let me explain this clearly: i'm decide to learn about how to store my data with SQLite, and i decide to download sample code and examine it.
So, i have a .csv file with data, when my program launch, first thing user see is rows of elements. (Its like when you enter "Contacts" in your iPhone, just rows with names on it). When user tap an element, next view display data about it (not really matter what data is, there is a xib controller and its easy to manage).
My question is - how to change color of rows? I don't want it to be "standard white" color, maybe some color i want to import (or default colors, but not just white).
This sqlite3 file was created using .csv file, sqlite command tab (terminal), and python. Then imported to application in Xcode.
Please help me!
Color display is controlled by your "sample code". If you really want to change the colors you'll need to ask more specifically in case someone else has seen it. To do it yourself, you need to dig into the source (or in its documentation), find where and how it sets the colors, and change it. A possible short-cut would be to search for common color names using an all-file search (if your IDE offers it, or using grep if you're developing on linux/osx). This might lead you to the places where colors are defined.
But if your goal is to learn SQL, my advice would be not to waste your time on the application. Ignore the ugly colors and move on to a different environment as soon as you get the chance.
Related
I am using VFR reader to display my pdf's. I need to extract the Table of Contents on a button click and display it in a tableview then it should lead to the respective pages while tapping on each.I googled for this and got these links
Create a table of contents from a pdf file
http://mobile.tutsplus.com/tutorials/iphone/ios-sdk-adding-a-table-of-contents-to-an-ipad-reader/
And i came to know that, to get TOC we must use "CGPDFDocumentGetCatalog(pdf doc)". But in my reader that "CGPDFDocumentGetCatalog(pdf doc)" is not at all getting called. Now how can i extract my TOC from my pdf file? Kindly help me out of this. I am struggling on this for a week. Thanks in advance.
Unfortunately I think the two answers you refer to point to different implementation strategies, which are both possibly valid but are different.
The first question is what the PDF files you have and want to show in your app look like. There is no such thing as a predefined TOC object in a PDF file, there are simply different ways to emulate this. The two most common ways are:
A) Bookmarks, which are a way to add little pieces of text to a structured tree, where each piece of text points to a specific location in the PDF file. These bookmarks can be added in the design application or later (there are specific tools to do so) and they can implement whatever structure.
B) Your PDF file might contain something that looks like a classic TOC from a book, which is basically just text on the opening pages, optionally with hyperlinks to specific locations in the book.
The second link you refer to shows how to create user interface where you can show the TOC in. The remaining question then is to figure out what items you want to display in the TOC window. In this second link you point to, the solution presented is to provide hard-coded items specific to one specific book. Of course this approach is not very useful when you want to display just any book.
So the question you are left with is how to figure out what items to display and where they link to.
If you consider my possibility A) above: a PDF file with bookmarks, the answer could be relatively simple. Answer 1 you point to explains how to look at the different structures inside a PDF file - bookmarks are simply such a structure (Defined in section 12.3 of the PDF specification: http://www.adobe.com/content/dam/Adobe/en/devnet/acrobat/pdfs/PDF32000_2008.pdf)
This means you could use the techniques shown there to walk the different objects in the PDF file, and find each bookmark. The bookmark will give you the text to display and the actual location in the PDF file that text should jump to when clicked.
If you consider my possibility B) above: a PDF file without bookmarks but a classic TOC, this will be much harder to solve. Such table of contents are simply text on one or more pages, optionally with hyperlinks. Of course you could try to find all text on these pages (if you can figure out on which page the TOC starts and ends), but you'd then also have to figure out where that item links to. If there are no hyperlinks involved, that would be a daunting task.
So your first question should be how generic you want to solve this problem. Do you know which PDF files you'll want to display? Can you devise a TOC for these files yourself (as in your solution 2)? If not, can you be sure all PDF files contain bookmarks? The answer to those questions will largely determine the rest of your strategy...
Is it possible to get page title via iText?
The PdfTextExtractor returns all text from the page but I don't know what line is title. Also, title may contain more than one line
I don't know coordinates of title thus I can't use RegionTextRenderFilter
I can try to analyze the font size and take the line(s) with biggest font but TextRenderInfo doesn't provide public access to gs (private final GraphicsState gs)
Any other ideas?
Pages within a PDF don't have titles, they just have text that happens to be bold or in a large font and appears in an area you consider to be "more top" than other pieces of text. It sounds like you know this already, I just needed to be clear on this.
See my post here which shows how to get font information by subclassing ITextExtractionStrategy. My sample targets iTextSharp which is the .Net port of iText but they match pretty much feature-to-feature. The biggest differences is that Java uses getXXX and setXXX whereas .Net just uses XXX for both. Otherwise everything should port just fine.
The moral of the story is that you are going to have to write some arbitrary rules defining what you think of as a "title" and then parse based on those rules.
