The mupdf is a good open source pdf reader. It meets almost all of my requirements except it can't reader pdf from right-to-left. Does anybody have any idea about it?
Actually my understanding for RTL is that I can navigate to the last page first. Then go from there. Buy my question is how am I suppose to know a pdf is a RTL one?
MuPDF does not support RTL. You need to start the book from the last page and make minor changes MuPDFPageAdapter getView method as follows:
public View getView(int pos, View convertView, ViewGroup parent) {
final int position;
if(mDirection == DIRECTION_RTL)
position = mCore.countPages() - pos - 1;
else
position = pos;
/** getView remaining code **/
}
Basically reversing the page order. Index 0 become pageCount - 1 and the last page becomes 0.
You can set the current page to the book's last page as follows:
mDocView.setDisplayedViewIndex(mCore.countPages() - 1);
I've uploaded a working sample here:
https://github.com/mardawi/MuPDF-Android-RTL
There isn't any way to know the reading direction of a PDF file. It seems like what you want is not right-to-left but back to front, or bottom to top.
Related
I am using EventHandler to create page header for my pdf. The content of the header are added into a Table before adding to Canvas. As part of 508 compliance, i need to exclude the header content from being read out loud. How do i accomplice this?
public class TEirHeaderEventHandler : IEventHandler
{
public void HandleEvent(Event e)
{
PdfDocumentEvent docEvent = (PdfDocumentEvent)e;
PdfDocument pdf = docEvent.GetDocument();
PdfPage page = docEvent.GetPage();
PdfCanvas headerPdfCanvas = new PdfCanvas(page.NewContentStreamBefore(), page.GetResources(), pdf);
Rectangle headerRect = new Rectangle(60, 725, 495, 96);
Canvas headerCanvas = new Canvas(headerPdfCanvas, pdf, headerRect);
//creating content for header
CreateHeaderContent(headerCanvas);
headerCanvas.Close();
}
private void CreateHeaderContent(Canvas canvas)
{
//Create header content
Table table = new Table(UnitValue.CreatePercentArray(new float[] { 60, 25, 15 } ));
table.SetWidth(UnitValue.CreatePercentValue(100));
Cell cell1 = new Cell().Add(new Paragraph("Establishment Inspection Report").SetBold().SetTextAlignment(TextAlignment.LEFT));
cell1.SetBorder(Border.NO_BORDER);
table.AddCell(cell1);
Cell cell2 = new Cell().Add(new Paragraph("FEI Number:").SetBold().SetTextAlignment(TextAlignment.RIGHT));
cell2.SetBorder(Border.NO_BORDER);
table.AddCell(cell2);
Cell cell3 = new Cell().Add(new Paragraph(_feiNum).SetBold().SetTextAlignment(TextAlignment.RIGHT));
cell3.SetBorder(Border.NO_BORDER);
table.AddCell(cell3);
canvas.Add(table);
}
}
public static void CreatePdf()
{
using (MemoryStream writeStream = new MemoryStream())
using (FileStream inputHtmlStream = File.OpenRead(inputHtmlFile))
{
PdfDocument pdf = new PdfDocument(new PdfWriter(writeStream));
pdf.SetTagged();
iTextDocument document = new iTextDocument(pdf);
TEirHeaderEventHandler teirEvent = new TEirHeaderEventHandler();
pdf.AddEventHandler(PdfDocumentEvent.START_PAGE, teirEvent);
//Convert html to pdf
HtmlConverter.ConvertToDocument(inputHtmlStream, pdf, properties);
document.Close();
byte[] bytes = TEirReorderingPages(writeStream, numOfPages);
File.WriteAllBytes(outputPdfFile, bytes);
}
}
Note that i have set the document to be tagged. but i still get the "Reading Untagged Document" screen when i open the file. However, all of the content are read including the header when i activate the Read Out Loud feature. Any input or suggestion would be appreciated. Thank you in advance for your help.
