Winform中自定义添加ZedGraph右键实现设置所有Y轴刻度的上下限

水深无声 2023-10-08 09:36 17阅读 0赞

## 场景 ##

Winforn中实现ZedGraph自定义添加右键菜单项(附源码下载)：

[https://blog.csdn.net/BADAO\_LIUMANG\_QIZHI/article/details/100140716][https_blog.csdn.net_BADAO_LIUMANG_QIZHI_article_details_100140716]

Winform中实现ZedGraph中曲线右键显示为中文：

[https://blog.csdn.net/BADAO\_LIUMANG\_QIZHI/article/details/100115292][https_blog.csdn.net_BADAO_LIUMANG_QIZHI_article_details_100115292]

在上面两篇文章的基础上，已经实现的ZedGraph的右键效果

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0JBREFPX0xJVU1BTkdfUUlaSEk_size_16_color_FFFFFF_t_70][]

现在需要根据当前图形的Y轴的选项自动追加右键菜单，打开设置Y轴上下限的输入面板，进而设置Y轴的上下限。

比如当曲线图有两个Y轴，那么在右键时就会显示两个设置上下限的菜单。

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0JBREFPX0xJVU1BTkdfUUlaSEk_size_16_color_FFFFFF_t_70 1][]

点击相应的右键菜单时弹出设置上下限的窗口

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0JBREFPX0xJVU1BTkdfUUlaSEk_size_16_color_FFFFFF_t_70 2][]

将上限设置为150之后

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0JBREFPX0xJVU1BTkdfUUlaSEk_size_16_color_FFFFFF_t_70 3][]

注：

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## 实现 ##

在初始化ZedGraph的图形方法中绑定其右键菜单事件

zgc.ContextMenuBuilder -= zgc_ContextMenuBuilder;     //上下文菜单生成事件订阅
    zgc.ContextMenuBuilder += zgc_ContextMenuBuilder;     //上下文菜单生成事件订阅

然后在右键菜单事件中

private static void zgc_ContextMenuBuilder(ZedGraphControl control, ContextMenuStrip menuStrip, Point mousePt, ZedGraphControl.ContextMenuObjectState
    
    objState)
            {
                #region 扩展上下文菜单
    
                #region 设置上下限菜单
    
                ToolStripMenuItem mnuYAxisUpLower = null;
                for (int i = 0; i < control.GraphPane.YAxisList.Count; i++)
                {
                    YAxis yAxis = control.GraphPane.YAxisList[i];
                    mnuYAxisUpLower = new ToolStripMenuItem();
                    mnuYAxisUpLower.Name = "mnuYAxisUpLower" + i;
                    mnuYAxisUpLower.Text = String.Format("设置[{0}]上下限", yAxis.Title.Text);
                    mnuYAxisUpLower.Click += delegate(object sender, EventArgs e)
                    {
                        Dialog.FrmSetScaleMaxMin frmSetScaleMaxMin = new FrmSetScaleMaxMin(mnuYAxisUpLower.Text, yAxis.Scale.Max, yAxis.Scale.Min);
                        DialogResult result = frmSetScaleMaxMin.ShowDialog();
                        if (result == DialogResult.OK)
                        {
                            yAxis.Scale.Max = frmSetScaleMaxMin.Max;
                            yAxis.Scale.Min = frmSetScaleMaxMin.Min;
                            //更改上下限后刷新曲线图
                            control.AxisChange();
                            control.Refresh();
                            control.Invalidate();
                        }
                    };
                    menuStrip.Items.Add(mnuYAxisUpLower);
                }
                #endregion
    
                #endregion
    
                #region 汉化上下文菜单中的菜单项
    
                foreach (ToolStripMenuItem item in menuStrip.Items)
                {
                    switch (item.Name)
                    {
                        case "copied_to_clip":
                            item.Text = @"复制到剪贴板";
                            break;
                        case "copy":
                            item.Text = @"复制";
                            item.Click += item_Click;
                            break;
                        case "page_setup":
                            item.Text = @"页面设置...";
                            break;
                        case "print":
                            item.Text = @"打印...";
                            break;
                        case "save_as":
                            item.Text = @"另存图表...";
                            break;
                        case "set_default":
                            item.Text = @"恢复默认大小";
                            break;
                        case "show_val":
                            item.Text = @"显示节点数值";
                            break;
                        case "title_def":
                            item.Text = @"标题";
                            break;
                        case "undo_all":
                            item.Text = @"还原所有缩放";
                            break;
                        case "unpan":
                            item.Text = @"还原上一步缩放";
                            break;
                        case "unzoom":
                            item.Text = @"还原缩放";
                            break;
                      
