svgedit/editor/extensions/ext-panning.js

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/*
* ext-panning.js
*
* Licensed under the MIT License
*
* Copyright(c) 2010 Alexis Deveria
*
*/
/*
This is a very basic SVG-Edit extension. It adds a "Hello World" button in
the left panel. Clicking on the button, and then the canvas will show the
user the point on the canvas that was clicked on.
*/
svgEditor.addExtension("ext-panning", function() {
return {
name: "Extension Panning",
// For more notes on how to make an icon file, see the source of
// the hellorworld-icon.xml
svgicons: "extensions/ext-panning.xml",
// Multiple buttons can be added in this array
buttons: [{
// Must match the icon ID in helloworld-icon.xml
id: "ext-panning",
// This indicates that the button will be added to the "mode"
// button panel on the left side
type: "mode",
// Tooltip text
title: "Panning",
// Events
events: {
'click': function() {
// The action taken when the button is clicked on.
// For "mode" buttons, any other button will
// automatically be de-pressed.
svgCanvas.setMode("ext-panning");
}
}
}],
// This is triggered when the main mouse button is pressed down
// on the editor canvas (not the tool panels)
mouseDown: function() {
// Check the mode on mousedown
if(svgCanvas.getMode() == "ext-panning") {
svgEditor.setPan(true);
// The returned object must include "started" with
// a value of true in order for mouseUp to be triggered
return {started: true};
}
},
// This is triggered from anywhere, but "started" must have been set
// to true (see above). Note that "opts" is an object with event info
mouseUp: function(opts) {
// Check the mode on mouseup
if(svgCanvas.getMode() == "ext-panning") {
svgEditor.setPan(false);
}
}
};
});