Exemple #1
0
        private ShengAddressBarDropDown GetButtonDropDown(IShengAddressNode addressNode)
        {
            ShengAddressBarDropDown dropDown = new ShengAddressBarDropDown();

            if (this.DropDownRenderer != null)
            {
                dropDown.Renderer = this.DropDownRenderer;
            }

            dropDown.LayoutStyle = ToolStripLayoutStyle.Table;
            dropDown.MaximumSize = new Size(1000, 400);
            dropDown.Opening    += new CancelEventHandler(DropDown_Opening);

            /*
             * This is the primary bottleneck for this app, creating all the necessary drop-down menu items.
             *
             * To optimize performance of this control, this is the main area that needs tuning.
             */

            IShengAddressNode curNode = null;

            for (int i = 0; i < addressNode.Children.Length; i++)
            {
                curNode = (IShengAddressNode)addressNode.Children.GetValue(i);

                ShengAddressBarDropDownItem tsb = null;

                tsb = new ShengAddressBarDropDownItem(curNode.DisplayName, curNode.Icon, NodeButtonClicked);

                tsb.AddressNode = curNode;

                tsb.Overflow = ToolStripItemOverflow.AsNeeded;

                dropDown.Items.Add(tsb); //THIS IS THE BIGGEST BOTTLENECK. LOTS OF TIME SPENT IN/CALLING THIS METHOD!
            }

            addressNode.DropDownMenu = dropDown;

            dropDown.LayoutStyle = ToolStripLayoutStyle.Table;
            dropDown.MaximumSize = new Size(1000, 400);

            dropDown.AddressNode = addressNode;

            //不起作用
            dropDown.MouseWheel += new MouseEventHandler(ScrollDropDownMenu);
            dropDown.MouseEnter += new EventHandler(GiveToolStripDropDownMenuFocus);

            return(dropDown);
        }
Exemple #2
0
        /// <summary>
        /// Method to handle when a child has been selected from a node
        /// </summary>
        /// <param name="sender">Sender of this Event</param>
        /// <param name="e">Event Arguments</param>
        private void NodeButtonClicked(Object sender, EventArgs e)
        {
            if (sender.GetType() == typeof(ShengAddressBarDropDownItem) || sender.GetType() == typeof(ShengAddressBarButton))
            {
                IShengAddressNode addressNode;

                if (sender.GetType() == typeof(ShengAddressBarDropDownItem))
                {
                    ShengAddressBarDropDownItem tsb = (ShengAddressBarDropDownItem)sender;
                    addressNode = tsb.AddressNode;
                }
                else
                {
                    ShengAddressBarButton tsb = (ShengAddressBarButton)sender;
                    addressNode = tsb.AddressNode;
                }

                //set the current node
                _currentNode = addressNode;

                //cxs
                //用不着整个都重新加载,在当前最后一个Item后面加上点的这个就行了
                //但是要额外考虑点击的是哪个下拉按钮,如果是中间的,还是要整个刷
                ResetBar();
                //if (sender.GetType().Equals(typeof(SEAddressBarButton)))
                //{
                //    UpdateBar();
                //}
                //else
                //{
                //    AddToolStripItemUpdate(ref _currentNode,ButtonPosition.Behind);
                //}

                //if the selection changed event is handled
                if (SelectionChange != null)
                {
                    NodeChangedArgs args = new NodeChangedArgs(_currentNode.UniqueID);
                    SelectionChange(this, args);
                }

