private static void ChartContext_Opening(object sender, CancelEventArgs e)
{
ContextMenuStrip menuStrip = (ContextMenuStrip)sender;
Chart senderChart = (Chart)menuStrip.SourceControl;
ChartData ptrData = ChartTool[senderChart];
//Check Zoomed state
if (senderChart.ChartAreas[0].AxisX.ScaleView.IsZoomed ||
senderChart.ChartAreas[0].AxisY.ScaleView.IsZoomed ||
senderChart.ChartAreas[0].AxisY2.ScaleView.IsZoomed)
{
ptrData.ChartToolZoomOut.Visible = true;
ptrData.ChartToolZoomOutSeparator.Visible = true;
}
else
{
ptrData.ChartToolZoomOut.Visible = false;
ptrData.ChartToolZoomOutSeparator.Visible = false;
}
//Get Chart Control State
if (!ChartTool.ContainsKey(senderChart))
{
//Initialize Chart Tool
SetChartControlState(senderChart, MSChartExtensionToolState.Select);
}
//Update menu based on current state.
ptrData.ChartToolSelect.Checked = false;
ptrData.ChartToolZoom.Checked = false;
ptrData.ChartToolPan.Checked = false;
switch (ChartTool[senderChart].ToolState)
{
case MSChartExtensionToolState.Select:
ptrData.ChartToolSelect.Checked = true;
break;
case MSChartExtensionToolState.Zoom:
ptrData.ChartToolZoom.Checked = true;
break;
case MSChartExtensionToolState.Pan:
ptrData.ChartToolPan.Checked = true;
break;
}
//Update series
for (int x = 0; x < menuStrip.Items.Count; x++)
{
if (menuStrip.Items[x].Tag != null)
{
if (menuStrip.Items[x].Tag.ToString() == "Series")
{
menuStrip.Items.RemoveAt(x);
x--;
}
}
}
SeriesCollection chartSeries = ((Chart)menuStrip.SourceControl).Series;
foreach (Series ptrSeries in chartSeries)
{
ToolStripItem ptrItem = menuStrip.Items.Add(ptrSeries.Name);
ToolStripMenuItem ptrMenuItem = (ToolStripMenuItem)ptrItem;
ptrMenuItem.Checked = ptrSeries.Enabled;
ptrItem.Tag = "Series";
}
}
/// <summary>
/// Enable Zoom and Pan Controls.
/// </summary>
/// <param name="sender">The sender.</param>
/// <param name="selectionChanged">Selection changed callabck. Triggered when user select a point with selec tool.</param>
/// <param name="cursorMoved">Cursor moved callabck. Triggered when user move the mouse in chart area.</param>
/// <param name="zoomChanged">Callback triggered when chart has
/// zoomed in or out (and on first painting of the chart).</param>
/// <remarks>Callback are optional (pass in null to ignore).</remarks>
public static void EnableZoomAndPanControls(this Chart sender,
CursorPositionChanged selectionChanged,
CursorPositionChanged cursorMoved,
ZoomChanged zoomChanged = null)
{
if (!ChartTool.ContainsKey(sender))
{
ChartTool[sender] = new ChartData(sender);
ChartData ptrChartData = ChartTool[sender];
ptrChartData.Backup();
ptrChartData.SelectionChangedCallback = selectionChanged;
ptrChartData.CursorMovedCallback = cursorMoved;
ptrChartData.ZoomChangedCallback = zoomChanged;
//Populate Context menu
Chart ptrChart = sender;
if (ptrChart.ContextMenuStrip == null)
{
//Context menu is empty, use ChartContextMenuStrip directly
ptrChart.ContextMenuStrip = new ContextMenuStrip();
ptrChart.ContextMenuStrip.Items.AddRange(ChartTool[ptrChart].MenuItems.ToArray());
}
else
{
//User assigned context menu to chart. Merge current menu with ChartContextMenuStrip.
