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// 12 december 2015
package ui
import (
"unsafe"
)
// #include "ui.h"
import "C"
// Group is a Control that holds another Control and wraps it around
// a labelled box (though some systems make this box invisible).
// You can use this to group related controls together.
type Group struct {
c *C.uiControl
g *C.uiGroup
child Control
}
// NewGroup creates a new Group.
func NewGroup(title string) *Group {
g := new(Group)
ctitle := C.CString(title)
g.g = C.uiNewGroup(ctitle)
g.c = (*C.uiControl)(unsafe.Pointer(g.g))
freestr(ctitle)
return g
}
// Destroy destroys the Group. If the Group has a child,
// Destroy calls Destroy on that as well.
func (g *Group) Destroy() {
if g.child != nil {
c := g.child
g.SetChild(nil)
c.Destroy()
}
C.uiControlDestroy(g.c)
}
// LibuiControl returns the libui uiControl pointer that backs
// the Group. This is only used by package ui itself and should
// not be called by programs.
func (g *Group) LibuiControl() uintptr {
return uintptr(unsafe.Pointer(g.c))
}
// Handle returns the OS-level handle associated with this Group.
// On Windows this is an HWND of a standard Windows API BUTTON
// class (as provided by Common Controls version 6).
// On GTK+ this is a pointer to a GtkFrame.
// On OS X this is a pointer to a NSBox.
func (g *Group) Handle() uintptr {
return uintptr(C.uiControlHandle(g.c))
}
// Show shows the Group.
func (g *Group) Show() {
C.uiControlShow(g.c)
}
// Hide hides the Group.
func (g *Group) Hide() {
C.uiControlHide(g.c)
}
// Enable enables the Group.
func (g *Group) Enable() {
C.uiControlEnable(g.c)
}
// Disable disables the Group.
func (g *Group) Disable() {
C.uiControlDisable(g.c)
}
// Title returns the Group's title.
func (g *Group) Title() string {
ctitle := C.uiGroupTitle(g.g)
title := C.GoString(ctitle)
C.uiFreeText(ctitle)
return title
}
// SetTitle sets the Group's title to title.
func (g *Group) SetTitle(title string) {
ctitle := C.CString(title)
C.uiGroupSetTitle(g.g, ctitle)
freestr(ctitle)
}
// SetChild sets the Group's child to child. If child is nil, the Group
// will not have a child.
func (g *Group) SetChild(child Control) {
g.child = child
c := (*C.uiControl)(nil)
if g.child != nil {
c = touiControl(g.child.LibuiControl())
}
C.uiGroupSetChild(g.g, c)
}
// Margined returns whether the Group has margins around its child.
func (g *Group) Margined() bool {
return tobool(C.uiGroupMargined(g.g))
}
// SetMargined controls whether the Group has margins around its
// child. The size of the margins are determined by the OS and its
// best practices.
func (g *Group) SetMargined(margined bool) {
C.uiGroupSetMargined(g.g, frombool(margined))
}
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