I have a little popup window used for selecting images sorted by groups, and I would like to add a selection box around whatever image is being hovered over. I am trying to this by overriding the mouseMoved event for the window but it seems that a window that has a border-less style mask receives no mouseMoved events even if you have set setAcceptsMouseMoved events to YES. Is there anyway to make a borderless window receive this events?
You need to allow the window to become the key window. By default, borderless windows cannot become key. Subclass NSWindow and override -canBecomeKeyWindow:
- (BOOL)canBecomeKeyWindow
{
return YES;
}
Aternatively, you can use an NSTrackingArea to do your mouse tracking, which may be easier/better anyway.
Related
I want to create a borderless window floating above the main window. The main window should be the key window (I want it to handle the keyboard and mouse events). Also, the floating window should close as the user clicks outside of it. Basically, I'm creating a very custom context menu, just like NSMenu. It should behave likewise.
So I created my window this way:
NSWindow *menuWindow = [NSWindow windowWithContentViewController:menuViewController];
menuWindow.styleMask = NSBorderlessWindowMask;
menuWindow.level = NSFloatingWindowLevel;
[menuWindow makeKeyAndOrderFront:self];
That works perfectly, but how do I handle clicks outside to close it? The window doesn't invoke delegate's windowDidResignKey, because it's not a key window. If it does overload canBecomeKeyWindow (so that it returns YES), then the floating window grabs the user input, which is not what I want.
So, is there any way to automatically close a borderless window? Can NSPanel help? I tried using it, but with no success (the becomesKeyOnlyIfNeeded selector doesn't do what I need).
To detect clicks outside the window but within your app, you could install an event monitor using +[NSEvent addLocalMonitorForEventsMatchingMask:handler:]. If you also want to close the window when the user clicks in a different app, you could observe the NSApplicationDidResignActiveNotification notification.
NSWindow has a property hidesOnDeactivate that should do this for you.
From the Apple Docs:
The value of this property is true if the window is removed from the
screen when its application is deactivated; false if it remains
onscreen. The default value for NSWindow is false; the default value
for NSPanel is true.
How do I show resize indicators for an NSWindow without Titlebar?
I created a new Xcode project(for Mac app) with storyboard. I just disabled the checkbox Title Bar in Appearance(It hides the Title bar of NSwindow).
The strange thing was, after disabling the TitleBar, NSWindow was not showing resize indicators while mouse was above the window edges. Although if I drag at edges it was resizing.
I guess this is a bug, because if the window can be resized by dragging the mouse over edges, it must show the resize indicators.
As it can be seen in the image, the resize indicators are seen after user drags the window, but many users would think that since there is no resize indicator, the window is not resizable.
I've fixed this issue by subclassing NSWindow and overriding canBecomeKeyWindow to return YES:
#import "MyWindow.h"
#implementation MyWindow
- (BOOL)canBecomeKeyWindow {
return YES;
}
#end
Not updating resize cursors in this case looks like Apple bug. Documentation states "The value of canBecomeKeyWindow property is YES if the window has a title bar or a resize bar, or NO otherwise.", so I expect that canBecomeKeyWindow will return YES for resizable window. But it doesn't.
UPD: Checked on 10.10.5. Hopefully, you will have same behaviour on 10.11.
I have not checked this, but you could set the resize indicators manually. I think I would add four NSTrackingAreas to the windows contentView subclass (one for each side of the window, only few pixels in height/width).
In the mouseEntered() method, create a new NSCursor object for the appropriate mouse position. Remember that the position could change, so use the mouseMoved() method as well.
On mouseExited() reset the cursor.
Again, I have not tried this, but it should work.
PS: Don't forget to file a radar on this ;)
I have noticed when an apps window contains an Outline view (such as XCode) it changes color when that window is in focus. With XCode for example, if the window is current then the outline view has a blueish background, if it looses focus it goes grey,
Can anyone help me to replicate this? I presume its something to do with drawRect: but can only manage to get the color to change when the window loads.
Maybe its a built in function and I'm just missing something?
All you have to do in your -drawRect: is check whether the window has main status and draw accordingly:
- (void)drawRect:(NSRect)rect
{
if ([[self window] isMainWindow]) {
// draw active appearance
} else {
// draw inactive appearance
}
}
A window's delegate gets messages whenever a window gets or resigns main or key window status. You can implement the appropriate methods (like -windowDidBecomeMain: and -windowDidResignMain:) in your window delegate to update the window and its subviews as necessary.
I am making an image picker that will display an n by n grid of selectable button when the picker is popped up. This grid of buttons will be contained within an NSWindow but I would like for the window to be close automatically if the user clicks off the screen. Is there a flag that can be set so that when the window looses focus it will be closed automatically?
There are two notifications that you may be interested in: NSWindowDidResignKeyNotification and NSWindowDidResignMainNotification. You can simply register for the one you're interested in in awakeFromNib (or windowDidLoad if you have a custom controller) and then close or hide the window as appropriate when you receive the notifications.
I won't delve too much into whether or not this is a good idea from UI standpoint. But, it might be a better idea to have either an overlay view or a panel for the functionality you describe.
You might check out NSPanel. It's an NSWindow subclass that will hide itself when the app is in the background, and that behavior sounds very similar to what you are looking for.
Is it possible to launch a window in an NSView subclass by clicking a NSRect? I have tried makeKeyAndOrderFront but this doesn't work.
You can't click on a rectangle. A rectangle is just four numbers.
You can have an NSView that responds to clicks, but you should consider using NSButton instead. If you really want a custom view, you can both create the button and add it as a subview of your view programmatically. Then, set the button's target to yourself and its action to the selector of a message you'll respond to by opening the window.
One more thing: You don't launch a window. Windows aren't applications and applications aren't windows. On Mac OS X, applications have windows—always more than one (counting at least the About panel). So, you'll load the window from a nib, then make it key (respond to events) and order it front.
On that point: You probably should not have your view owning a window. Consider making a controller object to own the window instead, and having your view simply forward the message to the controller object (or even hook the button up to the controller directly).