private void PbPlot_MouseWheel(object sender, MouseEventArgs e)
{
double zoomAmount = 0.15;
PointF zoomCenter = plt.CoordinateFromPixel(e.Location);
if (e.Delta > 0)
{
plt.AxisZoom(1 + zoomAmount, 1 + zoomAmount, zoomCenter);
}
else
{
plt.AxisZoom(1 - zoomAmount, 1 - zoomAmount, zoomCenter);
}
if (plt.mouseTracker.lowQualityWhileInteracting && plt.mouseTracker.mouseWheelHQRenderDelay > 0)
{
Render(false, true);
lastInteractionTimer.Interval = plt.mouseTracker.mouseWheelHQRenderDelay; // delay in ms
lastInteractionTimer.Start();
}
else
{
Render(skipIfCurrentlyRendering: false);
}
}
private void UserControl_MouseWheel(object sender, MouseWheelEventArgs e)
{
// note: AxisZoom's zoomCenter argument could be used to zoom to the cursor (see code in FormsPlot.cs).
// However, this requires some work and testing to ensure it works if DPI scaling is used too.
// Currently, scroll-wheel zooming simply zooms in and out of the center of the plot.
double zoomAmountY = 0.15;
double zoomAmountX = 0.15;
if (Keyboard.IsKeyDown(Key.LeftCtrl) || Keyboard.IsKeyDown(Key.RightCtrl))
{
zoomAmountY = 0;
}
if (Keyboard.IsKeyDown(Key.LeftAlt) || Keyboard.IsKeyDown(Key.RightAlt))
{
zoomAmountX = 0;
}
if (e.Delta > 1)
{
plt.AxisZoom(1 + zoomAmountX, 1 + zoomAmountY);
}
else
{
plt.AxisZoom(1 - zoomAmountX, 1 - zoomAmountY);
}
Render(skipIfCurrentlyRendering: false);
}
private void PbPlot_MouseWheel(object sender, MouseEventArgs e)
{
if (e.Delta > 0)
{
plt.AxisZoom(1.5, 1.5);
}
else
{
plt.AxisZoom(0.5, 0.5);
}
Render();
}
private void PbPlot_MouseWheel(object sender, MouseEventArgs e)
{
double zoomAmount = 0.15;
PointF zoomCenter = plt.CoordinateFromPixel(e.Location);
if (e.Delta > 0)
{
plt.AxisZoom(1 + zoomAmount, 1 + zoomAmount, zoomCenter);
}
else
{
plt.AxisZoom(1 - zoomAmount, 1 - zoomAmount, zoomCenter);
}
Render(skipIfCurrentlyRendering: false);
}
private void PbPlot_MouseWheel(object sender, MouseEventArgs e)
{
double xFrac = (e.Delta > 0) ? 1.15 : 0.85;
double yFrac = (e.Delta > 0) ? 1.15 : 0.85;
plt.AxisZoom(xFrac, yFrac, plt.CoordinateFromPixel(e.Location));
Render();
OnAxisChanged();
}
private void PbPlot_MouseWheel(object sender, MouseEventArgs e)
{
double xFrac = (e.Delta > 0) ? 1.15 : 0.85;
double yFrac = (e.Delta > 0) ? 1.15 : 0.85;
if (ModifierKeys.HasFlag(Keys.Control))
{
yFrac = 1;
}
if (ModifierKeys.HasFlag(Keys.Alt))
{
xFrac = 1;
}
plt.AxisZoom(xFrac, yFrac, plt.CoordinateFromPixel(e.Location));
Render();
OnAxisChanged();
}
private void PbPlot_MouseWheel(object sender, MouseEventArgs e)
{
double xFrac = (e.Delta > 0) ? 1.15 : 0.85;
double yFrac = (e.Delta > 0) ? 1.15 : 0.85;
if (isVerticalLocked)
{
yFrac = 1;
}
if (isHorizontalLocked)
{
xFrac = 1;
}
plt.AxisZoom(xFrac, yFrac, plt.CoordinateFromPixel(e.Location));
Render();
OnAxisChanged();
}
public void Test_Scatter_ZoomWorksWithOnePoint()
{
// Tests a bug where plots with a single point (axis span 0) can't zoom
// https://github.com/ScottPlot/ScottPlot/issues/768
double[] dataX = { 42 };
double[] dataY = { 303 };
// create a scatter plot with a single point
var plt = new ScottPlot.Plot(400, 300);
plt.AddScatter(dataX, dataY);
var bmp1 = TestTools.GetLowQualityBitmap(plt);
// zoom in
plt.AxisZoom(2, 2);
var bmp2 = TestTools.GetLowQualityBitmap(plt);
// ensure the bitmap changed
Assert.AreNotEqual(ScottPlot.Tools.BitmapHash(bmp1), ScottPlot.Tools.BitmapHash(bmp2));
}