ContextMenuStrip newMenu = new ContextMenuStrip();
newMenu.Items.AddRange(ChartTool[sender].MenuItems.ToArray());
foreach (object ptrItem in ChartTool[sender].ContextMenuStrip.Items)
{
if (ptrItem is ToolStripMenuItem)
{
newMenu.Items.Add(((ToolStripMenuItem)ptrItem).Clone());
}
else if (ptrItem is ToolStripSeparator)
{
newMenu.Items.Add(new ToolStripSeparator());
}
}
newMenu.Items.Add(new ToolStripSeparator());
ptrChart.ContextMenuStrip = newMenu;
ptrChart.ContextMenuStrip.AddHandlers(ChartTool[sender].ContextMenuStrip);
}
ptrChart.ContextMenuStrip.Opening += ChartContext_Opening;
ptrChart.ContextMenuStrip.ItemClicked += ChartContext_ItemClicked;
ptrChart.MouseDown += ChartControl_MouseDown;
ptrChart.MouseMove += ChartControl_MouseMove;
ptrChart.MouseUp += ChartControl_MouseUp;
ptrChart.PostPaint += ChartOnPostPaint; // Necessary to kickstart ZoomChanged callback
// The following is for testing out the built-in events.
// They don't seem to be as reliable as just handling mouse up/move/down
//ptrChart.CursorPositionChanging += (sender1, e) =>
// {
// // Changed event isn't triggered with any zoom or select operations! From looking at the Cursor.cs code, it seems to be a bug.
// // Changing event is raised twice, once for each cursor (X, Y)
// var axis = e.Axis;
// };
//ptrChart.SelectionRangeChanging += (o, args) =>
// {
// // Changed event isn't triggered with any zoom or select operations!
// // Neither is changed event... odd
// Console.WriteLine("SelectionRangeChanging raised " + args.ToString());
// var axis = args.Axis;
// var chartArea = args.ChartArea;
// };
//Override settings.
ChartArea ptrChartArea = ptrChart.ChartAreas[0];
ptrChartArea.CursorX.AutoScroll = false;
ptrChartArea.CursorX.Interval = 1e-06;
ptrChartArea.CursorY.AutoScroll = false;
ptrChartArea.CursorY.Interval = 1e-06;
ptrChartArea.AxisX.ScrollBar.Enabled = false;
ptrChartArea.AxisX2.ScrollBar.Enabled = false;
ptrChartArea.AxisY.ScrollBar.Enabled = false;
ptrChartArea.AxisY2.ScrollBar.Enabled = false;
SetChartControlState(sender, MSChartExtensionToolState.Select);
}
}
/// <summary>
/// Enable Zoom and Pan Controls.
/// </summary>
/// <param name="sender">The sender.</param>
/// <param name="selectionChanged">Selection changed callabck. Triggered when user select a point with selec tool.</param>
/// <param name="cursorMoved">Cursor moved callabck. Triggered when user move the mouse in chart area.</param>
/// <remarks>Callback are optional.</remarks>
public static void EnableZoomAndPanControls(this Chart sender,
CursorPositionChanged selectionChanged,
CursorPositionChanged cursorMoved)
{
if (!ChartTool.ContainsKey(sender))
{
ChartTool[sender] = new ChartData(sender);
ChartData ptrChartData = ChartTool[sender];
ptrChartData.Backup();
ptrChartData.SelectionChangedCallback = selectionChanged;
ptrChartData.CursorMovedCallback = cursorMoved;
//Populate Context menu
Chart ptrChart = sender;
if (ptrChart.ContextMenuStrip == null)
{
//Context menu is empty, use ChartContextMenuStrip directly
ptrChart.ContextMenuStrip = new ContextMenuStrip();
ptrChart.ContextMenuStrip.Items.AddRange(ChartTool[ptrChart].MenuItems.ToArray());
}
else
{
//User assigned context menu to chart. Merge current menu with ChartContextMenuStrip.
