I'm working on a utility that pastes images with text. So far the best way I've found to do this was using NSPasteboard and encapsulating the images and text in an RTFD data stream. The problem I'm having is that even though I have no font attributes (I have checked) every time I paste copied code into a document it changes the font to 'Helvetica size 12'. Is it possible to force paste the text and images without changing the font?
void copyData() {
let pboard = NSPasteboard.generalPasteboard()
pboard.clearContents()
let str = NSMutableAttributedString()
for im in images {
let a = NSTextAttachment()
a.image = im
let s = NSAttributedString(attachment: a)
str.appendAttributedString(s)
}
//now I have an rtf with a whole bunch of images
let range = NSMakeRange(0, str.length)
if let d = str.RTFDFromRange(range, documentAttributes: [NSDocumentTypeDocumentAttribute: NSPlainTextDocumentType]) {
pboard.setData(d, forType: NSPasteboardTypeRTFD)
}
pboard.writeObjects(images)
}
Related
I haven't write code for this But I want some help that can it be possible to code so that it shows new photo everyday. for example I have 10 images and I want to display each image for like September 16,17,18, and so on ?
Here you go...
Call method getImageForToday() where ever you want to fetch image for today (This solution will work specific to your case, i.e. as you mentioned you have 10 images)
func getImageForToday() -> UIImage
{
let arrImages = ["image1.png", "image2.png" ... "image10.png"]
var imageName = arrImages[getLastCharacterFromTodayDate()]
return UIImage(named: imageName)
}
func getLastCharacterFromTodayDate() -> Int
{
let calendar = NSCalendar(calendarIdentifier: NSCalendarIdentifierGregorian)!
let component = calendar.components(NSCalendarUnit.CalendarUnitDay, fromDate: NSDate())
return component.day % 10
}
You can use the object NSDate to know what day is it and after that doing something.
First you have your dictionnary of image like that :
let images = [ UIImage(named: "image1.png")!, UIImage(named: "image2.png")!, UIImage(named: "image3.png")]
so now, you must know what day is it for the first app openning in exemple.
So you can do that :
let date = NSDate()
You put the element date in UserDefaults. (in order to save it)
You can now display a image. You make a random number and you take UIImage at this random position.
The day after, or the next app opening you recheck the NSDate with the NSDate saved and if it's different you take a other photo.
I've been struggling all week with this one. My first few attempts landed me with RGBA images from a monochrome image. I've gotten down to 8bit gray scale. But I need more compression. Indexed is the way to go but I have found no sample code or documentation (and I've looked) to do it. I've already asked on the Apple Developer Forums and came up blank so far.
I'm using Swift 1.2 in Xcode 6.3.1 targeting OS X 10.10. Here is a relevant section of code.
func createBitmapContext (size: CGRect) -> CGContext! {
let context = CGBitmapContextCreate(nil,
Int(size.width),
Int(size.height),
8,
0,
CGColorSpaceCreateDeviceGray(),
CGBitmapInfo(CGImageAlphaInfo.None.rawValue))
CGContextSetInterpolationQuality(context, kCGInterpolationNone)
CGContextSetShouldAntialias(context, false)
return context
}
func createCGImage(ci: CIImage) -> CGImage? {
let contextOptions = [kCIContextOutputColorSpace: NSNull(),
kCIContextWorkingColorSpace: NSNull(),
kCIContextUseSoftwareRenderer: true]
let cgContext = createBitmapContext(ci.extent())
let context = CIContext(CGContext: cgContext, options: contextOptions as [NSObject : AnyObject])
CGContextDrawImage(cgContext, ci.extent(), context.createCGImage(ci, fromRect: ci.extent()))
return CGBitmapContextCreateImage(cgContext)
}
func saveImage(path: String, image: NSData) {
image.writeToFile(path, atomically: true)
}
func getImageFileData(image: CGImage) -> NSData? {
var pngDataRef = CFDataCreateMutable(nil, 0)
let pngDest = CGImageDestinationCreateWithData(pngDataRef, kUTTypePNG, 1, nil)
CGImageDestinationAddImage(pngDest, image, nil)
CGImageDestinationFinalize(pngDest)
return pngDataRef
}
The code takes a CIImage that is already B&W. It gets rendered into a supported context to create a gray scale CGImage. I have not found a way to create an Indexed context. The image destination is an NSData object because I want to do some work with it before I spit it out to a file. The NSData object contains the file data as it will appear on disk.
What I want is an indexed image that is one bit per pixel. I know that PNG supports that format and that OS X will read it. I just haven't figured out how to create it.
Help much appreciated. Thanks.
As part of a project I am realizing, there are given pdfdocuments which include forms as JPEG Images within A4 pages inside this documents. If have to extract those JPGs out of the PDF. Later on those JPGs are used to build PDF Documents again.
