128 lines
3.1 KiB
Go
128 lines
3.1 KiB
Go
// 12 december 2015
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package ui
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import (
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"unsafe"
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)
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// #include "ui.h"
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import "C"
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// Tab is a Control that holds tabbed pages of Controls. Each tab
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// has a label. The user can click on the tabs themselves to switch
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// pages. Individual pages can also have margins.
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type Tab struct {
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c *C.uiControl
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t *C.uiTab
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children []Control
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}
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// NewTab creates a new Tab.
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func NewTab() *Tab {
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t := new(Tab)
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t.t = C.uiNewTab()
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t.c = (*C.uiControl)(unsafe.Pointer(t.t))
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return t
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}
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// Destroy destroys the Tab. If the Tab has pages,
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// Destroy calls Destroy on the pages's Controls as well.
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func (t *Tab) Destroy() {
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for len(t.children) != 0 {
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c := t.children[0]
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t.Delete(0)
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c.Destroy()
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}
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C.uiControlDestroy(t.c)
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}
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// LibuiControl returns the libui uiControl pointer that backs
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// the Tab. This is only used by package ui itself and should
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// not be called by programs.
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func (t *Tab) LibuiControl() uintptr {
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return uintptr(unsafe.Pointer(t.c))
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}
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// Handle returns the OS-level handle associated with this Tab.
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// On Windows this is an HWND of a standard Windows API
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// WC_TABCONTROL class (as provided by Common Controls
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// version 6). The pages are not children of this window and there
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// currently is no way to directly access them.
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// On GTK+ this is a pointer to a GtkNotebook.
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// On OS X this is a pointer to a NSTabView.
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func (t *Tab) Handle() uintptr {
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return uintptr(C.uiControlHandle(t.c))
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}
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// Show shows the Tab.
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func (t *Tab) Show() {
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C.uiControlShow(t.c)
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}
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// Hide hides the Tab.
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func (t *Tab) Hide() {
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C.uiControlHide(t.c)
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}
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// Enable enables the Tab.
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func (t *Tab) Enable() {
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C.uiControlEnable(t.c)
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}
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// Disable disables the Tab.
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func (t *Tab) Disable() {
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C.uiControlDisable(t.c)
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}
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// Append adds the given page to the end of the Tab.
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func (t *Tab) Append(name string, child Control) {
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t.InsertAt(name, len(t.children), child)
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}
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// InsertAt adds the given page to the Tab such that it is the
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// nth page of the Tab (starting at 0).
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func (t *Tab) InsertAt(name string, n int, child Control) {
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c := (*C.uiControl)(nil)
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if child != nil {
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c = touiControl(child.LibuiControl())
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}
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cname := C.CString(name)
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// TODO why is this uintmax_t and not intmax_t
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C.uiTabInsertAt(t.t, cname, C.uintmax_t(n), c)
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freestr(cname)
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ch := make([]Control, len(t.children) + 1)
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// and insert into t.children at the right place
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copy(ch[:n], t.children[:n])
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ch[n] = child
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copy(ch[n + 1:], t.children[n:])
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t.children = ch
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}
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// Delete deletes the nth page of the Tab.
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func (t *Tab) Delete(n int) {
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t.children = append(t.children[:n], t.children[n + 1:]...)
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C.uiTabDelete(t.t, C.uintmax_t(n))
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}
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// NumPages returns the number of pages in the Tab.
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func (t *Tab) NumPages() int {
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return len(t.children)
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}
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// Margined returns whether page n (starting at 0) of the Tab
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// has margins around its child.
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func (t *Tab) Margined(n int) bool {
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return tobool(C.uiTabMargined(t.t, C.uintmax_t(n)))
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}
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// SetMargined controls whether page n (starting at 0) of the Tab
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// has margins around its child. The size of the margins are
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// determined by the OS and its best practices.
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func (t *Tab) SetMargined(n int, margined bool) {
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C.uiTabSetMargined(t.t, C.uintmax_t(n), frombool(margined))
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}
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