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fix for figure resizing in webagg #3341

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fix for figure resizing in webagg #3341

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45 changes: 39 additions & 6 deletions lib/matplotlib/backends/web_backend/mpl.js
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Original file line number Diff line number Diff line change
Expand Up @@ -40,7 +40,7 @@ mpl.figure = function(figure_id, websocket, ondownload, parent_element) {
this.rubberband_context = undefined;
this.format_dropdown = undefined;

this.focus_on_mousover = false;
this.focus_on_mouseover = false;

this.root = $('<div/>');
this.root.attr('style', 'display: inline-block');
Expand Down Expand Up @@ -89,9 +89,6 @@ mpl.figure.prototype._init_canvas = function() {
var fig = this;

var canvas_div = $('<div/>');
canvas_div.resizable({ resize: mpl.debounce_resize(
function(event, ui) { fig.request_resize(ui.size.width, ui.size.height); }
, 50)});

canvas_div.attr('style', 'position: relative; clear: both;');
this.root.append(canvas_div);
Expand All @@ -109,8 +106,44 @@ mpl.figure.prototype._init_canvas = function() {

var rubberband = $('<canvas/>');
rubberband.attr('style', "position: absolute; left: 0; top: 0; z-index: 1;")

var ignore_mouse_events = false;

// The if statement below should just be implemented directly in CSS...
if (!$("head").hasClass("boxme"))
{
$("<style type='text/css'> .boxme { background-color: lightgray; border: 1px solid gray;} </style>").appendTo("head");
}

canvas_div.resizable({
start: function(event, ui) {
ignore_mouse_events = true;
ctx = fig.context;
var canvas = ctx.canvas;
canvas.blur(); // removes focus if focused (may need more work?)
canvas_div.addClass("boxme");

/// Clearing the canvas
// Store the current transformation matrix
ctx.save();
// Use the identity matrix while clearing the canvas
ctx.setTransform(1, 0, 0, 1, 0, 0);
ctx.clearRect(0, 0, canvas.width, canvas.height);
// Restore the transform
ctx.restore();
},
stop: function(event, ui) {
ignore_mouse_events = false;
fig.request_resize(ui.size.width, ui.size.height);
canvas_div.removeClass("boxme");
},
});

function mouse_event_fn(event) {
return fig.mouse_event(event, event['data']);
if (ignore_mouse_events == false)
{
return fig.mouse_event(event, event['data']);
}
}
rubberband.mousedown('button_press', mouse_event_fn);
rubberband.mouseup('button_release', mouse_event_fn);
Expand Down Expand Up @@ -379,7 +412,7 @@ mpl.findpos = function(e) {
};

mpl.figure.prototype.mouse_event = function(event, name) {
var canvas_pos = mpl.findpos(event)
var canvas_pos = mpl.findpos(event);

if (this.focus_on_mouseover && name === 'motion_notify')
{
Expand Down