834 lines
18 KiB
Go
834 lines
18 KiB
Go
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// Copyright 2011 The Walk Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// +build windows
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package walk
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import (
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"strconv"
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"syscall"
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"unsafe"
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"github.com/lxn/win"
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)
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const tabWidgetWindowClass = `\o/ Walk_TabWidget_Class \o/`
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func init() {
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AppendToWalkInit(func() {
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MustRegisterWindowClass(tabWidgetWindowClass)
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tabWidgetTabWndProcPtr = syscall.NewCallback(tabWidgetTabWndProc)
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})
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}
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type TabWidget struct {
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WidgetBase
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hWndTab win.HWND
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tabOrigWndProcPtr uintptr
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imageList *ImageList
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pages *TabPageList
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currentIndex int
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currentIndexChangedPublisher EventPublisher
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persistent bool
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}
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func NewTabWidget(parent Container) (*TabWidget, error) {
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tw := &TabWidget{currentIndex: -1}
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tw.pages = newTabPageList(tw)
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if err := InitWidget(
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tw,
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parent,
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tabWidgetWindowClass,
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win.WS_VISIBLE,
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win.WS_EX_CONTROLPARENT); err != nil {
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return nil, err
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}
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succeeded := false
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defer func() {
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if !succeeded {
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tw.Dispose()
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}
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}()
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tw.SetPersistent(true)
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tw.hWndTab = win.CreateWindowEx(
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0, syscall.StringToUTF16Ptr("SysTabControl32"), nil,
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win.WS_CHILD|win.WS_CLIPSIBLINGS|win.WS_TABSTOP|win.WS_VISIBLE,
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0, 0, 0, 0, tw.hWnd, 0, 0, nil)
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if tw.hWndTab == 0 {
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return nil, lastError("CreateWindowEx")
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}
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win.SetWindowLongPtr(tw.hWndTab, win.GWLP_USERDATA, uintptr(unsafe.Pointer(tw)))
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tw.tabOrigWndProcPtr = win.SetWindowLongPtr(tw.hWndTab, win.GWLP_WNDPROC, tabWidgetTabWndProcPtr)
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dpi := int(win.GetDpiForWindow(tw.hWndTab))
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win.SendMessage(tw.hWndTab, win.WM_SETFONT, uintptr(defaultFont.handleForDPI(dpi)), 1)
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tw.applyFont(tw.Font())
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tw.MustRegisterProperty("HasCurrentPage", NewReadOnlyBoolProperty(
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func() bool {
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return tw.CurrentIndex() != -1
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},
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tw.CurrentIndexChanged()))
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tw.MustRegisterProperty("CurrentIndex", NewProperty(
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func() interface{} {
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return tw.CurrentIndex()
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},
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func(v interface{}) error {
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return tw.SetCurrentIndex(assertIntOr(v, -1))
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},
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tw.CurrentIndexChanged()))
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succeeded = true
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return tw, nil
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}
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func (tw *TabWidget) Dispose() {
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tw.WidgetBase.Dispose()
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if tw.imageList != nil {
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tw.imageList.Dispose()
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tw.imageList = nil
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}
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}
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func (tw *TabWidget) applyEnabled(enabled bool) {
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tw.WidgetBase.applyEnabled(enabled)
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setWindowEnabled(tw.hWndTab, enabled)
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applyEnabledToDescendants(tw, enabled)
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}
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func (tw *TabWidget) applyFont(font *Font) {
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tw.WidgetBase.applyFont(font)
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SetWindowFont(tw.hWndTab, font)
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// FIXME: won't work with ApplyDPI
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// applyFontToDescendants(tw, font)
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}
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func (tw *TabWidget) ApplyDPI(dpi int) {
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tw.WidgetBase.ApplyDPI(dpi)
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var maskColor Color
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var size Size
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if tw.imageList != nil {
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maskColor = tw.imageList.maskColor
