如何使用可拆分的单元格使TableLayoutPanel像使用Splitter [英] How to make TableLayoutPanel with resizable cells like using Splitter

问题描述

获得1列N行的TableLayoutPanel 单元之间需要使用诸如Splitter组件之类的东西来调整单元大小. 无需使用SplitContainer.

如果没有TableLayoutPanel，还有其他想法吗?

解决方案

这实际上取决于您要使用的功能:DataGridView带来了交互性，但是它的单元格既不是控件也不是容器./p>

您可以尝试该TableLayoutPanel子类是否满足您的要求:

public partial class SplitTablePanel : TableLayoutPanel
{
    public int SplitterSize { get; set; }

    int sizingRow = -1;
    int currentRow = -1;
    Point mdown = Point.Empty;
    int oldHeight = -1;
    bool isNormal = false;
    List<RectangleF> TlpRows = new List<RectangleF>();
    int[] rowHeights = new int[0];

    public SplitTablePanel()
    {
        InitializeComponent();
        this.MouseDown += SplitTablePanel_MouseDown;
        this.MouseMove += SplitTablePanel_MouseMove;
        this.MouseUp += SplitTablePanel_MouseUp;
        this.MouseLeave += SplitTablePanel_MouseLeave;
        SplitterSize = 6;
    }

    void SplitTablePanel_MouseLeave(object sender, EventArgs e)
    {
        Cursor = Cursors.Default;
    }


    void SplitTablePanel_MouseUp(object sender, MouseEventArgs e)
    {
        getRowRectangles(SplitterSize);
    }

    void SplitTablePanel_MouseMove(object sender, MouseEventArgs e)
    {
        if (!isNormal) nomalizeRowStyles();
        if (TlpRows.Count <= 0) getRowRectangles(SplitterSize);
        if (rowHeights.Length <= 0) rowHeights = GetRowHeights();

        if (e.Button == System.Windows.Forms.MouseButtons.Left)
        {
            if (sizingRow < 0) return;
            int newHeight = oldHeight + e.Y - mdown.Y;
            sizeRow(sizingRow, newHeight);
        }
        else
        {
            currentRow = -1;
            for (int i = 0; i < TlpRows.Count; i++)
                if (TlpRows[i].Contains(e.Location)) { currentRow = i; break;}
            Cursor = currentRow >= 0 ? Cursors.SizeNS : Cursors.Default;
        }
    }

    void SplitTablePanel_MouseDown(object sender, MouseEventArgs e)
    {
        mdown = Point.Empty;
        sizingRow = -1;
        if (currentRow < 0) return;
        sizingRow = currentRow;
        oldHeight = rowHeights[sizingRow];
        mdown = e.Location;
    }


    void getRowRectangles(float size)
    {   // get a list of mouse sensitive rectangles
        float sz = size / 2f;
        float y = 0f;
        int w = ClientSize.Width;
        int[] rw = GetRowHeights();

        TlpRows.Clear();
        for (int i = 0; i < rw.Length - 1; i++)
        {
            y += rw[i];
            TlpRows.Add(new RectangleF(0, y - sz, w, size));
        }

    }

    void sizeRow(int row, int newHeight)
    {   // change the height of one row
        if (newHeight == 0) return;
        if (sizingRow < 0) return;
        SuspendLayout();
        rowHeights = GetRowHeights();
        if (sizingRow >= rowHeights.Length) return;

        if (newHeight > 0) 
            RowStyles[sizingRow] = new RowStyle(SizeType.Absolute, newHeight);
        ResumeLayout();
        rowHeights = GetRowHeights();
        getRowRectangles(SplitterSize);
    }

    void nomalizeRowStyles()
    {   // set all rows to absolute and the last one to percent=100!
        if (rowHeights.Length <= 0) return;
        rowHeights = GetRowHeights();
        RowStyles.Clear();
        for (int i = 0; i < RowCount - 1; i++)
        {
            RowStyle cs = new RowStyle(SizeType.Absolute, rowHeights[i]);
            RowStyles.Add(cs);
        }
        RowStyles.Add ( new RowStyle(SizeType.Percent, 100) );
        isNormal = true;
    }
}
}

Got TableLayoutPanel with 1 column and N rows needed to cells be resizable with somthing like Splitter component between cells. without using SplitContainer.

