Avalondock新标签定位和订单

时间:2013-01-21 10:31:05

标签: wpf avalondock

我有一个使用Avalon Dock 2.0作为停靠管理器的WPF应用程序。我正面临着Avalon Dock正在执行的新打开标签的标准定位问题。

只要所有标签都适合标签栏,标签栏最右侧的位置就会附加一个新标签。只要新选项卡不适合栏,就会在最左侧的位置添加新选项卡,使前一个最右边的选项卡消失。

我知道这是Visual Studio标准行为,但在我的应用程序中,顺序有意义。这意味着应始终在最左侧或最右侧位置添加新选项卡。该开关对用户来说非常混乱。

有没有办法让Avalon Dock总是在最左边或最右边的位置添加一个新标签?

1 个答案:

答案 0 :(得分:4)

我明白了。我从DocumentPaneTabPanel更改了ArrangeOverride(Size finalSize)方法中的代码,以防止将当前选项卡重新定位到第一个位置。

它现在隐藏了当前一个不适合面板的左边的标签 - 首先隐藏最左边的标签。当前一个标签右侧的标签也被隐藏 - 这里最右侧的标签首先被隐藏。如果存在溢出,则当前选项卡始终位于面板的最右侧。目前这有点脏,但我认为以更好的方式实现这一点不应该那么难。

以下是代码:

    protected override Size ArrangeOverride(Size finalSize)
    {
        double offset = 0.0;
        var children = Children.Cast<UIElement>().Where(ch => ch.Visibility != System.Windows.Visibility.Collapsed).ToList();
        if (children.Count > 0)
        {
            //find currently selected tab
            int i = 0;
            for (i = 0; i < children.Count(); i++)
            {
                TabItem doc = (TabItem)children[i];
                var layoutContent = doc.Content as LayoutContent;
                if (layoutContent.IsSelected)
                    break;
            }

            //calculate how many tabs left from the currently selected would fit in the panel
            int cur_ind = i;
            TabItem current_item = (TabItem)children[cur_ind];
            List<TabItem> t_to_display = new List<TabItem>();
            while (cur_ind >= 0 && offset + current_item.DesiredSize.Width <= finalSize.Width)
            {
                current_item = (TabItem)children[cur_ind];
                current_item.Visibility = System.Windows.Visibility.Visible;
                offset += current_item.DesiredSize.Width + current_item.Margin.Left + current_item.Margin.Right;
                t_to_display.Add(current_item);
                --cur_ind;
            }

            //arrange the fitting tabs on the left
            double cur_offset = offset;
            foreach (TabItem t in t_to_display)
            {
                cur_offset -= t.DesiredSize.Width + t.Margin.Left + t.Margin.Right;
                t.Arrange(new Rect(cur_offset, 0.0, t.DesiredSize.Width, finalSize.Height));
            }

            //arrange the tabs on the right
            cur_ind = i + 1;
            while (cur_ind < children.Count && offset + current_item.DesiredSize.Width <= finalSize.Width)
            {
                current_item = (TabItem)children[cur_ind];
                current_item.Visibility = System.Windows.Visibility.Visible;
                current_item.Arrange(new Rect(offset, 0.0, current_item.DesiredSize.Width, finalSize.Height));
                offset += current_item.DesiredSize.Width + current_item.Margin.Left + current_item.Margin.Right;
                cur_ind++;
            }

            while(cur_ind < children.Count)
            {
                current_item = (TabItem)children[cur_ind];
                current_item.Visibility = System.Windows.Visibility.Hidden;
                cur_ind++;
            }
        }

        return finalSize;

    }