I am facing a problem. I created an chart using the time scale, but when I hover the first chart value for example, it displays the first tooltip of with the first sries's value. See the following screenshot:
Related
The chart legend doesnt fit in the vizualization. Therefore, pbi just adds a button.
Example: Button circled in red.
There is a way to remove this button and add a breakline ? So it can just keep going below.
Thx.
Unfortunately, this is not possible. If you want more control over chart elements, I recommend using Deneb.
In chart.js, is it possible to change the color of a chart (theme) by clicking a button?
Let's say I have buttons named 'dark mode', 'light mode' when I click 'dark mode' button, the chart color changes to dark color.
I can't find any example of it by googling.
You can make a new chart or update your chart with the new colors in the options or in your dataset. There's no function with changes all colors to a dark mode, you have to change all colors on your own.
I can't give you all the possible color options, there's simply too many. Just look at the docs or maybe here for a few examples. You can for sure change e.g. all the dataset and background colors.
I have created a simple Bar Chart in Chart.JS and all looks good. I now need to add a text box to the chart with rounded corners such as in the example below
I have tried the annotation plugin, but that only seems to add boxes and lines, not text. I don't want to overwrite defaults as I have several charts on my page, and only this one is to contain the text.
Is this possible?
Thanks
I have a chart.js line chart displaying properly. When you hover over the y-axis gridlines, the tooltips display as they should.
I'm trying to convert this to function on a touchscreen, so there is no hover. Is there a way to add a simple parameter to make the tooltip show on both hover and onclick?
Note, I know I could add a custom tooltip and add all of that functionality - I'm trying to see if there's just a parameter I can add as I don't need a custom tooltip.
For Chart.js v2, you can specify those events at the root level of chart options.
options: {
events: ['click']
}
Just add "click" to your tooltipEvents list when specifying the options for the chart
...
tooltipEvents: ["mousemove", "touchstart", "touchmove", "click"],
});
In the fiddle below, I've removed all other events from the list except for click to give you an idea of how it will be like on a mobile
Fiddle - http://jsfiddle.net/8uobybv3/
For ChartJS version 2.8.0, you will need to add both the click and mouseout events to make the tooltip behave the desired way.
The click event would make the tooltip to appear when point is clicked and the mouseout event would hide the tooltip when the mouse pointer is moved outside of the chart canvas area which is the desired behavior.
Note: Without adding the mouseout event the tooltip would not hide even when the mouse is moved or clicked outside the chart canvas area.
Code:
options: {
events: ["click", "mouseout"],
....
...
I'd like to change the default style of the list-view control's tooltips to balloon.
I first called ListView_GetToolTips() to get the HWND of the list-view's tooltips control, and then used GetWindowLongPtr()/SetWindowLongPtr() to add the TTS_BALLOON style.
I handle LVN_GETINFOTIP to customize the tooltip for the items (first column) in the list-view: the tooltip texts that appear for the first column items are actually a copy of the text of the third column. The other columns (subitems) are managed automatically by the list-view.
The balloon-style tooltips for the first column items seem OK; their stems are correctly positioned:
But the tooltips for the second column seem drawn wrongly, e.g. the balloon is drawn as if it was referred to a subitem in a row below the actual row pointed by the mouse cursor.
In the following picture, the "star" indicates the position in which the mouse cursor was when the tooltip appeared, but the tooltip's stem points to a row below, marked with an ellipse:
The strange thing is that the tooltips for the third column seem drawn correctly.
Is this a bug in the list-view control? (I'm using Windows 7.)
Or what am I missing here?
The ListView uses a tracking tooltip and positions it to unfold and reveal the hidden text in a column that's too small. It's not expecting its tooltip to be a balloon and so doesn't compensate for that.
You'd need to sub-class the tooltip itself, watch for TTM_TRACKPOSITION messages from the ListView, and adjust the coordinates.
Your second question - the shaded background comes from the system theme. You should be able to get it by calling SetWindowTheme on the tooltip (I'm not sure why the ListView disables themes for the tip).