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size = SizeFrom96DPI(tw.imageList.imageSize96dpi, dpi)
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} else {
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size = SizeFrom96DPI(Size{16, 16}, dpi)
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}
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iml, err := NewImageListForDPI(size, maskColor, dpi)
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if err != nil {
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return
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}
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win.SendMessage(tw.hWndTab, win.TCM_SETIMAGELIST, 0, uintptr(iml.hIml))
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if tw.imageList != nil {
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tw.imageList.Dispose()
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}
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tw.imageList = iml
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for _, page := range tw.pages.items {
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tw.onPageChanged(page)
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}
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}
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func (tw *TabWidget) CurrentIndex() int {
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return tw.currentIndex
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}
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func (tw *TabWidget) SetCurrentIndex(index int) error {
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if index == tw.currentIndex {
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return nil
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}
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if index < 0 || index >= tw.pages.Len() {
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return newError("invalid index")
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}
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ret := int(win.SendMessage(tw.hWndTab, win.TCM_SETCURSEL, uintptr(index), 0))
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if ret == -1 {
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return newError("SendMessage(TCM_SETCURSEL) failed")
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}
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// FIXME: The SendMessage(TCM_SETCURSEL) call above doesn't cause a
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// TCN_SELCHANGE notification, so we use this workaround.
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tw.onSelChange()
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return nil
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}
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func (tw *TabWidget) CurrentIndexChanged() *Event {
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return tw.currentIndexChangedPublisher.Event()
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}
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func (tw *TabWidget) Pages() *TabPageList {
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return tw.pages
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}
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func (tw *TabWidget) Persistent() bool {
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return tw.persistent
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}
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func (tw *TabWidget) SetPersistent(value bool) {
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tw.persistent = value
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}
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func (tw *TabWidget) SaveState() error {
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tw.WriteState(strconv.Itoa(tw.CurrentIndex()))
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for _, page := range tw.pages.items {
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if err := page.SaveState(); err != nil {
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return err
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}
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}
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return nil
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}
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func (tw *TabWidget) RestoreState() error {
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state, err := tw.ReadState()
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if err != nil {
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return err
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}
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if state == "" {
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return nil
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}
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index, err := strconv.Atoi(state)
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if err != nil {
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return err
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}
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if index >= 0 && index < tw.pages.Len() {
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if err := tw.SetCurrentIndex(index); err != nil {
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return err
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}
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}
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for _, page := range tw.pages.items {
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if err := page.RestoreState(); err != nil {
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return err
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}
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}
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return nil
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}
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func (tw *TabWidget) resizePages() {
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bounds := tw.pageBounds()
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for _, page := range tw.pages.items {
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page.SetBoundsPixels(bounds)
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}
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}
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// pageBounds returns page bounds in native pixels.
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func (tw *TabWidget) pageBounds() Rectangle {
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var r win.RECT
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if !win.GetWindowRect(tw.hWndTab, &r) {
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lastError("GetWindowRect")
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return Rectangle{}
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}
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p := win.POINT{
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r.Left,
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r.Top,
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}
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if !win.ScreenToClient(tw.hWnd, &p) {
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newError("ScreenToClient failed")
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return Rectangle{}
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}