I'm fairly new to Cocoa and am having trouble Googling for the best way to design my iPhone app.
This app is for viewing a stageplay. It should pretty print the script such that character headings are centered and in small caps, say, and stage directions are in italics etc. It should also allow one character's lines to be highlighted (i.e. dynamic formatting).
Looking at this question it looks like NSTextView/NSTextStorage will provide the formatting requirements I want, I'm just confused as to how to construct the view from the underlying data.
I'm thinking at the moment my source will be XML in the following form:
<script>
<dialogue character="bob">Hello Sue!</dialogue>
<stageDirection>He moves to the table</stageDirection>
<dialogue character="sue">Hello Bob!</dialogue>
</script>
Which would output something similar to the following:
BOB
Hello Sue!
He moves to the table
SUE
Hello Bob!
How do I go from a document model (XML / CoreData / ...) to a view containing pretty formatted text?
Any advice or pointers would be great; I just can't get my head around this problem!
If interactivity isn't required then the most easy way I can think of is to generate HTML and render it with UIWebView. Dynamic highlighting can be done with stringByEvaluatingJavaScriptFromString:
UPDATE
Next relatively easy option is to compose styled text with individual UILabels. Basically you have an array of text entries (cues, stage directions etc.), each with it's own style. We create an array of corresponding UILabels with styles applied and then layout them on "script view". After that we can put this "script view" in UIScrollView and that's it. Size of label required to fit particular text can be determined with sizeWithFont:constrainedToSize:lineBreakMode: of NSString.
There are also CoreText services available, but this is much more advanced option.
I've been working on a Cook Book App and I've been making each page individually which takes a really long time to do, I asked a question similar to this and it was brought to my attention that you can setup a way to automate the design process so all you need to do is input your data.
Can someone please explain in as much detail as possible how you setup your xcode files/code to automate such a process
So for example I would just enter the page text and it would automatically put my standard background picture in and add a scroll view and appropriate buttons etc.
Thanks
You could make one master view that contains all the controls that you need: standard background picture, scroll view, appropriate buttons, etc, and make any subsequent views that you create inherit from this view, so that they all contain those controls.
You could also use just one view and work with multiple instances of it, one instance per page. Just make sure to have a Text property on it, or a constructor that takes in your text string, so that you could set it to a different text on each page.
Xcode project templates and file templates are pretty easy to make, with a few caveats.
Check the answers to these questions:
Add new templates in Xcode
Change templates in XCode
Also take a gander at these handy tutorials:
Custom Xcode Templates
Xcode: How to customize the existing project templates
It sounds to me like your putting your data into your views (pages). That's a big design error. You need to employ the Model-View-Controller design pattern and separate your data from your views. That will make it easy to create one view (template) that you can reload with data to display each individual recipe.
The first thing to do is to separate your data from the view. You need to have the recipes stored in an array, dictionary, Core Data etc and then wrap that data in a dedicated object. The second thing to do is to create a dedicated view to display all the recipes. As the user moves from recipe to recipe the app will simply remove and add information to the same view as needed.
I would recommend Cocoa Recipes for Mac OS X: The Vermont Recipes, Second Edition because it addresses these issues and it uses a recipe type app as its example. It's for Cocoa but the basic principles apply to iPhone apps as well.
I am trying to create GTK Widget like shows in following Images
Is it possible to create it in GTK+ under C,
I tried using GtkExpander but it is not working out ...
Can any one Help....
Stripping the arrow is quite trivial. Just append the following code to you $HOME/.gtkrc-2.0 (or create it if not found):
style "pradeep" {
GtkExpander::expander-size = 0
GtkExpander::expander-spacing = 0
}
widget "*.GtkExpander" style "pradeep"
This is done by customizing the appearance using resource files. You can get the same result programmatically by changing the GtkExpander style properties.
Furthermore, you can connect your own callback to its "activate" signal and switch the background color of the widget whenever is active or not. And a lot more...
Just remember someone loves to have a consistent user interface.
If what you want is to duplicate the look, then there are two very inefficient solutions to the problem:
Write your own GTK theme engine (see Murrine or Clearlooks).
Replace your entire program by a GtkDrawingArea widget and use Cairo to draw exactly the look you want. You'll be on your own then, though, so you'll have to write all your widget placement algorithms, buttons, expanders, menus, and whatnot, from scratch.
GTK isn't really meant for this sort of thing. The whole point of GTK is that you design your user interface with the standard widgets, and they just work with whatever theme, language, or accessibility technologies your users need to use. If you design your own look and there's no way to change it, then someone with color blindness or poor eyesight won't be able to use it. Or the text will get all misaligned if someone uses your application in another language. Or at the very least, maybe someone just likes a black desktop with white lettering, and your application will stick out and look really ugly on that user's computer. If you really need to make it look exactly that way, then probably GTK isn't the right tool for you.