                return;
            }
        }
Exemple #3
0
        /// <summary>
        /// 添加一个地址栏项
        /// </summary>
        /// <param name="button"></param>
        /// <param name="position"></param>
        private void AddAddressBarButton(ShengAddressBarButton button, ButtonPosition position)
        {
            //如果当前显示了最左下拉菜单,就需要直接加在最左下拉菜单下
            //如果直接加左边,可能整个地址条是够显示的,就造成这一项出现在最左下拉前面
            //并且如果直接加在最左下拉下面,就不用去管是否还有子级了,因为不需要显示那个向下箭头了
            if (this.Items.Contains(_overflowButton))
            {
                ShengAddressBarDropDownItem dropDownItem = new ShengAddressBarDropDownItem(button.Text, button.Image, NodeButtonClicked);
                dropDownItem.AddressNode = button.AddressNode;
                //_overflowButton.DropDown.Items.Add(dropDownItem);
                _overflowDropDown.Items.Add(dropDownItem);
            }
            else
            {
                //处理子级,如果需要,需要显示一个向下箭头
                BuildChildItem(button);

                if (position == ButtonPosition.Behind)
                {
                    this.Items.Add(button);
                    if (button.DropDownButton != null)
                    {
                        this.Items.Add(button.DropDownButton);
                    }

                    _buttonList.Add(button);
                }
                else
                {
                    this.Items.Insert(0, button);
                    if (button.DropDownButton != null)
                    {
                        this.Items.Insert(1, button.DropDownButton);
                    }

                    _buttonList.Insert(0, button);
                }
            }
        }
Exemple #4
0
        /// <summary>
        /// 创建最左下拉菜单
        /// </summary>
        private void CreateOverflowDropDown()
        {
            //在最左边添加下拉菜单
            if (this.Items.Contains(_overflowButton) == false)
            {
                this.Items.Insert(0, _overflowButton);
                _overflowButton.OwnerChanged += new EventHandler(OverflowDestroyed);

                if (this.DropDownRenderer != null)
                {
                    _overflowDropDown.Renderer = this.DropDownRenderer;
                }
            }

            /*
             * 把第一项移到前下拉里,然后测试是否还是不够显示,如果还是不够
             * 再次把第一项移到前下拉里,如此反复
             * 但有一点,需判断第一项是否就是当前项,如果就是当前项,则表示是当前项显示文本太长
             * 所以不够显示,需要截断当前项的显示文本
             */

            _overflowDropDown.Items.Clear();

            while (true)
            {
                ShengAddressBarButton frontButton = _buttonList[0];

                //如果当前节点已经是最右边的节点了
                if (_currentNode == frontButton.AddressNode)
                {
                    //计算可以显示的宽度
                    int itemWidth = 0;
                    foreach (ToolStripItem item in frontButton.Owner.Items)
                    {
                        if (item == frontButton)
                        {
                            continue;
                        }

                        itemWidth += item.Width;
                    }
                    itemWidth = frontButton.Owner.Width - itemWidth - 40;

                    frontButton.Text = AdjustTextForDisplay(frontButton.Text, itemWidth, frontButton.Font);
                    break;


                    ////通过截断显示字符串的方式以让它能显示得下
                    ////简单起见,直接截一半,暂时不去测量文本了,截完以后需继续判断,不行再截一半,直到截到最后个字符
                    //if (frontButton.Text.Length <= 1)
                    //{
                    //    break;
                    //}
                    //else
                    //{
                    //    frontButton.Text = frontButton.Text.Substring(0, frontButton.Text.Length / 2) + "...";
                    //    if (IsManyNodes())
                    //    {
                    //        CreateOverflowDropDown();
                    //    }
                    //    break;
                    //}
                }
                else
                {
                    ShengAddressBarDropDownItem dropDownItem = null;
                    dropDownItem             = new ShengAddressBarDropDownItem(frontButton.Text, frontButton.Image, NodeButtonClicked);
                    dropDownItem.AddressNode = frontButton.AddressNode;

                    //把靠左边的第一个项移入最左下拉菜单的顶部
                    _overflowDropDown.Items.Insert(0, dropDownItem);

                    this.Items.Remove(frontButton);
                    if (frontButton.DropDownButton != null)
                    {
                        this.Items.Remove(frontButton.DropDownButton);
                    }

                    _buttonList.Remove(frontButton);
                }

                if (IsManyNodes() == false)
                {
                    break;
                }
            }
        }