                    }
                }
    
                #endregion
            }

上面代码包含了汉化右键菜单的代码，主要的是上面扩展右键菜单的代码部分

ToolStripMenuItem mnuYAxisUpLower = null;
                for (int i = 0; i < control.GraphPane.YAxisList.Count; i++)
                {
                    YAxis yAxis = control.GraphPane.YAxisList[i];
                    mnuYAxisUpLower = new ToolStripMenuItem();
                    mnuYAxisUpLower.Name = "mnuYAxisUpLower" + i;
                    mnuYAxisUpLower.Text = String.Format("设置[{0}]上下限", yAxis.Title.Text);
                    mnuYAxisUpLower.Click += delegate(object sender, EventArgs e)
                    {
                        Dialog.FrmSetScaleMaxMin frmSetScaleMaxMin = new FrmSetScaleMaxMin(mnuYAxisUpLower.Text, yAxis.Scale.Max, yAxis.Scale.Min);
                        DialogResult result = frmSetScaleMaxMin.ShowDialog();
                        if (result == DialogResult.OK)
                        {
                            yAxis.Scale.Max = frmSetScaleMaxMin.Max;
                            yAxis.Scale.Min = frmSetScaleMaxMin.Min;
                            //更改上下限后刷新曲线图
                            control.AxisChange();
                            control.Refresh();
                            control.Invalidate();
                        }
                    };
                    menuStrip.Items.Add(mnuYAxisUpLower);
                }

注：

首先循环所有的Y轴，并通过YAxis yAxis = control.GraphPane.YAxisList\[i\]获取Y轴对象。然后设置菜单选项的名称、文本和点击事件。

在点击事件中弹出设置上下限窗口

窗口布局设置如下

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0JBREFPX0xJVU1BTkdfUUlaSEk_size_16_color_FFFFFF_t_70 4][]

然后修改窗体代码为

public partial class FrmSetScaleMaxMin : DevExpress.XtraEditors.XtraForm
        {
            #region 字段定义
    
            private string _title = String.Empty;       //保存要设置的坐标标题
            private double _orignalMax = 0.0;           //保存原坐标上限
            private double _orignalMin = 0.0;           //保存原坐标下限
    
            #endregion
    
            #region 构造方法
    
            public FrmSetScaleMaxMin(string title, double orignalMax, double orignalMin)
            {
                this._title = title;
                this._orignalMax = orignalMax;
                this._orignalMin = orignalMin;
                InitializeComponent();
            }
    
            #endregion
    
            #region 属性定义
    
            /// <summary>
            /// 设置后的坐标上限
            /// </summary>
            public double Max
            {
                get
                {
                    double value = 0.0;
                    double.TryParse(this.txtMax.EditValue.ToString(), out value);
                    return value;
                }
            }
    
            /// <summary>
            /// 设置后的坐标下限
            /// </summary>
            public double Min
            {
                get
                {
                    double value = 0.0;
                    double.TryParse(this.txtMin.EditValue.ToString(), out value);
                    return value;
                }
            }
    
            #endregion
    
            #region 事件处理
    
            /// <summary>
            /// 窗体加载
            /// </summary>
            /// <param name="sender"></param>
            /// <param name="e"></param>
            private void FrmSetScaleMaxMin_Load(object sender, EventArgs e)
            {
                this.Text = this._title;
                this.txtMax.EditValue = this._orignalMax;
                this.txtMin.EditValue = this._orignalMin;
            }
    
            /// <summary>
            /// 确定
            /// </summary>
            /// <param name="sender"></param>
            /// <param name="e"></param>
            private void btnOK_Click(object sender, EventArgs e)
            {
    
                this.DialogResult = System.Windows.Forms.DialogResult.OK;
            }
    
            /// <summary>
            /// 取消
            /// </summary>
            /// <param name="sender"></param>
            /// <param name="e"></param>
            private void btnCancel_Click(object sender, EventArgs e)
            {
                this.DialogResult = System.Windows.Forms.DialogResult.Cancel;
            }
    
            #endregion
    
        }

点击确定后返回结果并设置Y轴刻度的最大和最小值，然后刷新曲线图。

最后将此右键菜单项添加到右键中去。

[https_blog.csdn.net_BADAO_LIUMANG_QIZHI_article_details_100140716]: https://blog.csdn.net/BADAO_LIUMANG_QIZHI/article/details/100140716
[https_blog.csdn.net_BADAO_LIUMANG_QIZHI_article_details_100115292]: https://blog.csdn.net/BADAO_LIUMANG_QIZHI/article/details/100115292
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[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0JBREFPX0xJVU1BTkdfUUlaSEk_size_16_color_FFFFFF_t_70 2]: https://img-blog.csdnimg.cn/2019111510144977.jpg?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0JBREFPX0xJVU1BTkdfUUlaSEk=,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0JBREFPX0xJVU1BTkdfUUlaSEk_size_16_color_FFFFFF_t_70 3]: https://img-blog.csdnimg.cn/20191115101457194.jpg?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0JBREFPX0xJVU1BTkdfUUlaSEk=,size_16,color_FFFFFF,t_70
[https_blog.csdn.net_badao_liumang_qizhi]: https://blog.csdn.net/badao_liumang_qizhi
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0JBREFPX0xJVU1BTkdfUUlaSEk_size_16_color_FFFFFF_t_70 4]: https://img-blog.csdnimg.cn/20191115101548759.jpg?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0JBREFPX0xJVU1BTkdfUUlaSEk=,size_16,color_FFFFFF,t_70