So, in reference to : Kiosk Applications - OS X programming - Multiple monitors
I have an 800x600 NSView and I need to scale this proportionally when I enter full screen mode using NSView's enterFullScreenModeWithOptions.
Right now, what's happening is the UI elements are stationary at where they were initially defined and the view is occupying the full screen mode. To top this off, my view has a background image which occupies the top left 800x600 square on the monitor too. So how do I scale everything in the view proportionally to fit the screen when in full screen mode?
Thanks again,
Teja
I implemented a viewer, which inherits form NSView. Before my image gets drawn, I do the resize [image setSize:size] to fit my image to the fullscreen.
if([myviewer isInFullScreenMode]){
int width = [[NSScreen mainScreen] frame].size.width;
int height = [[NSScreen mainScreen] frame].size.height;
NSSize size;
size.width = width;
size.height = height;
[image setScalesWhenResized:YES];
[image setSize:size];
}
Hope, this can help anyone.
Related
I'm having some trouble achieving the result I need.
Using the method visibleRect of UIScrollView, and using the gesture recognizer, I can get where, in the screen, the user touched, or draw a rect, for example.
Where I'm having some trouble is getting the information of where that touch event is relative to the document shown in the UIScrollView.
So, if I have a document like A4 size or Letter size, and the visible part is the bottom of that document, using the above method I can see the user tapped the top content of the window. But how can I know what that point refers to the document shown?
Use contentOffset to achieve that:
Add scroll offest to x and y touches:
CGFloat xOffset = _myScrollView.contentOffset.x;
CGFloat yOffset = _myScrollView.contentOffset.y;
Then take of it the position of the scrollview:
CGRect frame = _myScrollView.frame;
All:
CGFloat pdfTouchX = screenTouchX - frame.origin.x + xOffset;
CGFloat pdfTouchY = screenTouchY - frame.origin.y + yOffset;
I have a UIImage which is inside a UIScrollView so I can zoom-in and zoom-out, crop, move around, etc.
How do I get the coordinates of the visible part of the UIImage inside the UIScrollView.
I want to crop the image in it's native resolution (using GPUIImage) but I need to x, y, width and height for the rectangle.
I use a scrollview to enable zoom of a UIImage. A cropping button presents an overlaid resizable cropping view. The following is the code I use to ensure the user defined crop box in the UIScrollView gets added with the correct coordinates to the UIImageView (can then use to crop image).
To find the x and y coordinates use the scrollview contentOffset multiplied by inverse of zoomscale:
float origX = 0;
float origY = 0;
float widthCropper = 0;
float heightCropper = 0;
if (_scrollView.contentOffset.x > 0){
origX = (_scrollView.contentOffset.x) * (1/_scrollView.zoomScale);
}
if (_scrollView.contentOffset.y > 0){
origY = (_scrollView.contentOffset.y) * (1/_scrollView.zoomScale);
}
If you need to create a properly sized cropping box for what is displayed in the scrollview you will need to adjust the width and the height for any zoom factor:
widthCropper = (_scrollView.frame.size.width * (1/_scrollView.zoomScale));
heightCropper = (_scrollView.frame.size.height * (1/_scrollView.zoomScale));
and to add this properly sized rectangle as a cropping view to the UIImageView:
CGRect cropRect = CGRectMake((origX + (SIDE_MARGIN/2)), (origY + (SIDE_MARGIN / 2)), (widthCropper - SIDE_MARGIN), (heightCropper - SIDE_MARGIN));
_cropView = [[UIView alloc]initWithFrame:cropRect];
[_cropView setBackgroundColor:[UIColor grayColor]];
[_cropView setAlpha:0.7];
[_imageView addSubview:_cropView];
[_imageView setCropView:_cropView];
I have an Issue about UIImageView Manage by XIB file for iphone5 screen Height and Iphone4 Screen Height.
I Try to Manage code for UIImageView like this
~
CGFloat screenHeight = [UIScreen mainScreen].bounds.size.height;
if ([UIScreen mainScreen].scale == 2.f && screenHeight == 568.0f) {
backgroundImage.autoresizingMask=UIViewAutoresizingFlexibleHeight|UIViewAutoresizingFlexibleWidth;
frameView.autoresizingMask=UIViewAutoresizingFlexibleHeight;
backgroundImage.image = [UIImage imageNamed:#"bg-568h#2x.png"];
//frameView.frame=CGRectMake(16, 0, 288, 527);
frameView.image = [UIImage imageNamed:#"setframe-568h#2x.png"];
}
else
{
backgroundImage.image = [UIImage imageNamed:#"bg#2x.png"];
frameView.image = [UIImage imageNamed:#"setframe#2x.png"];
} ;
Please suggest me about Issues, FrameView is a UIImageView which have white Image,
Please
THanks
I had the same issue and below is what I did to make it work for me.
