canvas tag

15 questions

1 answers
82 views
0

If you change the marker size dynamically while drawing the marker with canvas on the leaflet, the event decision will be misaligned.

Thank you for your help.If you click on the marker you want to display in the leaflet, a pop-up will be displayed.This marker is drawn in canvas and You can change the size dynamically.If you change t...

javascript html5-canvas leaflet

2 years ago

2 answers
101 views
0

Save the Canvas image to the camera roll

I'm making an application for smartphones with html5.I'm using Canvas to create an image in the app, and I don't know how to save the image to the iOS camera roll.(Drawing is done) Implementation of d...

javascript angularjs cordova html5-canvas

2 years ago

1 answers
107 views
0

scatter multiple images randomly within the canvas

We are currently working on an animation to make fallen leaves fall using the website below.I tried to make cherry blossoms fall in Canvas|Oto Co., Ltd.|Staff BlogI learned from the example on this si...

javascript html5-canvas

2 years ago

1 answers
99 views
0

Is it possible to use the canvas tag in HTML 4.01?

Is it possible to use the canvas tag in HTML 4.01?I was able to draw a graph using Chart.js in the following description, but I think the canvas tag can be used from HTML5.If anyone knows, could you t...

html html5-canvas

2 years ago

2 answers
127 views
0

JavaScript encodes Base64 to display images in Canvas

function addMessage(value,color,size){ varcanvas= document.getElementById(picture); varctx=canvas.getContext(2d); var image = new Image(); variable image.src="data:image/jpg;base64,+window.bt...

javascript image html5-canvas

2 years ago

1 answers
88 views
0

Transparent treatment of overlapping parts by overlapping canvas elements

Thank you for your help.<div><canvas id=c1><canvas id=c2></div>Overlap the canvas elements as described above and draw the background image on c1 Would it be possible to instal...

javascript html5-canvas

2 years ago

1 answers
110 views
0

When implementing the drawing tool in canvas, I have a question about how to change the size of the figure.

I would like to create this kind of drawing tool on the web browser.https://dl.dropboxusercontent.com/u/429437/html5/seminar/05-draw-tool1.htmlI understand that this is done using the canvas tag.Befor...

javascript html5 html5-canvas

2 years ago

1 answers
146 views
0

ChartJS Tooltip callback function does not work.

We use ChartJS to display bar graphs.I defined callbacks in the tooltips property to edit the contents of the tooltips, but The tooltip does not change the contents.Do you know the cause?▼ Execution E...

javascript html5-canvas chart.js

2 years ago

1 answers
142 views
0

Even if I use getimageData, I can't read images well in the local environment.

This time, when I opened the page, I wrote a grayscale image to canvas, and when I put my mouse on it, it gradually colors.Then, an error occurred in the following parts:I checked and found that Chrom...

javascript css html5 image html5-canvas

2 years ago

1 answers
108 views
0

I want to erase all of the canvas in JavaScript to draw a new one, what should I do?

javascript html5 canvas

2 years ago

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