Cocoa 的 NSView 发生疯狂的 mouseDown 事件?

发布于 2024-08-18 05:43:41 字数 2414 浏览 8 评论 0原文

大家好 - 我有一个 NSView 子类,我可以在 mouseDown 上以编程方式移动它。它有效,但有一个奇怪的副作用:

  1. 我单击子视图。子视图移开[GOOD]
  2. 我等一下。我不动鼠标。由于子视图已移动,它不再位于我的光标下方。
  3. 我再次点击鼠标。
    • 我希望底层窗口能够获取 mouseDown 事件(因为子视图不再位于我的光标下方),但是我的子视图以某种方式获取此事件[ODD]
    • mouseDown 事件清楚地表明该点击超出了我的子类的范围[ODD]
    • mouseDown 事件还清楚地显示点击计数已增加,即使我在两次鼠标点击之间等待了几秒钟[ODD]

...必须对我所看到的进行解释。这是我的代码 - 只需创建一个名为“OddMouse”的新 Cocoa 应用程序项目,并将以下内容复制到 OddMouseAppDelegate.h 文件中:

#import <Cocoa/Cocoa.h>
@interface OddMouseAppDelegate : NSObject <NSApplicationDelegate> {
  NSWindow *window;
}
@property (assign) IBOutlet NSWindow *window;
@end

@interface OddView : NSView {
}
@end

... 并将以下内容复制到 OddMouseAppDelegate.m 文件中:

#import "OddMouseAppDelegate.h"
@implementation OddMouseAppDelegate
@synthesize window;
- (void)applicationDidFinishLaunching:(NSNotification *)aNotification {

[[window contentView] addSubview:[[OddView分配]初始化]]; } @end

@implementation OddView
- (id)init {
  self = [super initWithFrame:NSMakeRect(100, 100, 100, 100)];
  return self;
}
- (void)drawRect:(NSRect)dirtyRect {
  NSBezierPath *bz = [NSBezierPath bezierPathWithRoundedRect:[self bounds] 
                                                 xRadius:9 yRadius:9];
  [[NSColor blueColor] set];
[bz fill];
}
- (void)mouseDown:(NSEvent *)event {
  NSPoint locationInMyself = [self convertPoint: [event locationInWindow] 
                                       fromView: nil];
  NSLog(@"MOUSE DOWN COORDS: x=%f y=%f, count=%i", 
          locationInMyself.x, locationInMyself.y, [event clickCount]);
  float newX = [self frame].origin.x+100;
  float newY = [self frame].origin.y+100;
  [self setFrame:NSMakeRect(newX, newY, 100, 100)];
}
@end

...然后构建,然后运行,然后见证! FWIW,这是我在控制台中看到的内容:

10-01-15 11:38:24 PM OddMouse[4583] MOUSE DOWN COORDS: x=48.000000 y=56.000000, count=1
10-01-15 11:38:37 PM OddMouse[4583] MOUSE DOWN COORDS: x=-52.000000 y=-44.000000, count=2
10-01-15 11:38:44 PM OddMouse[4583] MOUSE DOWN COORDS: x=-152.000000 y=-144.000000, count=3
10-01-15 11:38:52 PM OddMouse[4583] MOUSE DOWN COORDS: x=-252.000000 y=-244.000000, count=4
10-01-15 11:39:03 PM OddMouse[4583] MOUSE DOWN COORDS: x=-352.000000 y=-344.000000, count=5

Hullo all - I've got a NSView subclass that I move programmatically on mouseDown. Which works, but has an odd side effect:

  1. I click the subview. The subview moves away [GOOD]
  2. I wait a while. I do not move my mouse. Since the subview has moved it's no longer under my cursor.
  3. I click my mouse again.
    • I expect the underlying window to get the mouseDown event (since the subview is no longer under my cursor), however my subview somehow gets this event [ODD]
    • The mouseDown event clearly shows that the click was outside the bounds of my subclass [ODD]
    • The mouseDown event also clearly shows that the click count has incremented, even though I've waited several seconds between mouse clicks [ODD]

... there's gotta be an explanation for what I'm seeing. Here's my code - simply create a new Cocoa Application project called "OddMouse", and copy the following into the OddMouseAppDelegate.h file:

#import <Cocoa/Cocoa.h>
@interface OddMouseAppDelegate : NSObject <NSApplicationDelegate> {
  NSWindow *window;
}
@property (assign) IBOutlet NSWindow *window;
@end

@interface OddView : NSView {
}
@end

... and the following into the OddMouseAppDelegate.m file:

#import "OddMouseAppDelegate.h"
@implementation OddMouseAppDelegate
@synthesize window;
- (void)applicationDidFinishLaunching:(NSNotification *)aNotification {

[[window contentView] addSubview:[[OddView alloc] init]];
}
@end

@implementation OddView
- (id)init {
  self = [super initWithFrame:NSMakeRect(100, 100, 100, 100)];
  return self;
}
- (void)drawRect:(NSRect)dirtyRect {
  NSBezierPath *bz = [NSBezierPath bezierPathWithRoundedRect:[self bounds] 
                                                 xRadius:9 yRadius:9];
  [[NSColor blueColor] set];
[bz fill];
}
- (void)mouseDown:(NSEvent *)event {
  NSPoint locationInMyself = [self convertPoint: [event locationInWindow] 
                                       fromView: nil];
  NSLog(@"MOUSE DOWN COORDS: x=%f y=%f, count=%i", 
          locationInMyself.x, locationInMyself.y, [event clickCount]);
  float newX = [self frame].origin.x+100;
  float newY = [self frame].origin.y+100;
  [self setFrame:NSMakeRect(newX, newY, 100, 100)];
}
@end

... then build, then run, then witness ! FWIW, here's what I see in the console:

10-01-15 11:38:24 PM OddMouse[4583] MOUSE DOWN COORDS: x=48.000000 y=56.000000, count=1
10-01-15 11:38:37 PM OddMouse[4583] MOUSE DOWN COORDS: x=-52.000000 y=-44.000000, count=2
10-01-15 11:38:44 PM OddMouse[4583] MOUSE DOWN COORDS: x=-152.000000 y=-144.000000, count=3
10-01-15 11:38:52 PM OddMouse[4583] MOUSE DOWN COORDS: x=-252.000000 y=-244.000000, count=4
10-01-15 11:39:03 PM OddMouse[4583] MOUSE DOWN COORDS: x=-352.000000 y=-344.000000, count=5

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想你的星星会说话 2024-08-25 05:43:41

太可怕了 - 事实证明这是双击速度的问题 - 更改首选项做了 SFA,但重新启动解决了......

Freaking heck - turns out this was something misbehaving with the double-click speed - changing the prefs did SFA, but a reboot resolved ...

~没有更多了~
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