NumericOperations: zooming too far into DateTime axes throws exception

[kareem469]

Need to have Zoom-in & Zoom-out functionality to happen / be managed in Button click options:

ScottPlot Version: 5.0.34

By default, whatever zooming functionality is happening in mouse events, that functionality needs to happen / be managed in button click option (i.e., +, -)

I tried the following code, but it works only when buttons are used for zooming. but when zoomed with mouse events and then used the button, it not working

double val = 1.0;

private void ZoomIn_Click(object sender, EventArgs e)
{
    
    if (val <= 3.5)
    {
        formsPlot1.Plot.Axes.Zoom(val, val);
        formsPlot1.Refresh();
        val = val + 0.1;
    }
}

private void ZoomOut_Click(object sender, EventArgs e)
{
    if (val > 1.1)
    {
        val = val - 0.1;
         formsPlot1.Plot.Axes.ZoomOut(val, val);
        formsPlot1.Refresh();
       
    }

}

[swharden]

Hi @kareem469, I may not understand the issue here.

Is your question "how do I enable + and - keys to zoom in and out"?

I tried the following code, but it works only when buttons are used for zooming. but when zoomed with mouse events and then used the button, it not working

This is the part I'm uncertain about

[kareem469]

Hi @swharden

My query is, I want to give provision to the user to use zoomin & zoom-out buttons instead of using mouse events (right & left clicks) for zooming functionality

[KennyTK]

Hi @kareem469,
formsPlot1.Plot.Axes.Zoom and formsPlot1.Plot.Axes.ZoomOut are two different functions with slightly different purposes. Could you try using only one or the other and testing?

[kareem469]

Hi @KennyTK

I required both zoomin & zoom out functionality in two different buttons.

And also I want to get the current zoom factor.

[kareem469]

Hi @swharden,

How to get the current zoom factor when zoomed in or out with default mouse events. So that i will use that zoom factor to zoom in or out functionality manually in buttons.

[swharden]

Hi @kareem469, please do not abuse the notification system by posting unnecessary messages (or using @ excessively, especially tagging GitHub users who are not even owners of this project)

I really appreciate KennyTK's suggestion in #3813 (comment) ❤️ I think that understanding of how Zoom() differs from ZoomOut() may help you arrive at a solution!

I will leave this issue open until I am able to share a code demonstration for how to zoom in and out with keyboard keys. However, note that I typically respond to messages from my phone so code examples are difficult, and when I am by a computer I prioritize high priority issues from oldest to newest, so it may take some time before I'm able to address all of these questions 👍

[kareem469]

While Zoomin button clicked continuously getting following exception

[swharden]

Hi @kareem469, thanks for reporting this! I'm going to rename this issue to track fixing this datetime-related bug