I'm working on a swiftUI app where I have to display multiple PDF files in one screen.
I've created a PDFView:
struct PDFKitRepresentedView: UIViewRepresentable {
let url: URL
init(_ url: URL) {
self.url = url
}
func makeUIView(context: UIViewRepresentableContext<PDFKitRepresentedView>) -> PDFKitRepresentedView.UIViewType {
let pdfView = PDFView()
let pdfDocument = PDFDocument(url: self.url)
pdfView.document = pdfDocument
return pdfView
}
func updateUIView(_ uiView: UIView, context: UIViewRepresentableContext<PDFKitRepresentedView>) {
// Update the view.
}
}
struct PDFKitView: View {
var url: URL
var body: some View {
PDFKitRepresentedView(url)
}
}
The PDF is created here:
if let url = attachment.path {
PDFKitView(url: url)
.frame(width: UIScreen.screenWidth - 40, height: UIScreen.screenHeight - 40, alignment: .center)
.padding()
}
The problem I'm having is that, whenever the first document is multipage, in order to see the other documents the user has first to pinch to zoom out completely and the other PDF's are shown in sequence.
I've tried to add this values, but that just makes the content of the PDF to disappear
I was wondering if setting the frame on the PDFKitView directly could be causing the issue, but no.
Anyone has any suggestions on how to make this work? I assume that if I could make the pdf to show already with a min zoom it would display the view correctly.
I finally found the answer on this post How to detect where NaN is passing to CoreGraphics API on Mac OS X 10.9
This one I've been banging my head against for a few weeks now.
Scenario:
Let user generate an image out of layers they select
Convert image to canvas
Share image from canvas on facebook wall using share_open_graph (along with the image, a short text and title will be shared)
I've already had a solution in place using publish_actions but that was recently removed from the API and is no longer available.
I am using js and html for all code handling.
The issue is that I can generate a png image from the canvas but that is saved as base64 and share_open_graph doesn't allow this type of image, it needs a straight forward url such as './example.png'. I have tried using several approaches and with canvas2image, converting and saving image using file-system but all of these fail.
Does anyone have similar scenario and possible solution from April/May 2018 using share_open_graph ?
My current code looks like this - it fails at the image conversion and save to a file (Uncaught (in promise) TypeError: r.existsSync is not a function at n (file-system.js:30)). But I am open to different solutions as this is clearly not working.
html2canvas(original, { width: 1200, height: 628
}).then(function(canvas)
{
fb_image(canvas);
});
var fb_image = function(canvas) {
canvas.setAttribute('id', 'canvas-to-share');
document.getElementById('img-to-share').append(canvas);
fbGenerate.style.display = 'none';
fbPost.style.display = 'block';
var canvas = document.getElementById('canvas-to-share');
var data = canvas.toDataURL('image/png');
var encodedPng = data.substring(data.indexOf(',') + 1, data.length);
var decodedPng = base64.decode(encodedPng);
const buffer = new Buffer(data.split(/,\s*/)[1], 'base64');
pngToJpeg({ quality: 90 })(buffer).then(output =>
fs.writeFile('./image-to-fb.jpeg', output));
var infoText_content = document.createTextNode('Your image is being
posted to facebook...');
infoText.appendChild(infoText_content);
// Posting png from imageToShare to facebook
fbPost.addEventListener('click', function(eve) {
FB.ui(
{
method: 'share_open_graph',
action_type: 'og.shares',
href: 'https:example.com',
action_properties: JSON.stringify({
object: {
'og:url': 'https://example.com',
'og:title': 'My shared image',
'og:description': 'Hey I am sharing on fb!',
'og:image': './image-to-fb.jpeg',
},
}),
},
function(response) {
console.log(response);
}
);
});
};
I have a card layout, Inside card there are many panels inside card items.
I want some listener which will be fired as soon as panel inside card layout is visually activated.
i was trying to achieve the same with Activate and show event,but i am not getting desired output.
One approach would be to write a controller that references all the views, if you are using the MVC pattern:
Ext.define('MyApplication.controller.PanelsController', {
extend : 'Ext.app.Controller',
itemId : 'panelsController',
views : [
'Panel1',
'Panel2' // etc...
],
init : function (application) {
this.control(
{
'panel#panel1' : {
show : this.myListener
}
});
},
myListener : function () {
// do stuff here.
}
});
I want to create a view for viewing a pdf from the server.I got this st2_pdf_panel after several minutes in google.I followed the demo and copy the pdf.js and PDF.js into my project.
1 But when the app runs,the paging toolbar will show first before loading the pdf file in the middle of the view and then it will dock to the bottom.
2 The pdf view does not scroll and the scale looks bad in the iphone screen,i can hardly see the words in the page.
3 How to zoom in or zoom out ?
4 Is there any substitue for this solution ?
Below is the code of the view :
Ext.define('Myapp.view.PDF',{
extend : 'Ext.Container',
requires : ['Ext.ux.panel.PDF'],
config : {
items : [
{
xtype : 'titlebar',
docked : 'top',
title : 'PDF',
items : [
{
text : 'back',
ui : 'back',
align : 'left',
listeners : {
tap : function(){
console.log('goback');
}
}
}
]
},//title bar
{
xtype : 'pdfpanel',
height : '100%',
src : 'http://cdn.mozilla.net/pdfjs/tracemonkey.pdf',
style : {
backgroundColor : '#333'
},
pageScale : 0.5,
pageText: 'page {0} of {1}',
}
]
}//config
});
I'm trying to use sencha touch's listpaging plugin. But there is almost no good( or bad ) documentation about how to use it and i'm confused.
When i activate the plugin in my list
this.myList = new Ext.List({
store: this.myStore,
plugins: [{
ptype: 'listpaging',
autoPaging: false
}],
itemTpl: '...'