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r = win.RECT{
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p.X,
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p.Y,
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r.Right - r.Left + p.X,
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r.Bottom - r.Top + p.Y,
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}
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win.SendMessage(tw.hWndTab, win.TCM_ADJUSTRECT, 0, uintptr(unsafe.Pointer(&r)))
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adjustment := 2 * int32(tw.IntFrom96DPI(1))
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return Rectangle{
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int(r.Left - adjustment),
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int(r.Top),
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int(r.Right - r.Left + adjustment),
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int(r.Bottom - r.Top),
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}
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}
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func (tw *TabWidget) onResize(width, height int32) {
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if !win.MoveWindow(tw.hWndTab, 0, 0, width, height, true) {
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lastError("MoveWindow")
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return
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}
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tw.resizePages()
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}
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func (tw *TabWidget) onSelChange() {
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pageCount := tw.pages.Len()
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if tw.currentIndex > -1 && tw.currentIndex < pageCount {
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page := tw.pages.At(tw.currentIndex)
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page.SetVisible(false)
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}
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tw.currentIndex = int(int32(win.SendMessage(tw.hWndTab, win.TCM_GETCURSEL, 0, 0)))
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if tw.currentIndex > -1 && tw.currentIndex < pageCount {
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page := tw.pages.At(tw.currentIndex)
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page.SetVisible(true)
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tw.RequestLayout()
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page.Invalidate()
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tw.pages.At(tw.currentIndex).focusFirstCandidateDescendant()
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}
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tw.Invalidate()
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tw.currentIndexChangedPublisher.Publish()
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}
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func (tw *TabWidget) WndProc(hwnd win.HWND, msg uint32, wParam, lParam uintptr) uintptr {
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if tw.hWndTab != 0 {
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switch msg {
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case win.WM_ERASEBKGND:
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return 1
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case win.WM_WINDOWPOSCHANGED:
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wp := (*win.WINDOWPOS)(unsafe.Pointer(lParam))
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if wp.Flags&win.SWP_NOSIZE != 0 {
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break
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}
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tw.onResize(wp.Cx, wp.Cy)
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case win.WM_NOTIFY:
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nmhdr := (*win.NMHDR)(unsafe.Pointer(lParam))
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switch int32(nmhdr.Code) {
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case win.TCN_SELCHANGE:
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tw.onSelChange()
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}
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}
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}
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return tw.WidgetBase.WndProc(hwnd, msg, wParam, lParam)
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}
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var tabWidgetTabWndProcPtr uintptr
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func tabWidgetTabWndProc(hwnd win.HWND, msg uint32, wParam, lParam uintptr) uintptr {
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tw := (*TabWidget)(unsafe.Pointer(win.GetWindowLongPtr(hwnd, win.GWLP_USERDATA)))
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switch msg {
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case win.WM_MOUSEMOVE:
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win.InvalidateRect(hwnd, nil, true)
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case win.WM_ERASEBKGND:
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return 1
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case win.WM_PAINT:
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var ps win.PAINTSTRUCT
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hdc := win.BeginPaint(hwnd, &ps)
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defer win.EndPaint(hwnd, &ps)
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cb := tw.ClientBoundsPixels()
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dpi := tw.DPI()
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bitmap, err := NewBitmapForDPI(cb.Size(), dpi)
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if err != nil {
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break
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}
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defer bitmap.Dispose()
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canvas, err := NewCanvasFromImage(bitmap)
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if err != nil {
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break
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}
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defer canvas.Dispose()
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themed := win.IsAppThemed()
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if !themed {
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if err := canvas.FillRectanglePixels(sysColorBtnFaceBrush, cb); err != nil {
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break
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}
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}
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win.SendMessage(hwnd, win.WM_PRINTCLIENT, uintptr(canvas.hdc), uintptr(win.PRF_CLIENT|win.PRF_CHILDREN|win.PRF_ERASEBKGND))
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parent := tw.Parent()
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if parent == nil {
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break
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}
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// Draw background of free area not occupied by tab items.
