As the screenshot shows, after select an image for slider, it is not draggable. The only way to adjust its position is through the fill mode. How can I adjust its position more accurately? For example, align the image and the container's bottom left corner
Related
I am trying to draw a bounding box around the monkey's face in this image. The coordinates I want to use are the following:
64,111
347,111,
64,304,
347,304
I am displaying the image with resizeMode = contain which results in the bounding box being misplaced and the wrong size.
I think the top-left of the rectangle should be at 64,111 using position absolute and the width and height should just be the difference between the points (width = 283 and height = 193). I know that since the image is not being displayed at its full height and width I need to scale down the bounding box accordingly. However, I can't figure out what the image's final size is after it has been resized. How can I figure this out in order to display my bounding box correctly?
Here is my code so far: https://snack.expo.dev/#melampus123/forlorn-raisins
See the images below. One is at 78% zoom but the whole content is zoomed out but not stretching to its parent control despite having Horizontal and Vertical Alignment set to "stretch".
ScrollViewer is in a GridColumn and GridRow and the Grid is being loaded into a Frame which is a part of the NavigationView on the mainpage.
Desired effect is for the content to get smaller but fit to the width and height to show more columns in this case.
See the images below. One is at 78% zoom but the whole content is zoomed out but not stretching to its parent control despite having Horizontal and Vertical Alignment set to "stretch".
This behavior of ScrollViewer is by-deign, derive from the screenshot the DataGrid is a whole place. When we zoom in or out, The DataGrid will zoom overall. For the requirement, you could edit the DataGrid's MaxColumnWidth property when zoom.
I'm trying to make an NSTextField with only two rounded corners on the top-left and bottom-left. I tried to do the following, but in this case I get all corners rounded:
[self.myTextField:YES];
self.myTextField.layer.cornerRadius = 5;
What should I do to have only two (or for example one) rounded corners?
I'm a little out of my lane in OS X, but what you want to do is embed whatever corner art you like into an image and present those on an image view behind the NSTextField.
Resize the image view exactly as you do the text field, but first set the image's capInsets property. Size the insets to exclude the corners from scaling as the extent of the image changes. (Make sure your corner art is placed at the extreme edges of the image).
I am trying to render the image of a scroll view even to the areas which is outside the visible area of the screen. I am resizing the frame of the scroll view to include the content size width and height.After resizing, I am doing a renderInContext and finally taking the image by UIGraphicsGetImageFromCurrentImageContext.
All I am getting is a square box of black color of certain bytes. If i do not resize the frame of the view, i get the image with incorrect frame.
Does changing the frame affect renderInContext? What can i do to get the correct image after resizing?
I'm wondering what the dropdown "Mode" is about? It contains "Scale to fill", "Aspect fit" and so on. I never had to change it so far, still I'm curious what it can be used for. Can somebody explain?
The content mode property of a view tells how its content should be laid out. In the Interface Builder, the various modes can be selected in the Attributes Inspector.
Let's use two image views to see how the various modes work.
Scale to Fill
The image heights and widths are stretched to match the size of the UIImageView.
Aspect Fit
The longest side (either height or width) of the image is stretched to match the view. This makes the image as big as possible while still showing the entire image and not distorting the height or width. (I set the UIImageView background to blue so that its size is clear.)
Aspect Fill
The shortest side (either height or width) of the image is stretched to match the view. Like "Aspect Fit", the proportions of the image are not distorted from their original aspect ratio.
Redraw
Redraw is only for custom views that need to do their own scaling and resizing. We aren't using a custom view, so we shouldn't use Redraw. Notice that here UIImageView just gives us the same result as Scale to Fill, but it is doing more work behind the scenes.
About Redraw, the documentation says:
Content modes are good for recycling the contents of your view, but you can also set the content mode to the UIViewContentModeRedraw value when you specifically want your custom views to redraw themselves during scaling and resizing operations. Setting your view’s content mode to this value forces the system to call your view’s drawRect: method in response to geometry changes. In general, you should avoid using this value whenever possible, and you should certainly not use it with the standard system views.
Center
The image is centered in the view, but the length and width of the image are not stretched.
Top
The top edge of the image is centered horizontally at the top of the view, and the length and width of the image are not stretched.
Bottom
The bottom edge of the image is centered horizontally at the bottom of the view, and the length and width of the image are not stretched.
Left
The left edge of the image is centered vertically at the left of the view, and the length and width of the image are not stretched.
Right
The right edge of the image is centered vertically at the right of the view, and the length and width of the image are not stretched.
Top Left
The top left corner of the image is placed at the top left corner of the view. The length and width of the image are not stretched.
Top Right
The top right corner of the image is placed at the top right corner of the view. The length and width of the image are not stretched.
Bottom Left
The bottom left corner of the image is placed at the bottom left corner of the view. The length and width of the image are not stretched.
Bottom Right
The bottom right corner of the image is placed at the bottom right corner of the view. The length and width of the image are not stretched.
Notes
If the content (in our case the image) is the same size as the view (in our case the UIImageView), then changing the content mode will make no noticeable difference.
See this and this question for a discussion about content modes for views other than UIImageView.
In Swift, to set to set the content mode programmatically you do the following:
imageView.contentMode = UIViewContentMode.ScaleToFill
imageView.contentMode = UIViewContentMode.ScaleAspectFit
imageView.contentMode = UIViewContentMode.ScaleAspectFill
imageView.contentMode = UIViewContentMode.Redraw
imageView.contentMode = UIViewContentMode.Center
imageView.contentMode = UIViewContentMode.Top
imageView.contentMode = UIViewContentMode.Bottom
imageView.contentMode = UIViewContentMode.Left
imageView.contentMode = UIViewContentMode.Right
imageView.contentMode = UIViewContentMode.TopLeft
imageView.contentMode = UIViewContentMode.TopRight
imageView.contentMode = UIViewContentMode.BottomLeft
imageView.contentMode = UIViewContentMode.BottomRight
View Programming Guide goes into details of what you're asking about. If you scroll down to the section called "Content Modes" you'd find what you're looking for.
Basically according to Apple:
"Each view has a content mode that controls how the view recycles its content in response to changes in the view’s geometry [...] the value in the contentMode property determines whether the bitmap should be scaled to fit the new bounds or simply pinned to one corner or edge of the view."
http://vocaro.com/trevor/blog/2009/10/12/resize-a-uiimage-the-right-way/
should give you the basic ideas very well.