自定义Outlines分组样式

Spread for WinForms 6.0中提供了类似于Excel一样的Outlines分组显示方式，通过这种方式可以非常方便查看Spread中的数据，在Spread中提供了一种默认的显示风格，如下图所示：

不过有些时候，我们希望Spread的显示风格与您应用系统的显示风格保持一致，这时候我们就需要改变Spread中Outlines的显示样式，Spread也提供了这样的属性设置来改变Outlines的显示风格，比如通过下面的代码我们可以非常容易的实现自己的Outlines样式：

fpSpread1.ActiveSheet.Rows.Count = 11;

    fpSpread1.ActiveSheet.Columns.Count = 6;



    FarPoint.Win.Spread.EnhancedInterfaceRenderer outlinelook = new FarPoint.Win.Spread.EnhancedInterfaceRenderer();



    outlinelook.RangeGroupBackgroundColor = Color.LightGreen;

    outlinelook.RangeGroupButtonBorderColor = Color.Red;

    outlinelook.RangeGroupLineColor = Color.Blue;

    fpSpread1.InterfaceRenderer = outlinelook;



    fpSpread1.ActiveSheet.AddRangeGroup(0, 8, true);

    fpSpread1.ActiveSheet.AddRangeGroup(0, 5, true);

    fpSpread1.ActiveSheet.AddRangeGroup(1, 3, false);

    fpSpread1.ActiveSheet.AddRangeGroup(1, 2, false);

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实现的效果如下：

当然，有时候我们希望实现更灵活的自定义功能，比如需要显示自己的“+”“-”，这时候我们就可以实现FarPoint.Win.Spread.IInterfaceRenderer接口，然后自己实现Outlines相关的显示风格

public class MyEnhancedInterfaceRenderer : FarPoint.Win.Spread.IInterfaceRenderer

    {

        FarPoint.Win.Spread.EnhancedInterfaceRenderer enhR = new FarPoint.Win.Spread.EnhancedInterfaceRenderer();



        #region IInterfaceRenderer Members



        public void PaintRangeGroupButton(System.Drawing.Graphics g, int x, int y, int width, int height, FarPoint.Win.Spread.GroupState groupState, bool rowGroup, bool isLeftToRight)

        {

            // 在这里实现自定义Button的逻辑

            if (groupState == FarPoint.Win.Spread.GroupState.Expanded)

            {

                g.DrawIcon(new Icon("Icon/Minus.ico"), new Rectangle(x, y, width, height));

            }

            else if (groupState == FarPoint.Win.Spread.GroupState.Collapsed)

            {

                g.DrawIcon(new Icon("Icon/Plus.ico"), new Rectangle(x, y, width, height));

            }

            

            //enhR.PaintRangeGroupButton(g, x, y, width, height, groupState, rowGroup, isLeftToRight);

        }



        #endregion

    }

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最终效果：