General
The approach suggested by Alexey Subach is generally correct. You mark the content as artifact to differentiate it from real content.
element.getAccessibilityProperties().setRole(StandardRoles.ARTIFACT);
This marks the content in the content stream and it excludes the element from the structure tree.
Your case
However, your specific case is more nuanced.
For a well tagged PDF document, the proper way to read it out loud is to process the structure tree, which is a data structure that represents the logical reading order of the (semantic) elements of the document, such as paragraphs, tables and lists.
Because of the way you are creating the header content, it is not automatically tagged: a Canvas instance that is created from a PdfCanvas instance has autotagging disabled by default. So the table in the header is not marked in the content stream and it is not included in the structure tree. Marking it explicitly as an artifact, with the approach described above in General, should not make a significant difference because it was not in the structure tree to begin with.
If you enable autotagging by adding headerCanvas.enableAutoTagging(page), you will notice that the table does appear in the structure tree.
If you then add table.getAccessibilityProperties().setRole(StandardRoles.ARTIFACT), the table is excluded from the structure tree again.
Summary: looking at the structure tree, there's no difference between your original code and the approach of General.
Adobe reading order / accessibility settings
From your description, I think you are using Adobe Acrobat or Reader for the read out loud functionality. Under Preferences > Reading > Reading Order Options, you can configure how the content should be processed for the read out loud feature:
From https://helpx.adobe.com/reader/using/accessibility-features.html:
Infer Reading Order From Document (Recommended): Interprets the reading order of untagged documents by using an advanced method of structure inference layout analysis.
Left-To-Right, Top-To-Bottom Reading Order: Delivers the text according to its placement on the page, reading from left to right and then top to bottom. This method is faster than Infer Reading Order From Document. This method analyzes text only; form fields are ignored and tables aren’t recognized as such.
Override The Reading Order In Tagged Documents: Uses the reading order specified in the Reading preferences instead what the tag structure of the document specifies. Use this preference only when you encounter problems in poorly tagged PDFs.
In my tests, the only way I can make Adobe Reader read out loud the header content created with your original code, is when I select Left-To-Right, Top-To-Bottom Reading Order and enable Override The Reading Order In Tagged Documents. In that case, it is basically ignoring the tagging and just processing the content per the location on the page.
With Override The Reading Order In Tagged Documents disabled, the header content is not read, for your original code and with explicit artifacts.
Conclusion
Although it's a good idea to always tag artifacts as such, so they can be properly differentiated from real content, in this case I believe the behaviour you're experiencing is more related to application configuration than to file structure.
Headers and footers are typically pagination artifacts and should be marked as such in the following way:
table.getAccessibilityProperties().setRole(StandardRoles.ARTIFACT);
This will exclude the table from being read. Please note that you can mark any element implementing IAccessibleElement interface as artifact.
I can't seem to find any information on this, but does anyone know if it is possible to use an embedded image from my.resources within an ObjectListView SubItem?
I am currently using images stored in an ImageList control, but I find for some reason, those images get corrupted and start displaying imperfections. I don't have the problem if I pull them from the embedded resources as I previously have with the normal listview control.
I am using the ImageGetter routine to return a key reference the ImageList, however, ultimately I would like to pull these from embedded resources. I would like to also do this for animated GIF references as well.
If anyone knows a way, could you please assist. Sample code would be appreciated.
Thanks
You can return three different types from the ImageGetter
int - the int value will be used as an index into the image list
String - the string value will be used as a key into the image list
Image - the Image will be drawn directly (only in OwnerDrawn mode)
So option number 3 could be what you want. Note that you have to set objectListView1.OwnerDraw = true.
