tinyMCEPopup is not working in v4.2.6 - tinymce

Question

We are upgrading tinyMCE from v3.5 to v4.2.6 and in previous we used tinyMCEPopup in many places for the requirement. But in new version it raising an error as "ReferenceError: tinyMCEPopup is not defined".
Please suggest me on this.
Please find the below sample custom plugin's js file where we used tinyMCEPopup.
tinyMCEPopup.requireLangPack();
var ImagepopupDialog = {
init : function() {
},
insert : function(text) {
tinyMCEPopup.editor.execCommand('mceInsertContent', false, text);
tinyMCEPopup.close();
}
};
tinyMCEPopup.onInit.add(ImagepopupDialog.init, ImagepopupDialog);

Answer 1

In Tinymce 4 popups are working differently than with Tinymce 3.
Now, you need to call the editor.windowmanager to open up a popup.
The code would be something like this:
win = editor.windowManager.open({
title: "Special character",
spacing: 10,
padding: 10,
items: [
charMapPanel,
{
type: 'label',
name: 'preview',
text: ' ',
style: 'font-size: 40px; text-align: center',
border: 1,
minWidth: 100,
minHeight: 80
},
{
type: 'label',
name: 'previewTitle',
text: ' ',
style: 'text-align: center',
border: 1,
minWidth: 140,
minHeight: 80
}
],
buttons: [
{text: "Close", onclick: function() {
win.close();
}}
]
});