My app has NSTextFields for input; I purposely do not use NSNumberFormatter in order to do special handling of input. The app implements "full screen" mode. When the app is in full screen, and the focus is in a text field, and I press the ESC key to resume windowed mode, instead I get a pop-up with spelling suggestions/completions. I don't want either of these behaviors when the ESC key is pressed: A completions pop-up, nor not being able to exit full screen mode. Any suggestions? Thanks.
You need to setup a NSTextFieldDelegate to handle that command, and set the delegate on the textfield. Here's an example:
#property (weak) IBOutlet NSWindow *window;
#property (weak) IBOutlet NSTextField *textField;
#end
#implementation AppDelegate
- (void)applicationDidFinishLaunching:(NSNotification *)aNotification {
// Insert code here to initialize your application
self.textField.delegate = self;
}
- (BOOL)control:(NSControl*)control textView:(NSTextView*)textView doCommandBySelector:(SEL)commandSelector {
if (commandSelector == #selector(cancelOperation:)) {
NSLog(#"handleCancel");
return YES;
}
return NO;
}
```
If you just wanted to eliminate spelling suggestions, you could override the following method, but the above does both.
- (NSArray *)control:(NSControl *)control textView:(NSTextView *)textView completions:(NSArray *)words forPartialWordRange:(NSRange)charRange indexOfSelectedItem:(NSInteger *)index {
return nil;
}
This is how I implemented the behavior that I wanted:
- (BOOL)control:(NSControl *)control textView:(NSTextView *)textView doCommandBySelector:(SEL)commandSelector {
if (commandSelector == #selector(cancelOperation:)) {
if (([_window styleMask] & NSFullScreenWindowMask) == NSFullScreenWindowMask) {
[textView doCommandBySelector:#selector(toggleFullScreen:)];
}
return YES;
}
return NO;
}
Related
There does not seem to be a setTag: for NSTextView.
So if I have multiple NSTextViews, how can I access them without creating iVars for each one?
I know a possibility could be through the delegate... but I have the same problem there: how to identify which NSTextView is messaging?
You can add your own tag property for NSTextView in category and make it editable from Xcode Interface Builder
IB_DESIGNABLE
#interface NSTextView (Tag)
#property (strong, readwrite, nonatomic, nullable) IBInspectable NSString *myTag;
#end
const NSMutableDictionary* tagsMap;
#implementation NSTextView (Tag)
- (void) dealloc {
tagsMap[[NSValue valueWithNonretainedObject:self]] = nil;
}
- (void) setMyTag:(NSString *)myTag {
if (tagsMap == nil) {
tagsMap = [NSMutableDictionary new];
}
tagsMap[[NSValue valueWithNonretainedObject:self]] = myTag;
}
- (NSString*) myTag {
return tagsMap[[NSValue valueWithNonretainedObject:self]];
}
#end
Just adding an approach... simple... but dirty.
When I instantiate say 2 NSTextViews... I set each one with a different fontSize: (49 and 50) and so I can identify them that way.
-(void)textDidChange:(NSNotification *)notification {
NSTextView* textView = (NSTextView *)[notification object];
if ([textView.font isEqualTo:[NSFont systemFontOfSize:49]]) {
NSLog(#"1");
} else if ([textView.font isEqualTo:[NSFont systemFontOfSize:50]])
{
NSLog(#"2");
}
}
I have some trouble with my NSTextField subclass. It's a textfield for input some message. And My application must send this message when my sub-textfield is a first responder and the user presses hotkey Cmd + Enter. I can't use Carbon method RegisterEventHotKey() because many applications use this hotkey for the same action but my application intercepts it. What can I do?