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if bg, wnd := parent.AsWindowBase().backgroundEffective(); bg != nil {
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tw.prepareDCForBackground(canvas.hdc, hwnd, wnd)
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hRgn := win.CreateRectRgn(0, 0, 0, 0)
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defer win.DeleteObject(win.HGDIOBJ(hRgn))
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var rc win.RECT
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adjustment := SizeFrom96DPI(Size{1, 1}, dpi).toSIZE()
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count := tw.pages.Len()
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for i := 0; i < count; i++ {
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if 0 == win.SendMessage(hwnd, win.TCM_GETITEMRECT, uintptr(i), uintptr(unsafe.Pointer(&rc))) {
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break
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}
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||
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if i == tw.currentIndex {
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rc.Left -= 2 * adjustment.CX
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rc.Top -= 2 * adjustment.CY
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rc.Right += 2 * adjustment.CX
|
||
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} else {
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||
|
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if i == count-1 && themed {
|
||
|
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rc.Right -= 2 * adjustment.CX
|
||
|
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}
|
||
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|
}
|
||
|
|
|
||
|
|
hRgnTab := win.CreateRectRgn(rc.Left, rc.Top, rc.Right, rc.Bottom)
|
||
|
|
win.CombineRgn(hRgn, hRgn, hRgnTab, win.RGN_OR)
|
||
|
|
win.DeleteObject(win.HGDIOBJ(hRgnTab))
|
||
|
|
}
|
||
|
|
|
||
|
|
hRgnRC := win.CreateRectRgn(0, 0, int32(cb.Width), rc.Bottom)
|
||
|
|
win.CombineRgn(hRgn, hRgnRC, hRgn, win.RGN_DIFF)
|
||
|
|
win.DeleteObject(win.HGDIOBJ(hRgnRC))
|
||
|
|
|
||
|
|
if !win.FillRgn(canvas.hdc, hRgn, bg.handle()) {
|
||
|
|
break
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// Draw current tab item.
|
||
|
|
if tw.currentIndex != -1 {
|
||
|
|
page := tw.pages.At(tw.CurrentIndex())
|
||
|
|
|
||
|
|
if bg, wnd := page.AsWindowBase().backgroundEffective(); bg != nil &&
|
||
|
|
bg != tabPageBackgroundBrush &&
|
||
|
|
(page.layout == nil || !page.layout.Margins().isZero()) {
|
||
|
|
|
||
|
|
tw.prepareDCForBackground(canvas.hdc, hwnd, wnd)
|
||
|
|
|
||
|
|
var rc win.RECT
|
||
|
|
if 0 == win.SendMessage(hwnd, win.TCM_GETITEMRECT, uintptr(tw.currentIndex), uintptr(unsafe.Pointer(&rc))) {
|
||
|
|
break
|
||
|
|
}
|
||
|
|
|
||
|
|
adjustment := SizeFrom96DPI(Size{6, 1}, dpi).toSIZE()
