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// 12 december 2015
package ui
import (
"unsafe"
)
// #include "ui.h"
import "C"
// Tab is a Control that holds tabbed pages of Controls. Each tab
// has a label. The user can click on the tabs themselves to switch
// pages. Individual pages can also have margins.
type Tab struct {
ControlBase
t *C.uiTab
children []Control
}
// NewTab creates a new Tab.
func NewTab() *Tab {
t := new(Tab)
t.t = C.uiNewTab()
t.ControlBase = NewControlBase(t, uintptr(unsafe.Pointer(t.t)))
return t
}
// Destroy destroys the Tab. If the Tab has pages,
// Destroy calls Destroy on the pages's Controls as well.
func (t *Tab) Destroy() {
for len(t.children) != 0 {
c := t.children[0]
t.Delete(0)
c.Destroy()
}
t.ControlBase.Destroy()
}
// Append adds the given page to the end of the Tab.
func (t *Tab) Append(name string, child Control) {
t.InsertAt(name, len(t.children), child)
}
// InsertAt adds the given page to the Tab such that it is the
// nth page of the Tab (starting at 0).
func (t *Tab) InsertAt(name string, n int, child Control) {
c := (*C.uiControl)(nil)
if child != nil {
c = touiControl(child.LibuiControl())
}
cname := C.CString(name)
C.uiTabInsertAt(t.t, cname, C.int(n), c)
freestr(cname)
ch := make([]Control, len(t.children) + 1)
// and insert into t.children at the right place
copy(ch[:n], t.children[:n])
ch[n] = child
copy(ch[n + 1:], t.children[n:])
t.children = ch
}
// Delete deletes the nth page of the Tab.
func (t *Tab) Delete(n int) {
t.children = append(t.children[:n], t.children[n + 1:]...)
C.uiTabDelete(t.t, C.uintmax_t(n))
}
// NumPages returns the number of pages in the Tab.
func (t *Tab) NumPages() int {
return len(t.children)
}
// Margined returns whether page n (starting at 0) of the Tab
// has margins around its child.
func (t *Tab) Margined(n int) bool {
return tobool(C.uiTabMargined(t.t, C.uintmax_t(n)))
}
// SetMargined controls whether page n (starting at 0) of the Tab
// has margins around its child. The size of the margins are
// determined by the OS and its best practices.
func (t *Tab) SetMargined(n int, margined bool) {
C.uiTabSetMargined(t.t, C.uintmax_t(n), frombool(margined))
}
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