Drag a window by clicking on image view

Scripting Forums AppleScriptObjC and Xcode
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#1

The window I’m using has an image view that takes up the entire view and when u click the image to try and drag the window you cant. How would you allow the image view to let the window drag when u click the image?

#2

Have you tried setting Refuses First Responder in IB?

#3

How do you do that, that isn’t one of the options in the attributes inspector.

#4

It is here – under State, just below Enabled and Continuous.

#5

Ok, but those options are not available for an NSImageview

#6

I think you need to override the default method mouseDownCanMoveWindow, which has to be done in an Objective-C file. I was able to do it like this in a project named Drag:

Add a new file of the Objective-C class and make the files look like this:

//  C_Drag.h
//  Drag
//

#import <Cocoa/Cocoa.h>

@interface C_Drag : NSImageView {
}
@end


//  C_Drag.m
//  Drag
//

#import "C_Drag.h"

@implementation C_Drag

-(BOOL)mouseDownCanMoveWindow {
    return YES;
}
@end

The only thing I did in the .h file was to change the superclass of my class to NSImageView. In the .m file I put in the new implementation of the mouseDownCanMoveWindow method that overrides the NSImageView class method which returns NO.

In the nib, I dragged an Image Well into my window and changed its class to C_Drag (the name of my Obj-C file). My applescript looks like this (notice its parent property is set to C_Drag):

script DragAppDelegate
	property parent : class "C_Drag"
	property NSImage : class "NSImage"
	property myWindow : missing value
	property myView : missing value
	
	on applicationWillFinishLaunching_(aNotification)
		myWindow's setMovableByWindowBackground_(1)
		myView's setImage_(NSImage's imageNamed_("s11.tiff"))
		myView's setImageScaling_(1)
	end applicationWillFinishLaunching_
end script

The setMovableByWindowBackground_ method makes the window draggable anywhere inside it, but not over an image view unless you do the override like we did above.

#7

You can also override mouseDownCanMoveWindow in AS, by subclassing NSImageView. Just make a new AS class, make it’s parent NSImageView instead of NSObject, add the handler, and then change the class of the image view to the new class.