|
||
|
|
hRgn := win.CreateRectRgn(rc.Left, rc.Top, rc.Right, rc.Bottom+2*adjustment.CY)
|
||
|
|
defer win.DeleteObject(win.HGDIOBJ(hRgn))
|
||
|
|
if !win.FillRgn(canvas.hdc, hRgn, bg.handle()) {
|
||
|
|
break
|
||
|
|
}
|
||
|
|
|
||
|
|
if page.image != nil {
|
||
|
|
x := rc.Left + adjustment.CX
|
||
|
|
y := rc.Top
|
||
|
|
s := int32(IntFrom96DPI(16, dpi))
|
||
|
|
|
||
|
|
bmp, err := iconCache.Bitmap(page.image, dpi)
|
||
|
|
if err == nil {
|
||
|
|
if imageCanvas, err := NewCanvasFromImage(bmp); err == nil {
|
||
|
|
defer imageCanvas.Dispose()
|
||
|
|
|
||
|
|
if !win.TransparentBlt(
|
||
|
|
canvas.hdc, x, y, s, s,
|
||
|
|
imageCanvas.hdc, 0, 0, int32(bmp.size.Width), int32(bmp.size.Height),
|
||
|
|
0) {
|
||
|
|
break
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
rc.Left += s + adjustment.CX
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
rc.Left += adjustment.CX
|
||
|
|
rc.Top += adjustment.CY
|
||
|
|
|
||
|
|
title := syscall.StringToUTF16(page.title)
|
||
|
|
|
||
|
|
if themed {
|
||
|
|
hTheme := win.OpenThemeData(hwnd, syscall.StringToUTF16Ptr("tab"))
|
||
|
|
defer win.CloseThemeData(hTheme)
|
||
|
|
|
||
|
|
options := win.DTTOPTS{DwFlags: win.DTT_GLOWSIZE, IGlowSize: int32(IntFrom96DPI(3, dpi))}
|
||
|
|
options.DwSize = uint32(unsafe.Sizeof(options))
|
||
|
|
if hr := win.DrawThemeTextEx(hTheme, canvas.hdc, 0, win.TIS_SELECTED, &title[0], int32(len(title)), 0, &rc, &options); !win.SUCCEEDED(hr) {
|
||
|
|
break
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
if 0 == win.DrawTextEx(canvas.hdc, &title[0], int32(len(title)), &rc, 0, nil) {
|
||
|
|
break
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if !win.BitBlt(hdc, 0, 0, int32(cb.Width), int32(cb.Height), canvas.hdc, 0, 0, win.SRCCOPY) {
|
||
|
|
break
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0
|
||
|
|
|
||
|
|
case win.WM_LBUTTONDOWN:
|
||
|
|
x := win.GET_X_LPARAM(lParam)
|
||
|
|
y := win.GET_Y_LPARAM(lParam)
|
||
|
|
|
||
|
|
hti := win.TCHITTESTINFO{
|
||
|
|
Pt: win.POINT{x, y},
|
||
|
|
}
|
||
|
|
|
||
|
|
i := int(win.SendMessage(hwnd, win.TCM_HITTEST, 0, uintptr(unsafe.Pointer(&hti))))
|
||
|
|
|
||
|
|
if i == -1 {
|
||
|
|
break
|
||
|
|
}
|
||
|
|
|
||
|
|
ret := win.CallWindowProc(tw.tabOrigWndProcPtr, hwnd, msg, wParam, lParam)
|
||
|
|
|
||
|
|
tw.pages.At(i).focusFirstCandidateDescendant()
|
||
|
|
|
||
|
|
return ret
|
||
|
|
}
|
||
|
|
|
||
|
|
return win.CallWindowProc(tw.tabOrigWndProcPtr, hwnd, msg, wParam, lParam)
|
||
|
|
}
|
||
|
|
|
||
|
|
func (tw *TabWidget) onPageChanged(page *TabPage) (err error) {
|
||
|
|
index := tw.pages.Index(page)
|
||
|
|
item := tw.tcitemFromPage(page)
|
||
|
|
|
||
|
|
if 0 == win.SendMessage(tw.hWndTab, win.TCM_SETITEM, uintptr(index), uintptr(unsafe.Pointer(item))) {
|
||
|
|
return newError("SendMessage(TCM_SETITEM) failed")
|
||
|
|
}
|
||
|
|
|
||
|
|
return nil
|
||
|
|
