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我创建了一个本地事件循环，并且出现了一个无边框窗口（派生自NSPanel）， 我发现事件循环中没有收到NSMouseMoved事件，尽管我可以接收鼠标按钮向下/向上事件。可可nextEventMatchingMask没有收到NSMouseMoved事件
我应该怎么做才能获得NSMouseMoved事件？我发现将浮动窗口作为关键窗口可以接收NSMouseMoved事件，但我不想更改关键窗口。看起来这是可能的，因为我在单击System Dock Bar中的测试应用程序图标后发现，我可以接收mousemoved事件，并且关键窗口/主窗口未更改。
这里是我的测试代码：（创建一个可可应用程序项目名称FloatWindowTest，并把一个按钮，用的onClick链接：IBAction为）。 在此先感谢！
-Jonny
#import "FloatWindowTestAppDelegate.h"
@interface FloatWindow : NSPanel
@end
@interface FloatWindowContentView : NSView
@end
@implementation FloatWindowTestAppDelegate
@synthesize window;
- (void)delayedAction:(id)sender
{
// What does this function do?
// 1. create a float window
// 2. create a local event loop
// 3. print out the events got from nextEventMatchingMask.
// 4. send it to float window.
// What is the problem?
// In local event loop, althrough the event mask has set NSMouseMovedMask
// there's no mouse moved messages received.
//
FloatWindow* floatWindow = [[FloatWindow alloc] init];
NSEvent* event = [NSApp currentEvent];
NSPoint screenOrigin = [[self window] convertBaseToScreen:[event locationInWindow]];
[floatWindow setFrameTopLeftPoint:screenOrigin];
[floatWindow orderFront:nil];
//Making the float window as Key window will work, however
//change active window is not anticipated.
//[floatWindow makeKeyAndOrderFront:nil];
BOOL done = NO;
while (!done)
{
NSAutoreleasePool* pool = [NSAutoreleasePool new];
NSUInteger eventMask = NSLeftMouseDownMask|
NSLeftMouseUpMask|
NSMouseMovedMask|
NSMouseEnteredMask|
NSMouseExitedMask|
NSLeftMouseDraggedMask;
NSEvent* event = [NSApp nextEventMatchingMask:eventMask
untilDate:[NSDate distantFuture]
inMode:NSDefaultRunLoopMode
dequeue:YES];
//why I cannot get NSMouseMoved event??
NSLog(@"new event %@", [event description]);
[floatWindow sendEvent:event];
[pool drain];
}
[floatWindow release];
return;
}
-(IBAction)onClick:(id)sender
{
//Tried to postpone the local event loop
//after return from button's mouse tracking loop.
//but not fixes this problem.
[[NSRunLoop currentRunLoop]
performSelector:@selector(delayedAction:)
target:self
argument:nil
order:0
modes:[NSArray arrayWithObject:NSDefaultRunLoopMode]];
}
@end
@implementation FloatWindow
- (id)init
{
NSRect contentRect = NSMakeRect(200,300,200,300);
self = [super initWithContentRect:contentRect
styleMask:NSTitledWindowMask
backing:NSBackingStoreBuffered
defer:YES];
if (self) {
[self setLevel:NSFloatingWindowLevel];
NSRect frameRect = [self frameRectForContentRect:contentRect];
NSView* view = [[[FloatWindowContentView alloc]
initWithFrame:frameRect] autorelease];
[self setContentView:view];
[self setAcceptsMouseMovedEvents:YES];
[self setIgnoresMouseEvents:NO];
}
return self;
}
- (BOOL)becomesKeyOnlyIfNeeded
{
return YES;
}
- (void)becomeMainWindow
{
NSLog(@"becomeMainWindow");
[super becomeMainWindow];
}
- (void)becomeKeyWindow
{
NSLog(@"becomeKeyWindow");
[super becomeKeyWindow];
}
@end
@implementation FloatWindowContentView
- (BOOL)acceptsFirstMouse:(NSEvent *)theEvent
{
return YES;
}
- (BOOL)acceptsFirstResponder
{
return YES;
}
- (id)initWithFrame:(NSRect)frameRect
{
self = [super initWithFrame:frameRect];
if (self) {
NSTrackingArea* area;
area = [[NSTrackingArea alloc] initWithRect:frameRect
options:NSTrackingActiveAlways|
NSTrackingMouseMoved|
NSTrackingMouseEnteredAndExited
owner:self
userInfo:nil];
[self addTrackingArea:area];
[area release];
}
return self;
}
- (void)drawRect:(NSRect)rect
{
[[NSColor redColor] set];
NSRectFill([self bounds]);
}
- (BOOL)becomeFirstResponder
{
NSLog(@"becomeFirstResponder");
return [super becomeFirstResponder];
}
@end