请教一个c#中实现word工具栏中字体颜色按钮的问题。

Question

word中当用工具栏中的字体颜色按钮选择颜色后，按钮上“A”下面的一条颜色会随之改变，请问这个功能是怎么实现的？

Answer 1

        internal class ColorPopup
        {
            XtraTabControl tabControl;
            Color fResultColor;
            BarItem itemColor;
            PopupControlContainer container;
            public ColorPopup(BarButtonItem item, Color initColor)
            {
                this.container = new PopupControlContainer();
                item.DropDownControl = container;
                this.itemColor = item;
                this.fResultColor = initColor;
                this.tabControl = CreateTabControl();
                this.tabControl.TabStop = false;
                this.tabControl.TabPages.AddRange(new XtraTabPage[] { new XtraTabPage(), new XtraTabPage(), new XtraTabPage() });
                for (int i = 0; i < tabControl.TabPages.Count; i++) SetTabPageProperties(i);
                tabControl.Dock = DockStyle.Fill;
                this.container.Controls.AddRange(new System.Windows.Forms.Control[] { tabControl });
                this.container.Size = CalcFormSize();
                OnEnterColor(fResultColor);
            }
            private XtraTabControl CreateTabControl() { return new XtraTabControl(); }
            private ColorListBox CreateColorListBox() { return new ColorListBox(); }
            private void SetTabPageProperties(int pageIndex)
            {
                XtraTabPage tabPage = this.tabControl.TabPages[pageIndex];
                ColorListBox colorBox = null;
                BaseControl control = null;
                switch (pageIndex)
                {
                    case 0:
                        tabPage.Text = Localizer.Active.GetLocalizedString(StringId.ColorTabCustom);
                        control = new ColorCellsControl(null);
                        DevExpress.XtraEditors.Repository.RepositoryItemColorEdit rItem = new DevExpress.XtraEditors.Repository.RepositoryItemColorEdit();
                        rItem.ShowColorDialog = false;
                        (control as ColorCellsControl).Properties = rItem;
                        (control as ColorCellsControl).EnterColor += new EnterColorEventHandler(OnEnterColor);
                        control.Size = ColorCellsControlViewInfo.BestSize;
                        break;
                    case 1:
                        tabPage.Text = Localizer.Active.GetLocalizedString(StringId.ColorTabWeb);
                        colorBox = CreateColorListBox();
                        colorBox.Items.AddRange(ColorListBoxViewInfo.WebColors);
                        colorBox.EnterColor += new EnterColorEventHandler(OnEnterColor);
                        control = colorBox;
                        break;
                    case 2:
                        tabPage.Text = Localizer.Active.GetLocalizedString(StringId.ColorTabSystem);
                        colorBox = CreateColorListBox();
                        colorBox.Items.AddRange(ColorListBoxViewInfo.SystemColors);
                        colorBox.EnterColor += new EnterColorEventHandler(OnEnterColor);
                        control = colorBox;
                        break;
                }
                control.Dock = DockStyle.Fill;
                control.BorderStyle = BorderStyles.NoBorder;
                control.LookAndFeel.ParentLookAndFeel = itemColor.Manager.GetController().LookAndFeel;
                tabPage.Controls.Add(control);
            }
            private void OnEnterColor(object sender, EnterColorEventArgs e)
            {
                fResultColor = e.Color;
                container.HidePopup();
                OnEnterColor(e.Color);
            }
            private void OnEnterColor(Color clr)
            {
                container.HidePopup();
                int imIndex = itemColor.ImageIndex;
                ImageCollection iml = itemColor.Images as ImageCollection;
                Image im = iml.Images[imIndex];
                Graphics g = Graphics.FromImage(im);
                Rectangle r = new Rectangle(0, 12, 16, 4);
                g.FillRectangle(new SolidBrush(clr), r);
                if (imIndex == iml.Images.Count - 1)
                    iml.Images.RemoveAt(imIndex);
                g.Dispose();
                iml.Images.Add(im);
                itemColor.ImageIndex = iml.Images.Count - 1;
                itemColor.PerformClick();
            }
            private ColorCellsControl CellsControl { get { return ((ColorCellsControl)tabControl.TabPages[0].Controls[0]); } }
            private string CustomColorsName { get { return "CustomColors"; } }
            public Color ResultColor { get { return fResultColor; } }            private Size CalcFormSize()
            {
                Size size = ColorCellsControlViewInfo.BestSize;
                size.Height = 113;
                return tabControl.CalcSizeByPageClient(size);
            }
        }
这个是Dev的，基本思路是点击下拉按钮（不知道自带的工具条有没有），弹出下拉颜色选择窗体，选择完毕后，修改对应的图标，在其下方画一条相应颜色条。

Answer 2

谢谢回复，不知道word是怎样实现这个功能的！

Answer 3

解决了，当选择颜色后根据选择的颜色在按钮的Paint事件里画一条颜色线段即可。不知道Word是不是这样做的！