}
|
||
|
|
|
||
|
|
func (tw *TabWidget) onInsertingPage(index int, page *TabPage) (err error) {
|
||
|
|
return nil
|
||
|
|
}
|
||
|
|
|
||
|
|
func (tw *TabWidget) onInsertedPage(index int, page *TabPage) (err error) {
|
||
|
|
item := tw.tcitemFromPage(page)
|
||
|
|
|
||
|
|
if idx := int(win.SendMessage(tw.hWndTab, win.TCM_INSERTITEM, uintptr(index), uintptr(unsafe.Pointer(item)))); idx == -1 {
|
||
|
|
return newError("SendMessage(TCM_INSERTITEM) failed")
|
||
|
|
}
|
||
|
|
|
||
|
|
page.SetVisible(false)
|
||
|
|
|
||
|
|
style := uint32(win.GetWindowLong(page.hWnd, win.GWL_STYLE))
|
||
|
|
if style == 0 {
|
||
|
|
return lastError("GetWindowLong")
|
||
|
|
}
|
||
|
|
|
||
|
|
style |= win.WS_CHILD
|
||
|
|
style &^= win.WS_POPUP
|
||
|
|
|
||
|
|
win.SetLastError(0)
|
||
|
|
if win.SetWindowLong(page.hWnd, win.GWL_STYLE, int32(style)) == 0 {
|
||
|
|
return lastError("SetWindowLong")
|
||
|
|
}
|
||
|
|
|
||
|
|
if win.SetParent(page.hWnd, tw.hWnd) == 0 {
|
||
|
|
return lastError("SetParent")
|
||
|
|
}
|
||
|
|
|
||
|
|
if tw.pages.Len() == 1 {
|
||
|
|
page.SetVisible(true)
|
||
|
|
tw.SetCurrentIndex(0)
|
||
|
|
}
|
||
|
|
|
||
|
|
tw.resizePages()
|
||
|
|
|
||
|
|
page.tabWidget = tw
|
||
|
|
|
||
|
|
page.applyFont(tw.Font())
|
||
|
|
|
||
|
|
tw.Invalidate()
|
||
|
|
|
||
|
|
return
|
||
|
|
}
|
||
|
|
|
||
|
|
func (tw *TabWidget) removePage(page *TabPage) (err error) {
|
||
|
|
page.SetVisible(false)
|
||
|
|
|
||
|
|
style := uint32(win.GetWindowLong(page.hWnd, win.GWL_STYLE))
|
||
|
|
if style == 0 {
|
||
|
|
return lastError("GetWindowLong")
|
||
|
|
}
|
||
|
|
|
||
|
|
style &^= win.WS_CHILD
|
||
|
|
style |= win.WS_POPUP
|
||
|
|
|
||
|
|
win.SetLastError(0)
|
||
|
|
if win.SetWindowLong(page.hWnd, win.GWL_STYLE, int32(style)) == 0 {
|
||
|
|
return lastError("SetWindowLong")
|
||
|
|
}
|
||
|
|
|
||
|
|
page.tabWidget = nil
|
||
|
|
|
||
|
|
return page.SetParent(nil)
|
||
|
|
}
|
||
|
|
|
||
|
|
func (tw *TabWidget) onRemovingPage(index int, page *TabPage) (err error) {
|
||
|
|
return nil
|
||
|
|
}
|
||
|
|
|
||
|
|
func (tw *TabWidget) onRemovedPage(index int, page *TabPage) (err error) {
|
||
|
|
err = tw.removePage(page)
|
||
|
|
if err != nil {
|
||
|
|
return
|
||
|
|
}
|
||
|
|
|
||
|
|
win.SendMessage(tw.hWndTab, win.TCM_DELETEITEM, uintptr(index), 0)
|
||
|
|
|
||
|
|
if tw.pages.Len() > 0 {
|
||
|
|
tw.currentIndex = 0
|
||
|
|
win.SendMessage(tw.hWndTab, win.TCM_SETCURSEL, uintptr(tw.currentIndex), 0)
|
||
|
|
} else {
|
||
|
|
tw.currentIndex = -1
|
||
|
|
}
|
||
|
|
tw.onSelChange()
|
||
|
|
|
||
|
|
return
|
||
|
|
|
||
|
|
// FIXME: Either make use of this unreachable code or remove it.
|
||
|
|
if index == tw.currentIndex {
|
||
|
|
// removal of current visible tabpage...
|
||
|
|
tw.currentIndex = -1
|
||
|
|
|
||
|
|
// select new tabpage if any :
|
||
|
|
if tw.pages.Len() > 0 {
|
||
|
|
// are we removing the rightmost page ?
