ToolTip美化扩展----------WinForm控件开发系列

该控件是继承于 ToolTip 基类开发的。

ToolAnchor  属性可以设置提示框位置。

TitleStation  属性可以设置提示窗体标题位置。

        private void ToolTipExt_Popup(object sender, PopupEventArgs e)
        {
            e.ToolTipSize = this.GetToolTipSize(e.AssociatedControl);
        }

        private void ToolTipExt_Draw(object sender, DrawToolTipEventArgs e)
        {
            #region 背景

            SolidBrush back_sb = new SolidBrush(this.BackColor);
            e.Graphics.FillRectangle(back_sb, e.Bounds);
            back_sb.Dispose();

            #endregion

            #region 标题

            Rectangle titleback_rect = new Rectangle();
            if (this.TitleShow)
            {
                StringFormat title_sf = new StringFormat();
                if (this.TitleStation == TitleAnchor.Left || this.TitleStation == TitleAnchor.Right)
                    title_sf.FormatFlags = StringFormatFlags.DirectionVertical;
                Size title_size = e.Graphics.MeasureString(this.ToolTipTitle, this.TitleFont, 0, title_sf).ToSize();


                Rectangle title_rect = new Rectangle();
                if (this.TitleStation == TitleAnchor.Top)
                {
                    titleback_rect = new Rectangle(e.Bounds.X, e.Bounds.Y, e.Bounds.Width, this.TitleHeight);
                    title_rect = new Rectangle(titleback_rect.X + this.Padding, titleback_rect.Y + (titleback_rect.Height - title_size.Height) / 2, titleback_rect.Width - this.Padding * 2, titleback_rect.Height - this.Padding * 2);
                }
                else if (this.TitleStation == TitleAnchor.Bottom)
                {
                    titleback_rect = new Rectangle(e.Bounds.X, e.Bounds.Bottom - this.TitleHeight, e.Bounds.Width, this.TitleHeight);
                    title_rect = new Rectangle(titleback_rect.X + this.Padding, e.Bounds.Bottom - titleback_rect.Height + (titleback_rect.Height - title_size.Height) / 2, titleback_rect.Width - this.Padding * 2, titleback_rect.Height - this.Padding * 2);
                }
                else if (this.TitleStation == TitleAnchor.Left)
                {
                    titleback_rect = new Rectangle(e.Bounds.X, e.Bounds.Y, this.TitleHeight, e.Bounds.Height);
                    title_rect = new Rectangle(titleback_rect.X + (titleback_rect.Width - title_size.Width) / 2, titleback_rect.Y + this.Padding, titleback_rect.Width - this.Padding * 2, titleback_rect.Height - this.Padding * 2);
                }
                else if (this.TitleStation == TitleAnchor.Right)
                {
                    titleback_rect = new Rectangle(e.Bounds.Right - this.TitleHeight, e.Bounds.Y, this.TitleHeight, e.Bounds.Height);
                    title_rect = new Rectangle(titleback_rect.Right - titleback_rect.Width + (titleback_rect.Width - title_size.Width) / 2, titleback_rect.Y + this.Padding, titleback_rect.Width - this.Padding * 2, titleback_rect.Height - this.Padding * 2);
                }

                if (this.TitleBackColor != Color.Empty)
                {
                    SolidBrush titleback_sb = new SolidBrush(this.TitleBackColor);
                    e.Graphics.FillRectangle(titleback_sb, titleback_rect);
                    titleback_sb.Dispose();
                }

                SolidBrush title_sb = new SolidBrush(this.TitleColor);
                e.Graphics.DrawString(this.ToolTipTitle, this.TitleFont, title_sb, title_rect, title_sf);
                title_sb.Dispose();
                title_sf.Dispose();
            }

            #endregion

            #region 内容

            Size text_size = e.Graphics.MeasureString(e.ToolTipText, this.Font, new Size()).ToSize();
            Rectangle text_rect = new Rectangle();
            if (this.TitleStation == TitleAnchor.Top)
            {
                text_rect = new Rectangle(e.Bounds.X + this.Padding, titleback_rect.Bottom + this.Padding, e.Bounds.Width, e.Bounds.Height - titleback_rect.Height);
            }
            else if (this.TitleStation == TitleAnchor.Bottom)
            {
                text_rect = new Rectangle(e.Bounds.X + this.Padding, e.Bounds.Y + this.Padding, e.Bounds.Width, e.Bounds.Height - titleback_rect.Height);
            }
            else if (this.TitleStation == TitleAnchor.Left)
            {
                text_rect = new Rectangle(e.Bounds.X + titleback_rect.Width + this.Padding, e.Bounds.Y + this.Padding, e.Bounds.Width, e.Bounds.Height - titleback_rect.Height);
            }
            else if (this.TitleStation == TitleAnchor.Right)
            {
                text_rect = new Rectangle(e.Bounds.X + this.Padding, e.Bounds.Y + this.Padding, e.Bounds.Width, e.Bounds.Height - titleback_rect.Height);
            }

            SolidBrush text_sb = new SolidBrush(this.ForeColor);
            e.Graphics.DrawString(e.ToolTipText, this.Font, text_sb, text_rect);
            text_sb.Dispose();

            #endregion

        }

        /// <summary>
        /// 通过文本计算工具提示大小(text为null时根据control的文本计算)
        /// </summary>
        /// <param name="control">要为其检索 System.Windows.Forms.ToolTip 文本的 System.Windows.Forms.Control。</param>
        /// <param name="text">要计算的文本</param>
        /// <returns></returns>
        private Size GetToolTipSize(Control control, string text = null)
        {
            Graphics g = control.CreateGraphics();
            string text_str = text == null ? this.GetToolTip(control) : text;
            Size text_size = g.MeasureString(text_str, this.Font, new Size()).ToSize();
            text_size.Width += this.Padding * 2;
            text_size.Height += this.Padding * 2;

            if (this.MinSize.Width > 0 && this.MinSize.Width > text_size.Width)
                text_size.Width = this.MinSize.Width;
            if (this.MinSize.Height > 0 && this.MinSize.Height > text_size.Height)
                text_size.Height = this.MinSize.Height;

            if (this.MaxSize.Width > 0 && text_size.Width > this.MaxSize.Width)
                text_size.Width = this.MaxSize.Width;
            if (this.MaxSize.Height > 0 && text_size.Height > this.MaxSize.Height)
                text_size.Height = this.MaxSize.Height;

            if (this.TitleShow)
            {
                if (this.TitleStation == TitleAnchor.Top || this.TitleStation == TitleAnchor.Bottom)
                {
                    text_size.Height += this.TitleHeight;
                }
                else
                {
                    text_size.Width += this.TitleHeight;
                }
            }
            g.Dispose();
            return text_size;
        }

公开方法如下

控件库的源码已整体发布到gitee，下载地址：（花木兰控件库）https://gitee.com/tlmbem/hml