});
a 'Load More' text and a loading image is added to the end of the list.
But i don't know how to configure my store to enable this plugin to be able to load more data.
App.regStore('MyStore', {
model: 'myModel',
proxy: {
type: 'ajax',
url: 'http://mydomain.com/json?howmany=10&page=1',
reader: {
type: 'json',
root: 'results'
}
}
});
App.stores.myStore = Ext.StoreMgr.get('MyStore');
How can i configure my store so when i tap "Load more", the store brings up page 2 and add them to the list automatically?
I've had a similar issue with the ListPaging plugin in SenchaTouch 2, and managed to sort out the 'load more' message behaviour when the end of the data set is reached.
This builds on what John Gordon has come up with (regarding specifying the pageSize and clearOnPageLoad config options), since these properties seem to be the same in Senchatouch 2. I haven't looked at SenchaTouch 1.x in detail. In SenchaTouch 2, all config options must be defined in a config property:
Ext.define('MessagingApp.store.MessageThreads', {
extend : 'Ext.data.Store',
requires: ['MessagingApp.model.MessageThread'],
config:
{
model: 'MessagingApp.model.MessageThread',
autoLoad: false,
clearOnPageLoad: false, // This is true by default
pageSize: 10, // This needs to be set for paging
proxy: {
type: 'jsonp',
pageParam: 'currentPage',
limitParam: 'pageSize',
url: APIURL + '/message-app-service/GetMessageThreads',
reader: {
type: 'json',
rootProperty: 'Data'
}
}
}
});
In the view, where we specify the plugins, we can override the 'load more' and 'no more records' messages:
{
xtype:'dataview',
store:'MessageThreads',
id:'threadList',
itemTpl:Ext.create('Ext.XTemplate',
'<!-- template markup goes here -->',
{
//custom helper functions here
}
),
plugins:[
{
xclass:'Ext.plugin.ListPaging',
autoPaging: true,
// These override the text; use CSS for styling
loadMoreText: 'Loading...',
noMoreRecordsText: 'All messages loaded'
}
]
}
The issue is that while our web service returns an array of records for a particular page, there is no overall total count property, which is needed for the plugin to determine when all records have been loaded. Hence as it is, the 'Load more' message will remain (issue #1 in the accepted solution). So in the init function of our controller, we have to attach an event handler for the load event on the store to hook into when a new page of data is received:
Ext.define('MessagingApp.controller.Messages',
{
extend: 'Ext.app.Controller',
config:
{
views: [
'MessageThreads',
// Other views referenced by this controller
],
stores: [
'MessageThreads'
],
refs:
{
// References to UI elements by selector...
}
},
init: function() {
// Other internal initialisation...
this.control(
{
// Selector-object pairs...
});
// Provide a means to intercept loads of each page of records
var threadStore = Ext.getStore('MessageThreads');
threadStore.addBeforeListener('load', this.checkForThreadListEnd, this);
},
// Remaining controller functions...
});
In the handler, we realise that we've reached the end of the data set when the number of records returned is less than the page size. If the total record count is a multiple of the page size, the last 'page' will have an empty array. Once the end of the data set has been identified, we update the totalCount config property of the store:
checkForThreadListEnd: function(store, records, isSuccessful) {
var pageSize = store.getPageSize();
var pageIndex = store.currentPage - 1; // Page numbers start at 1
if(isSuccessful && records.length < pageSize)
{
//Set count to disable 'loading' message
var totalRecords = pageIndex * pageSize + records.length;
store.setTotalCount(totalRecords);
}
else
store.setTotalCount(null);
},
// Other controller functions...
Because this is a 'before' event handler, this property will be crucially updated before the plugin decides whether to display the 'load more' or 'no more records' messages. Unfortunately, the framework doesn't provide a means to hide the 'no more records' message, so this would have to be done via CSS.
Hope this helps.
I'm having problems finding good documentation, too, but I can at least answer your question. You need to add pageSize to your store, clearOnPageLoad as well, if you want to not clear out what was already loaded. Her's my code:
Ext.regStore('publicresources', {
model: 'PublicResource',
autoLoad:false,
remoteFilter:true,
sortOnFilter:true,
pageSize: 15,
clearOnPageLoad: false,
sorters: [
{
property : 'distance',
direction: 'ASC'
}
]
});
My outstanding issues that I'm looking into are:
How to turn off the "More" element when there are no more records to load
How to detect that there are no more records to load, and where to put that detection code.
How to keep the list at the location that the user was at. Each load jumps back to the 1st item in the list
Good luck!
Remember also that this works only server side currently.
Forum thread http://www.sencha.com/forum/showthread.php?105193-Store-pageSize
In regards to the "load more vs. no more records" message -
If you are writing a custom proxy (example here A Sencha Touch MVC application with PhoneGap), you set the total records in the returned Operation.
If the total records are not yet known, you can do something like the below, where,
1) if you are returning the requested limit of records, set the total to something larger than the records the store will now hold
2) if returning < the requested limit of records, set the total to 1 (to force the "no more records message")
//return model instances in a result set
operation.resultSet = new Ext.data.ResultSet({
records: contacts,
//total : contacts.length,
total : contacts.length === operation._limit ? (operation._limit * operation._page +1) : 1,
loaded : true
});
//announce success
operation.setSuccessful();
operation.setCompleted();
//finish with callback
if (typeof callback == "function") {
callback.call(scope || thisProxy, operation);
}
Just to add what worked for me..
If your server returns a totalCount and you want to set it you can use the totalProperty in the reader
reader: {
type: 'json',
rootProperty: 'results',
totalProperty: 'resultCount'
}