ContextMenuStrip newMenu = new ContextMenuStrip();
newMenu.Items.AddRange(ChartTool[sender].MenuItems.ToArray());
foreach (object ptrItem in ChartTool[sender].ContextMenuStrip.Items)
{
if (ptrItem is ToolStripMenuItem)
{
newMenu.Items.Add(((ToolStripMenuItem)ptrItem).Clone());
}
else if (ptrItem is ToolStripSeparator)
{
newMenu.Items.Add(new ToolStripSeparator());
}
}
newMenu.Items.Add(new ToolStripSeparator());
ptrChart.ContextMenuStrip = newMenu;
ptrChart.ContextMenuStrip.AddHandlers(ChartTool[sender].ContextMenuStrip);
}
ptrChart.ContextMenuStrip.Opening += ChartContext_Opening;
ptrChart.ContextMenuStrip.ItemClicked += ChartContext_ItemClicked;
ptrChart.MouseDown += ChartControl_MouseDown;
ptrChart.MouseMove += ChartControl_MouseMove;
ptrChart.MouseUp += ChartControl_MouseUp;
ptrChart.KeyDown += ChartControl_KeyDown;
//Override settings.
ChartArea ptrChartArea = ptrChart.ChartAreas[0];
ptrChartArea.CursorX.AutoScroll = false;
ptrChartArea.CursorX.Interval = 1e-06;
ptrChartArea.CursorY.AutoScroll = false;
ptrChartArea.CursorY.Interval = 1e-06;
ptrChartArea.AxisX.ScrollBar.Enabled = false;
ptrChartArea.AxisX2.ScrollBar.Enabled = false;
ptrChartArea.AxisY.ScrollBar.Enabled = false;
ptrChartArea.AxisY2.ScrollBar.Enabled = false;
SetChartControlState(sender, MSChartExtensionToolState.Select);
}
}
private static void ChartControl_MouseUp(object sender, MouseEventArgs e)
{
if (e.Button != System.Windows.Forms.MouseButtons.Left)
{
return;
}
MouseDowned = false;
Chart ptrChart = (Chart)sender;
ChartArea ptrChartArea = ptrChart.ChartAreas[0];
ChartData data = GetDataForChart(ptrChart);
MSChartExtensionToolState state = data.ToolState;
switch (state)
{
case MSChartExtensionToolState.Zoom:
case MSChartExtensionToolState.ZoomX:
//Zoom area (Pixel)
double XStart = ptrChartArea.CursorX.SelectionStart;
double XEnd = ptrChartArea.CursorX.SelectionEnd;
double YStart = ptrChartArea.CursorY.SelectionStart;
double YEnd = ptrChartArea.CursorY.SelectionEnd;
if ((XStart == XEnd) && (YStart == YEnd))
{
return;
}
//Zoom area for X Axis
double left = Math.Min(XStart, XEnd);
double right = Math.Max(XStart, XEnd);
double XMin = ptrChartArea.AxisX.ValueToPosition(left);
double XMax = ptrChartArea.AxisX.ValueToPosition(right);
//Zoom area for Y Axis
double bottom = Math.Min(YStart, YEnd);
double top = Math.Max(YStart, YEnd);
double YMin = ptrChartArea.AxisY.ValueToPosition(bottom);
double YMax = ptrChartArea.AxisY.ValueToPosition(top);
// NOTE: left <= right, even if Axis.IsReversed
//X-Axis
ptrChartArea.AxisX.ScaleView.Zoom(left, right);
ptrChartArea.AxisX2.ScaleView.Zoom(
ptrChartArea.AxisX2.PositionToValue(XMin),
ptrChartArea.AxisX2.PositionToValue(XMax));
//Y-Axis
if (state == MSChartExtensionToolState.Zoom)
{
ptrChartArea.AxisY.ScaleView.Zoom(bottom, top);
ptrChartArea.AxisY2.ScaleView.Zoom(
ptrChartArea.AxisY2.PositionToValue(YMin),
ptrChartArea.AxisY2.PositionToValue(YMax));
}
//Clear selection (the following seem to be equivalent)
ptrChartArea.CursorX.SetSelectionPosition(0, 0);
ptrChartArea.CursorY.SetSelectionPosition(0, 0);
//ptrChartArea.CursorX.SelectionStart = ptrChartArea.CursorX.SelectionEnd;
//ptrChartArea.CursorY.SelectionStart = ptrChartArea.CursorY.SelectionEnd;
//NOTE: At this point, the scaled view has already been updated to reflect zoom
OnZoomChanged(ptrChart);
break;
case MSChartExtensionToolState.Pan:
break;
}
}