In the text field delegate, you can follow all “standard” commands are sent to the control. Then, once you meet a command noop:, test for current key combination. If it is Command-Enter, do your thing. Something like this should work:
#interface VCEAppDelegate : NSObject <NSApplicationDelegate, NSTextFieldDelegate>
#property (nonatomic, weak) IBOutlet NSTextField *textField;
#end
// .m
#implementation VCEAppDelegate
- (void)applicationDidFinishLaunching:(NSNotification *)aNotification {
self.textField.delegate = self;
}
- (BOOL)isCommandEnterEvent:(NSEvent *)e {
NSUInteger flags = (e.modifierFlags & NSDeviceIndependentModifierFlagsMask);
BOOL isCommand = (flags & NSCommandKeyMask) == NSCommandKeyMask;
BOOL isEnter = (e.keyCode == 0x24); // VK_RETURN
return (isCommand && isEnter);
}
- (BOOL)control:(NSControl *)control textView:(NSTextView *)textView
doCommandBySelector:(SEL)commandSelector {
if ((commandSelector == #selector(noop:)) &&
[self isCommandEnterEvent:[NSApp currentEvent]]) {
[self handleCommandEnter];
return YES;
}
return NO;
}
- (void)handleCommandEnter {
NSLog(#"Do something on Command-Enter");
}
#end
I subclassed NSApplication and override method
- (void) sendEvent:(NSEvent*) event {
if ([event type] == NSKeyDown) {
if (([event modifierFlags] & NSDeviceIndependentModifierFlagsMask) == NSCommandKeyMask) {
if ([event keyCode] == 36) {
if ([self.delegate respondsToSelector:#selector(sendMessage:)]) {
[self.delegate performSelector:#selector(sendMessage:) withObject:nil];
}
}
}
}
[super sendEvent:event];
}
in info.plist I wrote that this sub-NSApplication class is a Principal class. It works!
I've been trying to get this NSTableView to populate for the last 7 hours. I am trying to get a list of all the currently running application and put them into an NSTableView. Eventually I would like to parse the resultes and organize the PID in one column and the Application Bundle in the other. I am getting an EXC_BAD_ACCESS error on " return [listOfWindows objectAtIndex:row];" I am currently using Xcode 4.3.2 and running OS X Lion 10.7.4. Thanks in advance everyone!
#interface AppDelegate : NSObject <NSApplicationDelegate>
{
IBOutlet NSMenu *statusMenu;
IBOutlet NSButton *button;
IBOutlet NSWindow *menuWindow;
IBOutlet NSTableView *proTable;
NSArray *listOfWindows;
IBOutlet NSArrayController *arrayController;
AppDelegate *mainMenu;
NSWorkspace *workSpace;
NSStatusItem *statusItem;
}
#property (assign) IBOutlet NSWindow *window;
-(IBAction)loadConfig:(id)sender;
#end
#import "AppDelegate.h"
#implementation AppDelegate
#synthesize window = _window;
- (void) awakeFromNib
{
[[NSDistributedNotificationCenter defaultCenter] addObserver:self
selector:#selector(loadMenu:)
name:#"WhiteBox"
object:nil];
[self addStatusItem];
//[proTable setDataSource:self];
listOfWindows = [[NSWorkspace sharedWorkspace] runningApplications];
NSLog(#"index %#", listOfWindows);
int y = 0;
y = [listOfWindows count];
NSLog(#"y = %d", y);
[proTable setAllowsMultipleSelection:YES];
}
-(void)applicationWillTerminate
{
NSLog(#"Will Terminate");
}
- (void)applicationDidFinishLaunching:(NSNotification *)aNotification
{
}
-(void)applicationDidResignActive:(NSNotification *)notification
{
NSLog(#"Resign Active");
}
-(void) addStatusItem
{
//Create a variable length status item from the system statusBar
statusItem = [[NSStatusBar systemStatusBar] statusItemWithLength:NSVariableStatusItemLength];
[statusItem retain];
//Set a Title for it
[statusItem setTitle:#"Status Item"];
//Set an Image and an alternate image
//[statusItem setImage:[NSImage imageNamed:#"lnc"]];
//[statusItem setAlternateImage: [NSImage imageNamed:#"status"]];
//Add a Tool Tip
[statusItem setToolTip:#"Status Item Tooltip"];
//Choose to highlight the item when clicked
[statusItem setHighlightMode:YES];
//To Trigger a method on click use the following two lines of code
[statusItem setMenu:statusMenu];
//[statusItem setAction:#selector(loadMenu:)];
}
-(IBAction)loadConfig:(id)sender
{
if(! [menuWindow isVisible] )
{
[menuWindow makeKeyAndOrderFront:sender];
} else {
[menuWindow performClose:sender];
}
}
- (NSInteger)numberOfRowsInTableView:(NSTableView *)tableView
{
return [listOfWindows count];
}
- (id)tableView:(NSTableView *)tableView
objectValueForTableColumn:(NSTableColumn *)tableColumn
row:(NSInteger)row
{
return [listOfWindows objectAtIndex:row];
}
#end
What object is the table view's data source? I don't see any object in the source you posted as implementing the NSTableViewDataSource protocol.