When I simply open up those Documents with any PDFViewer they seem to have no rotation at all, at least it is not visible. So like this icon the have vertical format.
but when I use this sample code to extract the images :
PDDocument doc = PDDocument.load("/path/to/file);
List pages = doc.getDocumentCatalog().getAllPages();
Iterator iter = pages.iterator();
int i = 0;
while (iter.hasNext()) {
PDPage page = (PDPage) iter.next();
System.out.println(page.getRotation());
System.out.println("ROTATION = " + page.getRotation());;
PDResources resources = page.getResources();
Map pageImages = resources.getXObjects();
if (pageImages != null) {
Iterator imageIter = pageImages.keySet().iterator();
while (imageIter.hasNext()) {
String key = (String) imageIter.next();
if(((PDXObjectImage) pageImages.get(key)) instanceof PDXObjectImage){
PDXObjectImage image = (PDXObjectImage) pageImages.get(key);
image.write2file("/path/to/file" + i);
}
i ++;
}
}
}
all extracted JPGs are horizontal format. Further the sysout on the page.rotation tells me that the rotation is set to 270°.
How is that possible? 270 is set, but the PDF is shown vertical (I am no expert on PDF). I even did page.setRotate(0) before extracting the JPGs, but the images still remain horizontally. I read the following Thread telling how to rotate images before drawing them on the pdf. But i need to rotate them before writing them on the filesystem. What is the best way to achieve that?
Unfortunately, I can not attach any of the documents since they are confidential.
Can somebody help me with the following code snippet to capture part of or the whole desktop on OSX ? I would like to specify the upper-left corner coordinates (x,y) and the width (w) and height (h) of the rectangle that defines the capture.
It's for a C# MonoMac application on OSX.
This is what I've done:
int windowNumber = 2;
System.Drawing.RectangleF bounds = new RectangleF(0,146,320,157);
CGImage screenImage = MonoMac.CoreGraphics.CGImage.ScreenImage(windowNumber,bounds);
MonoMac.Foundation.NSData bitmapData = screenImage.DataProvider.CopyData();
It looks like I have the bitmap data in 'bitmapData', but I'm not sure how I convert the NSData instance 'bitmapData' to an actual Bitmap; i.e. :
Bitmap screenCapture = ????
The documentation is really sparse and I've googled for examples without luck. So I'm hoping that there's a kind MonoMac expert out there who can point me in the right direction? - An example would be nice :o)
Thank you in advance!
This will give you the bytes of your capture in a .NET byte[], from where you can create a Bitmap or Image or whatever you want. Might not be exactly what you are looking for but should put you in the right direction.
int windowNumber = 2; System.Drawing.RectangleF bounds = new RectangleF(0,146,320,157);
CGImage screenImage = MonoMac.CoreGraphics.CGImage.ScreenImage(windowNumber,bounds);
using(NSBitmapImageRep imageRep = new NSBitmapImageRep(screenImage))
{
NSDictionary properties = NSDictionary.FromObjectAndKey(new NSNumber(1.0), new NSString("NSImageCompressionFactor"));
using(NSData tiffData = imageRep.RepresentationUsingTypeProperties(NSBitmapImageFileType.Png, properties))
{
byte[] imageBytes;
using(var ms = new MemoryStream())
{
tiffData.AsStream().CopyTo(ms);
imageBytes = ms.ToArray();
}
}
}
Is is possible to capture the Mac OS X desktop without desktop items and any windows that may be open (i.e. just the wallpaper)?
I've experimented with CGWindowListCreateImage, CGWindowListCreateImageFromArray, and CGDisplayCreateImage, but no luck.
Essentially I'm trying to capture the desktop wallpaper without using [NSWorkspace desktopImageURLForScreen:] (it's a sandboxed app without access to the file system).
You'll need to be careful to test that this is still correct, but the desktop window sits below the Finder (it's drawn by the Dock). Passing the kCGWindowListOptionOnScreenBelowWindow CGWindowListOption to CGWindowListCreateImage should get you what you want (unless something else is drawing below that level).
Otherwise, you'll need to use CGWindowListCreate and iterate through the response excluding anything that isn't drawn by the dock at the window level kCGMinimumWindowLevel + 19.
It gets kind of tricky when there are multiple screens, but hopefully this information is enough for you to do what you need.
I know this is a super old question, and Tony Arnold's question is right, and what I used to build my own "grab the desktop" code.
I have some example code that shows how to do all these things (it's a wonderful thing walking in parts of Cocoa that are barely documented... )
I've put that sample code up in a bitbucket repository. Specifically the code sample to take a picture. (There's more interesting Cocoa code in my learning Cocoa repository, where that sample code is from )
Swift version:
extension NSImage {
static func desktopPicture() -> NSImage {
let windows = CGWindowListCopyWindowInfo(
CGWindowListOption.OptionOnScreenOnly,
CGWindowID(0))! as NSArray
var index = 0
for var i = 0; i < windows.count; i++ {
let window = windows[i]
// we need windows owned by Dock
let owner = window["kCGWindowOwnerName"] as! String
if owner != "Dock" {
continue
}
// we need windows named like "Desktop Picture %"
let name = window["kCGWindowName"] as! String
if !name.hasPrefix("Desktop Picture") {
continue
}
// wee need the one which belongs to the current screen
let bounds = window["kCGWindowBounds"] as! NSDictionary
let x = bounds["X"] as! CGFloat
if x == NSScreen.mainScreen()!.frame.origin.x {
index = window["kCGWindowNumber"] as! Int
break
}
}
let cgImage = CGWindowListCreateImage(
CGRectZero,
CGWindowListOption(arrayLiteral: CGWindowListOption.OptionIncludingWindow),
CGWindowID(index),
CGWindowImageOption.Default)!
let image = NSImage(CGImage: cgImage, size: NSScreen.mainScreen()!.frame.size)
return image
}
}