If that does not work, an alternative could be to load the images into the ImageList at runtime. There is an example here.
this.mainColumn.ImageGetter = delegate(object row) {
String key = this.GetImageKey(row);
if (!this.listView.LargeImageList.Images.ContainsKey(key)) {
Image smallImage = this.GetSmallImageFromStorage(key);
Image largeImage = this.GetLargeImageFromStorage(key);
this.listView.SmallImageList.Images.Add(key, smallImage);
this.listView.LargeImageList.Images.Add(key, largeImage);
}
return key;
};
This dynamically fetches the images if they haven’t been already fetched. You will need to write the GetImageKey(), GetSmallImageFromStorage() and GetLargeImageFromStorage() methods. Their names will probably be different, depending on exactly how you are deciding which image is shown against which model object.
Does anyone have any experience with using a url to target a specific slide in a Soliloquy slider? I am using multiple sliders that I need to link to specific slides of from external pages/sites. The Soliloquy Docs provide this info (soliloquywp.com/docs/dynamically-set-the-starting-slide/) as closest to the solution but, for a php noob like me, the explanation is a bit terse and lacking, my fault, not theirs.
The example given in the docs seems to be a custom filter for a specific slide in a specific slider. I need to target slides in multiple sliders with urls. I guess I need help understanding the filter's function. I have commented out what I think each part does. Maybe someone could show me where I'm wrong?
//OP: I don't understand, what ids/slides are represented by the 10 and 2 values in these parameters. Where do I find these?
add_filter( 'soliloquy_pre_data', 'tgm_soliloquy_dynamic_starting_slide', 10, 2 );
function tgm_soliloquy_dynamic_starting_slide( $data, $slider_id ) {
// If the proper $_GET parameter is not set or is not the proper slider ID, do nothing.
//OP: Is the 'sol_slide' parameter for ALL soliloquy sliders in my site or is it the name in the Dashboard given when constructing the slider?
if ( empty( $_GET['sol_slide'] ) ) {
return $data;
}
// Change this if you want to target a specific slider ID, or remove altogether if you want this for all sliders.
//OP: I believe to target ALL sliders in my site I should comment this out. Right?
if ( 51064 !== $slider_id ) {
return $data;
}
// Set the slide number as a config property. Also preventing randomizing slides.
$data['config']['start'] = absint( $_GET['sol_slide'] );
$data['config']['random'] = 0;
// Optionally prevent autostarting the slider. Uncomment if you want that.
//$data['config']['auto'] = 0;
return $data;
}
Basically, I guess I am asking for a little help with implementing this filter to target any slide in any slider with a url. Slim odds, but I'm dead in the water! Big thanks to anyone who can shed some light on this for me.
Complete, correctly functioning answer is here provided the plugin author, of course, duh: http://soliloquywp.com/support/topic/a-way-to-link-directly-to-a-specific-slide/
The value "sol_slide" is generic to any slider created with the plugin. Just put the custom filter provided in the example into your, hopefully, child-theme's functions.php, and construct your urls targeting specific slides like so: http://mywebsite.com/specific-product-page-with-slider/?sol_slide=3. Slide numbering is based on zero so 1 = 2 etc. Works like a charm.
I am new to Windows phone dev. I am following this excellent article ( http://developer.nokia.com/Community/Wiki/Weather_in_Windows_Phone_7 ) and have learnt something about how to load xml data and show it as a useful info in a paronama view. But now instead of panorama i want it to be shown as a page. I am not sure if its in a page tag or data grid tag that I should work with. Can someone please help me with how to convert this piece of code to some thing which can be displayed in a page
// create PanoramaItem
PanoramaItem panoramaItem = new PanoramaItem();
panoramaItem.Header = queries[query];
// modify header to show only city (not the country)
int index = queries[query].IndexOf(",");
if (index != -1)
panoramaItem.Header = queries[query].Substring(0,queries[query].IndexOf(","));
else panoramaItem.Header = queries[query];
// use ForecastTemplate in Panorama Item
panoramaItem.ContentTemplate=(DataTemplate)Application.Current.Resources["ForecastTemplate"];
panoramaItem.Content = pio; // add Panorama Item to Panorama
Panorama.Items.Add(panoramaItem); // query next city forecast
At first, be sure that Pivot is useless for you. Its like Panorama, but Pivot :) See differences here, here, here(nice one) or here
Tried to paste some code here, but SO is not showing tags. So, take a look at <.Grid.ColumnDefinitions> and <.Grid.RawDefinitions>. Dots at the beginning are just for rendering.