|
||
|
|
if index == tw.pages.Len()-1 {
|
||
|
|
// If so, select the page on the left
|
||
|
|
index -= 1
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
tw.SetCurrentIndex(index)
|
||
|
|
|
||
|
|
tw.Invalidate()
|
||
|
|
|
||
|
|
return
|
||
|
|
}
|
||
|
|
|
||
|
|
func (tw *TabWidget) onClearingPages(pages []*TabPage) (err error) {
|
||
|
|
return nil
|
||
|
|
}
|
||
|
|
|
||
|
|
func (tw *TabWidget) onClearedPages(pages []*TabPage) (err error) {
|
||
|
|
win.SendMessage(tw.hWndTab, win.TCM_DELETEALLITEMS, 0, 0)
|
||
|
|
for _, page := range pages {
|
||
|
|
tw.removePage(page)
|
||
|
|
}
|
||
|
|
tw.currentIndex = -1
|
||
|
|
|
||
|
|
tw.Invalidate()
|
||
|
|
|
||
|
|
return nil
|
||
|
|
}
|
||
|
|
|
||
|
|
func (tw *TabWidget) tcitemFromPage(page *TabPage) *win.TCITEM {
|
||
|
|
var imageIndex int32 = -1
|
||
|
|
if page.image != nil {
|
||
|
|
if bmp, err := iconCache.Bitmap(page.image, tw.DPI()); err == nil {
|
||
|
|
imageIndex, _ = tw.imageIndex(bmp)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
text := syscall.StringToUTF16(page.title)
|
||
|
|
|
||
|
|
item := &win.TCITEM{
|
||
|
|
Mask: win.TCIF_IMAGE | win.TCIF_TEXT,
|
||
|
|
IImage: imageIndex,
|
||
|
|
PszText: &text[0],
|
||
|
|
CchTextMax: int32(len(text)),
|
||
|
|
}
|
||
|
|
|
||
|
|
return item
|
||
|
|
}
|
||
|
|
|
||
|
|
func (tw *TabWidget) imageIndex(image *Bitmap) (index int32, err error) {
|
||
|
|
index = -1
|
||
|
|
if image != nil {
|
||
|
|
if tw.imageList == nil {
|
||
|
|
dpi := tw.DPI()
|
||
|
|
if tw.imageList, err = NewImageListForDPI(SizeFrom96DPI(Size{16, 16}, dpi), 0, dpi); err != nil {
|
||
|
|
return
|
||
|
|
}
|
||
|
|
|
||
|
|
win.SendMessage(tw.hWndTab, win.TCM_SETIMAGELIST, 0, uintptr(tw.imageList.hIml))
|
||
|
|
}
|
||
|
|
|
||
|
|
if index, err = tw.imageList.AddMasked(image); err != nil {
|
||
|
|
return
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return
|
||
|
|
}
|
||
|
|
|
||
|
|
func (tw *TabWidget) CreateLayoutItem(ctx *LayoutContext) LayoutItem {
|
||
|
|
pages := make([]LayoutItem, tw.pages.Len())
|
||
|
|
|
||
|
|
bounds := tw.pageBounds()
|
||
|
|
|
||
|
|
li := &tabWidgetLayoutItem{
|
||
|
|
pagePos: bounds.Location(),
|
||
|
|
currentIndex: tw.CurrentIndex(),
|
||
|
|
}
|
||
|
|
|
||
|
|
for i := tw.pages.Len() - 1; i >= 0; i-- {
|
||
|
|
var page LayoutItem
|
||
|
|
if p := tw.pages.At(i); p.Layout() != nil {
|
||
|
|
page = CreateLayoutItemsForContainerWithContext(p, ctx)
|
||
|
|
} else {
|
||
|
|
page = NewGreedyLayoutItem()
|
||
|
|
}
|
||
|
|
|
||
|
|
lib := page.AsLayoutItemBase()
|
||
|
|
lib.ctx = ctx
|
||
|
|
lib.parent = li
|
||
|
|
pages[i] = page
|
||
|
|
}
|
||
|
|
|
||
|
|
li.children = pages
|
||
|
|
|
||
|
|
return li
|
||
|
|
}
|
||
|
|
|
||
|
|
type tabWidgetLayoutItem struct {
|
||
|
|
ContainerLayoutItemBase
|
||
|
|
pagePos Point // in native pixels
|
||
|
|
currentIndex int
|
||
|
|
}
|
||
|
|
|
||
|
|