Further, have you tried putting breakpoints in the various data source methods to see if the debugger stops in them? If not, it's usually a good sign that your data source isn't connected to your table view.
I got: -[NSRunningApplication copyWithZone:]: unrecognized selector error when I ran your code. This could be fixed by changing your return line in tableView:objectValueForTableColumn:row: to
return [[listOfWindows objectAtIndex:row]localizedName];
NSRunningApplication doesn't conform to NSCopying, so I don't know if you can put instances of that class in a table view. However, you can get its properties like localizedName, processIdentifier, and bundleIdentifier.
I've run into this problem before with classes that don't implement NSCopying, I'd be happy to know if anyone knows a way to use these classes in table views or outline views.
In xcode last version, I am trying to get the keyDown event of an NSTextField.
However, despite following multiple tutorials on the internet (delegates, controllers...), I still can't receive it.
Any easy hint for me ?
Thanks !
I got sick of all the non answers to do it some other way people so I put my nose down and figured out a way to make this work. This isn't using keydown event directly but it is using the keydown in the block. And the behavior is exactly what I wanted.
Subclass the text field
.h
#interface LQRestrictedInputTextField : NSTextField
.m
In the become first responder setup a local event
static id eventMonitor = nil;
- (BOOL)becomeFirstResponder {
BOOL okToChange = [super becomeFirstResponder];
if (okToChange) {
[self setKeyboardFocusRingNeedsDisplayInRect: [self bounds]];
if (!eventMonitor) {
eventMonitor = [NSEvent addLocalMonitorForEventsMatchingMask:NSKeyDownMask handler:^(NSEvent *event) {
NSString *characters = [event characters];
unichar character = [characters characterAtIndex:0];
NSString *characterString=[NSString stringWithFormat:#"%c",character];
NSArray *validNonAlphaNumericArray = #[#" ",#"(",#")",#"[",#"]",#":",#";",#"\'",#"\"",#".",#"<",#">",#",",#"{",#"}",#"|",#"=",#"+",#"-",#"_",#"?",#"#",
#(NSDownArrowFunctionKey),#(NSUpArrowFunctionKey),#(NSLeftArrowFunctionKey),#(NSRightArrowFunctionKey)];
if([[NSCharacterSet alphanumericCharacterSet] characterIsMember:character] || character == NSCarriageReturnCharacter || character == NSTabCharacter || character == NSDeleteCharacter || [validNonAlphaNumericArray containsObject:characterString ] ) { //[NSCharacterSet alphanumericCharacterSet]
} else {
NSBeep();
event=nil;
}
return event;
} ];
}
}
NSLog(#"become first responder");
return okToChange;
}
remove the event once the textfield editing ends
Also if you're using ARC I noticed you might need to assign the textview string to the stringValue. I nslog'd the stringValue and the value was retained. Without the nslog I had to assign the notification object string to the stringValue to keep it from getting released.
-(void) textDidEndEditing:(NSNotification *)notification {
[NSEvent removeMonitor:eventMonitor];
eventMonitor = nil;
NSTextView *textView=[notification object];
self.stringValue=textView.string;
}
You can subclass NStextField and use keyUp that works for NSTextField.
in .h
#interface MyTextField : NSTextField <NSTextFieldDelegate>
in .m
-(void)keyUp:(NSEvent *)theEvent {
NSLog(#"Pressed key in NStextField!");
}
Add UITextFieldDelegate to your .h like this
#interface ViewController : UIViewController <UITextFieldDelegate> {
Then you can use this to detect every key press in a text field
-(BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string
Return YES to allow the character that was pressed to be inserted into the field but you can add whatever code you need in here.
I can't seem to find a way to get notified when an NSTextField loses focus by pressing the Tab key. I get a nice textDidEndEditing when clicking another control or when pressing Enter, but not if I change the focus by pressing the Tab key.
Also tried to yank KeyDown and doCommandBySelector for this purpose but I got nowhere.
Any ideas?
