobox creates a new Checkbox in radio mode.
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func NewRadiobox(name string, stringVar *string, value string, child Widget) *Checkbox {
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return makeCheckbox(name, nil, stringVar, value, child)
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}
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// makeCheckbox constructs an appropriate type of checkbox.
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func makeCheckbox(name string, boolVar *bool, stringVar *string, value string, child Widget) *Checkbox {
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// Our custom checkbutton widget.
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mark := NewFrame(name + "_mark")
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w := &Checkbox{
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child: child,
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}
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if boolVar != nil {
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w.button = NewCheckButton(name+"_button", boolVar, mark)
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} else if stringVar != nil {
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w.button = NewRadioButton(name+"_button", stringVar, value, mark)
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}
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w.Frame.Setup()
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// Forward clicks on the child widget to the CheckButton.
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for _, e := range []Event{MouseOver, MouseOut, MouseUp, MouseDown} {
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func(e Event) {
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w.child.Handle(e, func(ed EventData) error {
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return w.button.Event(e, ed)
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})
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}(e)
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}
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w.Pack(w.button, Pack{
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Side: W,
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})
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w.Pack(w.child, Pack{
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Side: W,
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})
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return w
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}
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// Child returns the child widget.
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func (w *Checkbox) Child() Widget {
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return w.child
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}
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// Supervise the checkbutton inside the widget.
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func (w *Checkbox) Supervise(s *Supervisor) {
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s.Add(w.button)
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s.Add(w.child)
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}
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