May be any other idea without TableLayoutPanel?

解决方案

It really depends on what you want to do with it: A DataGridView brings with it the interactivity, but its cells are neither controls nor containers..

You can try if this TableLayoutPanel subclass does what you want:

public partial class SplitTablePanel : TableLayoutPanel
{
    public int SplitterSize { get; set; }

    int sizingRow = -1;
    int currentRow = -1;
    Point mdown = Point.Empty;
    int oldHeight = -1;
    bool isNormal = false;
    List<RectangleF> TlpRows = new List<RectangleF>();
    int[] rowHeights = new int[0];

    public SplitTablePanel()
    {
        InitializeComponent();
        this.MouseDown += SplitTablePanel_MouseDown;
        this.MouseMove += SplitTablePanel_MouseMove;
        this.MouseUp += SplitTablePanel_MouseUp;
        this.MouseLeave += SplitTablePanel_MouseLeave;
        SplitterSize = 6;
    }

    void SplitTablePanel_MouseLeave(object sender, EventArgs e)
    {
        Cursor = Cursors.Default;
    }


    void SplitTablePanel_MouseUp(object sender, MouseEventArgs e)
    {
        getRowRectangles(SplitterSize);
    }

    void SplitTablePanel_MouseMove(object sender, MouseEventArgs e)
    {
        if (!isNormal) nomalizeRowStyles();
        if (TlpRows.Count <= 0) getRowRectangles(SplitterSize);
        if (rowHeights.Length <= 0) rowHeights = GetRowHeights();

        if (e.Button == System.Windows.Forms.MouseButtons.Left)
        {
            if (sizingRow < 0) return;
            int newHeight = oldHeight + e.Y - mdown.Y;
            sizeRow(sizingRow, newHeight);
        }
        else
        {
            currentRow = -1;
            for (int i = 0; i < TlpRows.Count; i++)
                if (TlpRows[i].Contains(e.Location)) { currentRow = i; break;}
            Cursor = currentRow >= 0 ? Cursors.SizeNS : Cursors.Default;
        }
    }

    void SplitTablePanel_MouseDown(object sender, MouseEventArgs e)
    {
        mdown = Point.Empty;
        sizingRow = -1;
        if (currentRow < 0) return;
        sizingRow = currentRow;
        oldHeight = rowHeights[sizingRow];
        mdown = e.Location;
    }


    void getRowRectangles(float size)
    {   // get a list of mouse sensitive rectangles
        float sz = size / 2f;
        float y = 0f;
        int w = ClientSize.Width;
        int[] rw = GetRowHeights();

        TlpRows.Clear();
        for (int i = 0; i < rw.Length - 1; i++)
        {
            y += rw[i];
            TlpRows.Add(new RectangleF(0, y - sz, w, size));
        }

    }

    void sizeRow(int row, int newHeight)
    {   // change the height of one row
        if (newHeight == 0) return;
        if (sizingRow < 0) return;
        SuspendLayout();
        rowHeights = GetRowHeights();
        if (sizingRow >= rowHeights.Length) return;

        if (newHeight > 0) 
            RowStyles[sizingRow] = new RowStyle(SizeType.Absolute, newHeight);
        ResumeLayout();
        rowHeights = GetRowHeights();
        getRowRectangles(SplitterSize);
    }

    void nomalizeRowStyles()
    {   // set all rows to absolute and the last one to percent=100!
        if (rowHeights.Length <= 0) return;
        rowHeights = GetRowHeights();
        RowStyles.Clear();
        for (int i = 0; i < RowCount - 1; i++)
        {
            RowStyle cs = new RowStyle(SizeType.Absolute, rowHeights[i]);
            RowStyles.Add(cs);
        }
        RowStyles.Add ( new RowStyle(SizeType.Percent, 100) );
        isNormal = true;
    }
}
}

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