Thanks in advance
Edit:
Forgot to mention, but I tried resignFirstResponder too. This is the code I tried:
- (BOOL)resignFirstResponder
{
NSRunAlertPanel(#"", #"Lost Focus",#"OK", nil, nil);
return [super resignFirstResponder];
}
- (BOOL)becomeFirstResponder
{
NSRunAlertPanel(#"", #"Got focus",#"OK", nil, nil);
return [super becomeFirstResponder];
}
Strangely, what happens here is that when getting focus, both becomeFirstResponder and resignFirstResponder are called one after the other. But when changing focus away from the control, neither are.
"I get a nice textDidEndEditing when
clicking another control or when
pressing Enter, but not if I change
the focus by pressing the Tab key."
As of April 2011, with OS X 10.6 libs, I'm using:
- (void)controlTextDidEndEditing:(NSNotification *)aNotification
...to listen for NSTextField losing focus, and it's working correctly. Is this possible in your situation? Is it something that used to be broken, but is now fixed by Apple?
If so, it's much less code :).
Ok, I've found a way to do it: use a window delegate to make the window return a custom field editor. This field editor keeps track of the last TextField that's been activated and calls its textDidEndEditting method when losing firstResponder itself. Here's an example of how to do it:
#import <Cocoa/Cocoa.h>
#import <AppKit/AppKit.h>
#interface MyTextField : NSTextField
- (BOOL)resignFirstResponder;
- (void)textDidEndEditing:(NSNotification *)notification;
#end
#interface MyFieldEditor : NSTextView
{
MyTextField * lastBox;
}
-(void) setLastEditBox:(MyTextField*) box;
#end
#interface MyWindowDelegate : NSWindowController
{
MyFieldEditor *fieldEditor;
}
#end
#implementation MyFieldEditor
-(void) setLastEditBox:(MyTextField*) box{ lastBox = box; }
-(id)init
{
if (self = [super init])
[self setFieldEditor:YES];
return self;
}
- (BOOL)resignFirstResponder
{
// Activate the last active editbox editting-end event
if(lastBox != nil)
{
[lastBox textShouldEndEditing:self];
lastBox = nil;
}
return [super resignFirstResponder];
}
#end
#implementation MyWindowDelegate
-(id)windowWillReturnFieldEditor:(NSWindow *)sender toObject:(id)client
{
if(fieldEditor == nil) // Return our special field editor
fieldEditor = [[[MyFieldEditor alloc] autorelease] init];
return fieldEditor;
}
#end
#implementation MyTextField
- (BOOL)resignFirstResponder
{
// We're losing first responder, inform the field editor that this was the last edit box activated
MyFieldEditor* myTf = (MyFieldEditor*) [[self window] fieldEditor:YES forObject:self];
[myTf setLastEditBox:self];
return [super resignFirstResponder];
}
- (void)textDidEndEditing:(NSNotification *)notification;
{
[super textDidEndEditing:notification];
[self setStringValue:#"RECEIVED ENDEDITING"];
}
#end
int main(int argc, char *argv[])
{
NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
NSApplication *app = [NSApplication sharedApplication];
NSRect frame = NSMakeRect(100, 100, 200, 150);
// Create the window
NSWindow* window = [[[NSWindow alloc] autorelease ] initWithContentRect:frame styleMask:NSClosableWindowMask|NSResizableWindowMask
backing:NSBackingStoreBuffered defer:NO];
[window setDelegate:[[MyWindowDelegate alloc] autorelease]];
MyTextField * tf = [ [[ MyTextField alloc ] autorelease] initWithFrame: NSMakeRect( 30.0, 100.0, 150.0, 22.0 ) ];
[ [ window contentView ] addSubview: tf ];
MyTextField * tf2 = [ [[ MyTextField alloc ] autorelease] initWithFrame: NSMakeRect( 30.0, 40.0, 150.0, 22.0 ) ];
[ [ window contentView ] addSubview: tf2 ];
[window makeKeyAndOrderFront: window];
[app run];
[pool release];
return 0;
}
You have to do only this
For key Tab
self.textfield.delegate = self;
and then implement this method
- (void)control:(NSControl *)control textView:(NSTextView *)fieldEditor doCommandBySelector:(SEL)commandSelector
{
NSLog(#"Selector method is (%#)", NSStringFromSelector( commandSelector ) );
if (commandSelector == #selector(insertTab:)) {
//Do something against TAB key
//Or Call a Method
}
}
or see my answer at
Execute an Action when the Enter-Key is pressed in a NSTextField?
