TabRenderer没有启用视觉样式？

Question

我想TabControl用自定义功能绘制自定义.

为此,我继承了Panel类并重写了OnPaint方法以使用TabRenderer类进行绘制.

问题是TabRenderer只有在启用视觉样式(可以检查TabRenderer.IsSupported)时才能工作,但如果禁用了视觉样式,我该怎么办？

在这种情况下,我想使用ControlPaint类来绘制没有视觉样式的选项卡,但它没有与Tabs相关的绘制方法.我希望它基本上像常规一样在视觉上表现TabControl.

Answer 1

你必须自己绘制它,因为没有为此发布API.希望以非视觉方式进行此操作相对容易.

您可以使用ControlPaint.DrawBorder3D绘制窗格边框,并使用类似以下代码的按钮:

int Top = bounds.Top;
int Bottom = bounds.Bottom - 1;
int Sign = 1;

if (tabStrip.EffectiveOrientation == TabOrientation.Bottom)
{
    Top = bounds.Bottom - 1;
    Bottom = bounds.Top;
    Sign = -1;
}

using (Pen OuterLightBorderPen = new Pen(SystemColors.ControlLightLight))
{
    e.Graphics.DrawLine(OuterLightBorderPen, bounds.Left, Bottom, bounds.Left, Top + 2 * Sign);
    e.Graphics.DrawLine(OuterLightBorderPen, bounds.Left, Top + 2 * Sign, bounds.Left + 2, Top);
    e.Graphics.DrawLine(OuterLightBorderPen, bounds.Left + 2, Top, bounds.Right - 3, Top);
}

using (Pen InnerLightBorderPen = new Pen(SystemColors.ControlLight))
{
    e.Graphics.DrawLine(InnerLightBorderPen, bounds.Left + 1, Bottom, bounds.Left + 1, Top + 2 * Sign);
    e.Graphics.DrawLine(InnerLightBorderPen, bounds.Left + 2, Top + 1 * Sign, bounds.Right - 3, Top + 1 * Sign);
}

using (Pen OuterDarkBorderPen = new Pen(SystemColors.ControlDarkDark))
{
    e.Graphics.DrawLine(OuterDarkBorderPen, bounds.Right - 2, Top + 1 * Sign, bounds.Right - 1, Top + 2 * Sign);
    e.Graphics.DrawLine(OuterDarkBorderPen, bounds.Right - 1, Top + 2 * Sign, bounds.Right - 1, Bottom);
}

using (Pen InnerDarkBorderPen = new Pen(SystemColors.ControlDark))
    e.Graphics.DrawLine(InnerDarkBorderPen, bounds.Right - 2, Top + 2 * Sign, bounds.Right - 2, Bottom);