I have images used in a couple of apps which needed to be resized for the new 4 inch display. I wrote the code below to automatically resize images as needed without specifics on the height of the view. This code assumes the height of the given image was sized in the NIB to be the full height of the given frame, like it is a background image that fills the whole view. In the NIB the UIImageView should not be set to stretch, which would do the work of stretching the image for you and distort the image since only the height changes while the width stays the same. What you need to do is adjust the height and the width by the same delta and then shift the image to the left by the same delta to center it again. This chops off a little on both sides while making it expand to the full height of the given frame.
I call it this way...
[self resizeImageView:self.backgroundImageView intoFrame:self.view.frame];
I do this in viewDidLoad normally if the image is set in the NIB. But I also have images which are downloaded at runtime and displayed that way. These images are cached with EGOCache, so I have to call the resize method either after setting the cached image into the UIImageView or after the image is downloaded and set into the UIImageView.
The code below does not specifically care what the height of the display is. It actually could work with any display size, perhaps to handle resizing images for rotation as well, thought it assumes each time the change in height is greater than the original height. To support a greater width this code would need to be adjusted to respond to that scenario as well.
- (void)resizeImageView:(UIImageView *)imageView intoFrame:(CGRect)frame {
// resizing is not needed if the height is already the same
if (frame.size.height == imageView.frame.size.height) {
return;
}
CGFloat delta = frame.size.height / imageView.frame.size.height;
CGFloat newWidth = imageView.frame.size.width * delta;
CGFloat newHeight = imageView.frame.size.height * delta;
CGSize newSize = CGSizeMake(newWidth, newHeight);
CGFloat newX = (imageView.frame.size.width - newWidth) / 2; // recenter image with broader width
CGRect imageViewFrame = imageView.frame;
imageViewFrame.size.width = newWidth;
imageViewFrame.size.height = newHeight;
imageViewFrame.origin.x = newX;
imageView.frame = imageViewFrame;
// now resize the image
assert(imageView.image != nil);
imageView.image = [self imageWithImage:imageView.image scaledToSize:newSize];
}
- (UIImage *)imageWithImage:(UIImage *)image scaledToSize:(CGSize)newSize {
UIGraphicsBeginImageContextWithOptions(newSize, NO, 0.0);
[image drawInRect:CGRectMake(0, 0, newSize.width, newSize.height)];
UIImage *newImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return newImage;
}
I am trying to implement an NSTextView which resizes to fit its content. I am trying to make it so it has a maximum amount of lines. Meaning, that when this limit is reached, it will not grow any further and the user will be able to scroll it.
There seem to be a lot of people wanting this but I have not found a complete implementation of this.
The idea is to take the content size of the NSTextView and resize it so that it matches. I just can't figure out how to set the layout size of the NSTextView. It does not seem to be it's frame which needs to be set and which one might expect.
Can anyone please tell me how to set the frame of the NSTextView?
It turns out that it's the height of the scroll view which should be changed. Changing the height of an NSTextView can be done by overwriting the -didChangeText method like below.
- (void)didChangeText
{
NSScrollView *scrollView = (NSScrollView *) self.superview.superview;
NSRect frame = scrollView.frame;
// Calculate height
NSUInteger numberOfLines = [self numberOfLines];
NSUInteger height = frame.size.height;
if (numberOfLines <= 13)
{
height = 22 + (numberOfLines - 1) * 14;
if (height < 22)
height = 22;
}
// Update height
frame.size.height = height;
self.superview.superview.frame = frame;
}
Play around with the constants to get the result you wish for.
1.Create a cocoa application (not document-based)
2.Create a new class "StretchView"(subclass NSView)
3.Open the Interface builder and drag a "Scroll view" to the main window
4.Choose the "Scroll view" and set the class "StretchView" (in class identity window)
The size of the contentview is 500*500 and the size of the strechview is also 500*500
(horizontal Scroll is enabled).
Then I start to draw some numbers(1,2,3,4......) horizontally one after the other.
When the number is out of ranger(the x pos is larger than 500) I increase the width
of the StretchView. (Everything works fine up till this point)
Then I tried to make the horizontal scroller to automatically scroll to the end so
that everytime I increase the width of the StretchView the last number coulde be
seen.
Here's the code:
//The timer is called every sec
-(void)myTimerAction:(NSTimer *) timer
{
NSLog(#"myTimerAction");
//......
int i = _myArray.count;
NSRect rect = [self frame];
int width = rect.size.width;
//The width between two number is 10
//When the x pos of current num is bigger then the scroll's width
if((i * 10) > width) {
//reset the width
width = i * 10;
[self setFrameSize:CGSizeMake(width, rect.size.height)];
//How to make it autoscroll???
//...............................
}
//......
[self setNeedsDisplay:YES];
}
Try this:
NSView *contentView = [[self enclosingScrollView] contentView];
CGFloat newXPosition = width - NSWidth([contentView bounds]);
if (newXPosition > 0.0) [self scrollPoint:NSMakePoint(newXPosition, 0.0)];
contentView is the clipping view in the enclosing scroll view. You want to scroll your current view to the x point in your view such that this x point + the clipping view width give the last clipping view width points of your view.