func (li *tabWidgetLayoutItem) LayoutFlags() LayoutFlags {
|
||
|
|
if len(li.children) == 0 {
|
||
|
|
return ShrinkableHorz | ShrinkableVert | GrowableHorz | GrowableVert | GreedyHorz | GreedyVert
|
||
|
|
}
|
||
|
|
|
||
|
|
var flags LayoutFlags
|
||
|
|
|
||
|
|
for _, page := range li.children {
|
||
|
|
flags |= page.LayoutFlags()
|
||
|
|
}
|
||
|
|
|
||
|
|
return flags
|
||
|
|
}
|
||
|
|
|
||
|
|
func (li *tabWidgetLayoutItem) MinSize() Size {
|
||
|
|
if len(li.children) == 0 {
|
||
|
|
return li.IdealSize()
|
||
|
|
}
|
||
|
|
|
||
|
|
var min Size
|
||
|
|
|
||
|
|
for _, page := range li.children {
|
||
|
|
if ms, ok := page.(MinSizer); ok {
|
||
|
|
s := ms.MinSize()
|
||
|
|
|
||
|
|
min.Width = maxi(min.Width, s.Width)
|
||
|
|
min.Height = maxi(min.Height, s.Height)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
s := li.geometry.Size
|
||
|
|
ps := li.children[0].Geometry().Size
|
||
|
|
|
||
|
|
size := Size{s.Width - ps.Width + min.Width, s.Height - ps.Height + min.Height}
|
||
|
|
|
||
|
|
return size
|
||
|
|
}
|
||
|
|
|
||
|
|
func (li *tabWidgetLayoutItem) MinSizeForSize(size Size) Size {
|
||
|
|
return li.MinSize()
|
||
|
|
}
|
||
|
|
|
||
|
|
func (li *tabWidgetLayoutItem) HasHeightForWidth() bool {
|
||
|
|
if len(li.children) == 0 {
|
||
|
|
return false
|
||
|
|
}
|
||
|
|
|
||
|
|
for _, page := range li.children {
|
||
|
|
if hfw, ok := page.(HeightForWidther); ok && hfw.HasHeightForWidth() {
|
||
|
|
return true
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return false
|
||
|
|
}
|
||
|
|
|
||
|
|
func (li *tabWidgetLayoutItem) HeightForWidth(width int) int {
|
||
|
|
if len(li.children) == 0 {
|
||
|
|
return 0
|
||
|
|
}
|
||
|
|
|
||
|
|
var height int
|
||
|
|
margin := li.geometry.Size
|
||
|
|
pageSize := li.children[0].Geometry().Size
|
||
|
|
|
||
|
|
margin.Width -= pageSize.Width
|
||
|
|
margin.Height -= pageSize.Height
|
||
|
|
|
||
|
|
for _, page := range li.children {
|
||
|
|
if hfw, ok := page.(HeightForWidther); ok && hfw.HasHeightForWidth() {
|
||
|
|
h := hfw.HeightForWidth(width + margin.Width)
|
||
|
|
|
||
|
|
height = maxi(height, h)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return height + margin.Height
|
||
|
|
}
|
||
|
|
|
||
|
|
func (li *tabWidgetLayoutItem) IdealSize() Size {
|
||
|
|
return li.MinSize()
|
||
|
|
}
|
||
|
|
|
||
|
|
func (li *tabWidgetLayoutItem) PerformLayout() []LayoutResultItem {
|
||
|
|
if li.currentIndex > -1 {
|
||
|
|
page := li.children[li.currentIndex]
|
||
|
|
|
||
|
|
adjustment := IntFrom96DPI(1, li.ctx.dpi)
|
||
|
|
return []LayoutResultItem{
|
||
|
|
{
|
||
|
|
Item: page,
|
||
|
|
Bounds: Rectangle{
|
||
|
|
X: li.pagePos.X,
|
||
|
|
Y: li.pagePos.Y,
|
||
|
|
Width: li.geometry.Size.Width - li.pagePos.X*2 - adjustment,
|
||
|
|
Height: li.geometry.Size.Height - li.pagePos.Y - 2*adjustment,
|
||
|
|
},
|
||
|
|
},
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return nil
|
||
|
|
}
|