Using Rebol/View 2.7.7, I'm trying to create a card game based on Nick's Rebol tutorial at: http://re-bol.com/rebol.html#section-10.18. What I want to do though is read the cards from the binary file Nick created, discard some of the data, and use it to layout a tableau of cards, 4 rows of 3 columns, with the 2 center card locations not used.
Here's my code:
protect-system
random/seed now
do %cards.r ;--include the binary card data
the-tableau: [
size 320x480 backdrop 0.170.0
style tabstyle image 80x100 teal
style holdplace box 80x100 coal
across
at 30x20 tc1: tabstyle
tc2: tabstyle
tc3: tabstyle return
at 30x130 tc4: tabstyle
tc100: holdplace
tc5: tabstyle return
at 30x240 tc6: tabstyle
tc200: holdplace
tc7: tabstyle return
at 30x350 tc8: tabstyle
tc9: tabstyle
tc10: tabstyle
]
lc: copy []
lc: [tc1 tc2 tc3 tc4 tc5 tc6 tc7 tc8 tc9 tc10]
deck-cards: copy [] ; The deck holds all of the cards from the binary file
deck-cards-num: copy []
deck-cards-color: copy []
lay: layout the-tableau
foreach [card label num color pos] cards [
dimg: load to-binary decompress (card)
append deck-cards dimg ;feel movestyle
throw-away-label: label
append deck-cards-num num
append deck-cards-color color
throw-away-pos: pos
]
random-card: does [pick deck-cards random length? deck-cards]
foreach c lc [set-face get c deck-cards]
view lay
do-events
But this doesn't show the cards at all. I'm not even sure it's reading the correctly? Where is the problem?
Actually you didn't use the random-card function in your for loop at the end... :-)
foreach c lc [get c set-face get c random-card ]
You note that you are not sure if data was loaded correctly...
here is a simple way to find out... just print/probe the TYPE? of that data
dimg: load to-binary decompress (card)
probe type? dimg
In this case it will print out image! in the console... so yep... that's working. :-)
As an added little detail, I noticed you didn't compensate your random for the "back face" image in the card data (which is at its end), so the random-card function should be fixed like so:
random-card: does [pick deck-cards random (length? deck-cards) - 1] ; - 1 since we don't want the back face to be picked.
You only need 'do-events if the event loop is not started.
View/new does not start the event loop .. but View does
I'm not addressing your actual problem though :(
to make the do-events note clear, I added a little answer here so I can add some inline code....
here is an example where you'd want your do-events to be used.
view/new lay ; display the interface right now. (with no cards)
random-card: does [pick deck-cards random (length? deck-cards) - 1] ; - 1 since we don't want the back face to be picked.
; deal cards with a half second delay.
foreach c lc [f: get c set-face get c random-card wait 0.5]
do-events
here, any code you put after 'DO-EVENTS will be executed once all view windows have closed.
which can be things like tmp file cleanup, save on exit, "save changes" dialogs, etc.
additional note:
While building graphics code, its a good habit to place this at the very start of you application:
print " "
It will open up the console, and then any view windows will show up in front of it.
When ready to share, just comment the line and remove any print statements in your code.
this is useful for 3 things:
1) Its usually highly annoying when the console always pops-up over your application while its tracing (print/probe/etc) some stuff after your window opens.
2) This also has the more useful side-effect of showing you if your application quit correctly since the console will ALSO quit when all waits have terminated correctly.
In your original example, if you add the above print, then you'll see that the console never closes, so this means the application is still running with no more application windows listening to events.
3) It also has the advantage that you can terminate the graphic app directly by closing the console window. This effectively closes all windows and waits immediately and shortcuts any "on application quit" code you might have (code after do-events).