With the understanding that I mentioned in my other post, I figured out an answer. It's a little convoluted but it works. You have to subclass both the NSTextField and the NSWindow because you need information from both to set this up. Here's the subclasses:
HMTextField.h
#import <Foundation/Foundation.h>
#interface HMTextField : NSTextField {
}
#end
HMTextField.m
#import "HMTextField.h"
#import "HMWindow.h"
#implementation HMTextField
- (BOOL)becomeFirstResponder {
[(HMWindow*)[self window] setTfBecameFirstResponder:YES];
return [super becomeFirstResponder];
}
#end
HMWindow.h
#import <Foundation/Foundation.h>
#interface HMWindow : NSWindow {
BOOL tfIsFirstResponder, tfBecameFirstResponder;
}
#property (nonatomic, readwrite, assign) BOOL tfBecameFirstResponder;
#end
HMWindow.m
#import "HMWindow.h"
#implementation HMWindow
#synthesize tfBecameFirstResponder;
-(id)init {
if (self = [super init]) {
tfIsFirstResponder = NO;
}
return self;
}
- (NSResponder *)firstResponder {
id fr = [super firstResponder];
if ([fr isEqualTo:[self fieldEditor:NO forObject:nil]]) {
tfIsFirstResponder = YES;
} else {
if (tfIsFirstResponder && tfBecameFirstResponder) {
NSLog(#"the text field stopped being first responder");
tfBecameFirstResponder = NO;
}
tfIsFirstResponder = NO;
}
return fr;
}
#end
Make the classes and make your objects their class. You'll be notified of the first responder change from your text field where the NSLog message is in the HMWindow.m file. If you need help understanding how it works let me know.
Here's an example of how to indicate the appropriate time a custom NSTextFieldCell (NSCell) should draw its own bezel & focus ring (in the method [NSTextFieldCell drawWithFrame: inView]), by 'borrowing' the cell's highlight field, setting it when the text field gains focus, and clearing it when the text field loses focus (editing completes).
This technique overcomes some problems:
The cell can't easily determine if it has focus.
The cell can't easily determine which higher level component (e.g. text field or button) it belongs to to track via its parent
NSTextField can instantaneously resign first responder after gaining it, which could make it seem like it lost user focus when it didn't.
Since we're re-purposing the cell's "highlighted" state field, in order to communicate the focus state to the cell, be sure to return nil from the custom NSTextFieldCell's [highlightColorWithFrame: inView:] method.
#import "CustomTextField.h"
#implementation CustomTextField
-(BOOL)becomeFirstResponder {
((NSTextFieldCell *)self.cell).highlighted = true;
return [super becomeFirstResponder];
}
-(void)textDidEndEditing:(NSNotification *)notification {
((NSTextFieldCell *)self.cell).highlighted = false;
[super textDidEndEditing:notification];
}
#end
Complex answers. There is a simpler way to do it.
Don't forget to subclass your NSTextField to NotificableTextField and set its delegate to your view controller.
NotificableTextField.h:
#import <Cocoa/Cocoa.h>
#protocol NotificableTextFieldDelegate <NSObject>
#optional
- (void)textFieldStartedEditing:(NSTextField *)textField;
- (void)textFieldEndedEditing:(NSTextField *)textField;
#end
#interface NotificableTextField : NSTextField
#end
NotificableTextField.m:
#import "NotificableTextField.h"
#implementation NotificableTextField
- (void)awakeFromNib
{
[super awakeFromNib];
self.target = self;
self.action = #selector(inputEnd);
}
- (BOOL)becomeFirstResponder
{
BOOL status = [super becomeFirstResponder];
if (status && [self.delegate respondsToSelector:#selector(textFieldStartedEditing:)])
[(id<NotificableTextFieldDelegate>)self.delegate textFieldStartedEditing:self];
return status;
}
- (void)inputEnd
{
if ([self.delegate respondsToSelector:#selector(textFieldEndedEditing:)])
[(id<NotificableTextFieldDelegate>)self.delegate textFieldEndedEditing:self];
}
#end
NSTextField is a subclass of NSResponder. NSResponder has a method - (BOOL)resignFirstResponder. That will notify you when the NSTextField is no longer first responder... ie. loses focus. So subclass your NSTextField and do your stuff in there.