Method ControlUpdateCurrentTab

source/script_gui.cpp:9886–10085

void GuiType::ControlUpdateCurrentTab(GuiControlType &aTabControl, bool aFocusFirstControl)
// Handles the selection of a new tab in a tab control.
{
	int curr_tab_index = TabCtrl_GetCurSel(aTabControl.hwnd);
	// If there's no tab selected, any controls contained by the tab control should be hidden.
	// This can happen if all tabs are removed, such as by GuiControl,,TabCtl,|
	//if (curr_tab_index == -1) // No tab is selected.
	//	return;

	// Fix for v1.0.23:
	// If the tab control lacks the visible property, hide all its controls on all its tabs.
	// Don't use IsWindowVisible() because that would say that tab is hidden just because the parent
	// window is hidden, which is not desirable because then when the parent is shown, the shower
	// would always have to remember to call us.  This "hide all" behavior is done here rather than
	// attempting to "rely on everyone else to do their jobs of keeping the controls in the right state"
	// because it improves maintainability:
	DWORD tab_style = GetWindowLong(aTabControl.hwnd, GWL_STYLE);
	bool hide_all = !(tab_style & WS_VISIBLE); // Regardless of whether mHwnd is visible or not.
	bool disable_all = (tab_style & WS_DISABLED); // Don't use IsWindowEnabled() because it might return false if parent is disabled?
	// Say that the focus was already set correctly if the entire tab control is hidden or caller said
	// not to focus it:
	bool focus_was_set;
	bool parent_is_visible = IsWindowVisible(mHwnd);
	bool parent_is_visible_and_not_minimized = parent_is_visible && !IsIconic(mHwnd);
	if (hide_all || disable_all)
		focus_was_set = true;  // Tell the below not to set focus, since all tab controls are hidden or disabled.
	else if (aFocusFirstControl)  // Note that SetFocus() has an effect even if the parent window is hidden. i.e. next time the window is shown, the control will be focused.
		focus_was_set = false; // Tell it to focus the first control on the new page.
	else
	{
		HWND focused_hwnd;
		GuiControlType *focused_control;
		// If the currently focused control is somewhere in this tab control (but not the tab control
		// itself, because arrow-key navigation relies on tabs stay focused while the user is pressing
		// left and right-arrow), override the fact that aFocusFirstControl is false so that when the
		// page changes, its first control will be focused:
		focus_was_set = !(   parent_is_visible && (focused_hwnd = GetFocus())
			&& (focused_control = FindControl(focused_hwnd))
			&& focused_control->tab_control_index == aTabControl.tab_index   );
	}

	bool will_be_visible, will_be_enabled, has_visible_style, has_enabled_style, member_of_current_tab, control_state_altered;
	DWORD style;
	RECT rect, tab_rect;
	POINT *rect_pt = (POINT *)▭ // i.e. have rect_pt be an array of the two points already within rect.

	GetWindowRect(aTabControl.hwnd, &tab_rect);

	// Update: Don't do the below because it causes a tab to look focused even when it isn't in cases
	// where a control was focused while drawing was suspended.  This is because the below omits the
	// tab rows themselves from the InvalidateRect() further below:
	// Tabs on left (TCS_BUTTONS only) require workaround, at least on XP.  Otherwise tab_rect.left will be
	// much too large.  Because of this, include entire tab rect if it can't be "deflated" reliably:
	//if (!(tab_style & TCS_VERTICAL) || (tab_style & TCS_RIGHT) || !(tab_style & TCS_BUTTONS))
	//	TabCtrl_AdjustRect(aTabControl.hwnd, FALSE, &tab_rect); // Reduce it to just the area without the tabs, since the tabs have already been redrawn.

	HWND tab_dialog = (HWND)GetProp(aTabControl.hwnd, _T("ahk_dlg"));
	if (tab_dialog)