C#选项卡旋转文本

时间:2016-02-25 22:51:15

标签: c# tabs drawstring rotatetransform

我在选项卡上旋转文本时遇到一些问题。选项卡最初工作得很好,但是我想在选中时加粗文本,所以我使用了Draw Item Event。我添加了一个RotateTransform和一个TranslateTransform,但它不起作用。该文本并没有显示出来。我遇到了麻烦,如果我将旋转移开,文本是可见的,但是当我使用旋转使文本垂直时,它会消失。这是我的代码:

    private void tabControl1_DrawItem(object sender, DrawItemEventArgs e)
    {
        Graphics g = e.Graphics;
        string tabText = tabControl1.TabPages[e.Index].Text;
        SizeF textSize = g.MeasureString(tabText, tabControl1.Font);
        Brush _textBrush = Brushes.Black;
        TabPage _tabPage = tabControl1.TabPages[e.Index];
        System.Drawing.Rectangle _tabBounds = tabControl1.GetTabRect(e.Index);
        StringFormat _stringFlags = new StringFormat();
        _stringFlags.Alignment = StringAlignment.Center;
        _stringFlags.LineAlignment = StringAlignment.Center; 

        PointF tabPt = new PointF(_tabBounds.Left+(_tabBounds.Width), _tabBounds.Top+(_tabBounds.Height));

        if (e.Index == tabControl1.SelectedIndex)
        {
            g.RotateTransform(-90);
            g.TranslateTransform(tabPt.X, tabPt.Y);

            g.DrawString(tabControl1.TabPages[e.Index].Text,
                new Font(tabControl1.Font, FontStyle.Bold),
                _textBrush,
                new PointF(tabPt.X, tabPt.Y));
            g.ResetTransform();
        }
        else
        {
            g.TranslateTransform(tabPt.X, tabPt.Y);                
           g.RotateTransform(-90);

            g.DrawString(tabControl1.TabPages[e.Index].Text,
                tabControl1.Font,
                _textBrush,
                new PointF(tabPt.X,tabPt.Y));
            g.ResetTransform();
        }
    }
}

非常感谢任何帮助。

修改 这是图像:

enter image description here

这是新代码:

        Graphics g = e.Graphics;
        string tabText = tabControl1.TabPages[e.Index].Text;
        SizeF textSize = g.MeasureString(tabText, tabControl1.Font);
        Brush _textBrush = Brushes.Black;
        TabPage _tabPage = tabControl1.TabPages[e.Index];
        System.Drawing.Rectangle _tabBounds = tabControl1.GetTabRect(e.Index);
        PointF rotPt = new PointF(_tabBounds.Left + (_tabBounds.Width / 2) - (2.75F), _tabBounds.Top + (_tabBounds.Height / 2) + (textSize.Width/2));
        PointF tabPt = new PointF(_tabBounds.Left + (_tabBounds.Width / 2) - (2.75F), _tabBounds.Top + (_tabBounds.Height / 2) + (textSize.Width)/2);
        if (e.Index == tabControl1.SelectedIndex)
        {
            g.TranslateTransform(rotPt.X, rotPt.Y);
            g.RotateTransform(-90);
            g.TranslateTransform(-(rotPt.X), -(rotPt.Y));

            g.DrawString(tabText,
                new Font(tabControl1.Font, FontStyle.Bold),
                _textBrush,
                new PointF(rotPt.X, rotPt.Y));
        }
        else
        {
            g.TranslateTransform(rotPt.X, rotPt.Y);
            g.RotateTransform(-90);
            g.TranslateTransform(-rotPt.X, -rotPt.Y);

            g.DrawString(tabText,
                tabControl1.Font,
                _textBrush,
                new PointF(rotPt.X,rotPt.Y));
        }

1 个答案:

答案 0 :(得分:1)

感谢TaW的帮助。这是最终的代码及其工作原理。

   public form1()
    {
        InitializeComponent();            
        tabControl1.DrawMode = TabDrawMode.OwnerDrawFixed;
        tabControl1.DrawItem += new DrawItemEventHandler(tabControl1_DrawItem);
    }

private void tabControl1_DrawItem(object sender,DrawItemEventArgs e)

    {
        Graphics g = e.Graphics;
        string tabText = tabControl1.TabPages[e.Index].Text;
        SizeF textSize = g.MeasureString(tabText, tabControl1.Font);
        Brush _textBrush = Brushes.Black;
        TabPage _tabPage = tabControl1.TabPages[e.Index];
        System.Drawing.Rectangle _tabBounds = tabControl1.GetTabRect(e.Index);
        PointF rotPt = new PointF(_tabBounds.Left + (_tabBounds.Width / 2) - (textSize.Height / 2), _tabBounds.Top + (_tabBounds.Height / 2) + (textSize.Width/2));

        if (e.State.HasFlag(DrawItemState.Selected))
        {
            g.TranslateTransform(rotPt.X, rotPt.Y);
            g.RotateTransform(-90);
            g.TranslateTransform(-(rotPt.X), -(rotPt.Y));

            g.DrawString(tabText,
                new Font(tabControl1.Font, FontStyle.Bold),
                _textBrush,
                new PointF(rotPt.X, rotPt.Y));
            g.ResetTransform();
        }

        else
        {
            g.TranslateTransform(rotPt.X, rotPt.Y);
            g.RotateTransform(-90);
            g.TranslateTransform(-rotPt.X, -rotPt.Y);

            g.DrawString(tabText,
                tabControl1.Font,
                _textBrush,
                new PointF(rotPt.X,rotPt.Y));
            g.ResetTransform();
        }
    }

P.S。我从来没有得过e.Bounds而不是GetTabRect(我不知道如何将它设置为选定的标签)。