Custom drawing in IKImageBrowserView fails
Hi list,
i'm trying to override an IKImageBrowserView to do some custom drawing but i'm
stuck.
What i try to accomplish is that when the view contains zero items, some custom
drawing happens like drawing an NSAttributedString that says Drop items
here...
Problem is that my drawing code gets never called.
Here's the drawRect method of my IKImageBrowserView:
- (void)drawRect:(NSRect)rect
{
[super drawRect:rect];
NSUInteger numItems = [[self dataSource]
numberOfItemsInImageBrowser:self];
if(numItems = 0)
{
NSLog(@No items in me); // This gets called, so i'm sure the
above code works
NSRect bounds = [self bounds];
bounds.size.width = 200;
bounds.size.height = 200;
bounds.origin.x += 200;
bounds.origin.y += 200;
//[NSGraphicsContext saveGraphicsState];
[[NSColor yellowColor] set]; // Just for testing purposes
NSRectFill(bounds);
//[NSGraphicsContext restoreGraphicsState];
}
}
Uncommenting the NSGrahicsContext doesn't help either.
Anyone has any ideas or workarounds for this?
Thanks in advance,
Florian
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Re: Custom drawing in IKImageBrowserView fails
Hi Florian,
You can't do custom drawing this way (because the IKImageBrowserView renders
into an openGL surface, so AppKit or CoreGraphics calls won't do anything).
So to do what you want you can either:
- make the view layer backed and add a sub-layer
- add an overlay transparent window on top of the image browser view
- add an overlay layer with setForegroundLayer: (that's the easiest solution
but it is SnowLeopard only).
-- Thomas
On Nov 25, 2009, at 2:34 PM, Florian Soenens wrote:
Hi list,
i'm trying to override an IKImageBrowserView to do some custom drawing but
i'm stuck.
What i try to accomplish is that when the view contains zero items, some
custom drawing happens like drawing an NSAttributedString that says Drop
items here...
Problem is that my drawing code gets never called.
Here's the drawRect method of my IKImageBrowserView:
- (void)drawRect:(NSRect)rect
{
[super drawRect:rect];
NSUInteger numItems = [[self dataSource]
numberOfItemsInImageBrowser:self];
if(numItems = 0)
{
NSLog(@No items in me); // This gets called, so i'm sure the
above code works
NSRect bounds = [self bounds];
bounds.size.width = 200;
bounds.size.height = 200;
bounds.origin.x += 200;
bounds.origin.y += 200;
//[NSGraphicsContext saveGraphicsState];
[[NSColor yellowColor] set]; // Just for testing purposes
NSRectFill(bounds);
//[NSGraphicsContext restoreGraphicsState];
}
}
Uncommenting the NSGrahicsContext doesn't help either.
Anyone has any ideas or workarounds for this?
Thanks in advance,
Florian
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Re: Custom drawing in IKImageBrowserView fails
Also, you could try swapping out the image browser (or making it hidden) when
it is empty, and display an alternative placeholder view in its place.
Also, file a bug report requesting the ability to do this built-in.
On 25 Nov 2009, at 13:44, Thomas Goossens wrote:
Hi Florian,
You can't do custom drawing this way (because the IKImageBrowserView renders
into an openGL surface, so AppKit or CoreGraphics calls won't do anything).
So to do what you want you can either:
- make the view layer backed and add a sub-layer
- add an overlay transparent window on top of the image browser view
- add an overlay layer with setForegroundLayer: (that's the easiest solution
but it is SnowLeopard only).
-- Thomas
On Nov 25, 2009, at 2:34 PM, Florian Soenens wrote:
Hi list,
i'm trying to override an IKImageBrowserView to do some custom drawing but
i'm stuck.
What i try to accomplish is that when the view contains zero items, some
custom drawing happens like drawing an NSAttributedString that says Drop
items here...
Problem is that my drawing code gets never called.
Here's the drawRect method of my IKImageBrowserView:
- (void)drawRect:(NSRect)rect
{
[super drawRect:rect];
NSUInteger numItems = [[self dataSource]
numberOfItemsInImageBrowser:self];
if(numItems = 0)
{
NSLog(@No items in me); // This gets called, so i'm sure the
above code works
NSRect bounds = [self bounds];
bounds.size.width = 200;
bounds.size.height = 200;
bounds.origin.x += 200;
bounds.origin.y += 200;
//[NSGraphicsContext saveGraphicsState];
[[NSColor yellowColor] set]; // Just for testing purposes
NSRectFill(bounds);
//[NSGraphicsContext restoreGraphicsState];
}
}
Uncommenting the NSGrahicsContext doesn't help either.
Anyone has any ideas or workarounds for this?
Thanks in advance,
Florian
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Re: Custom drawing in IKImageBrowserView fails
Hi Thomas,
thanks for the reply, i did try the first method you suggest with
adding a layer but it didn't work either.
I also tought of the second method but how would i make sure that my
IKImageBrowserView still receives drop event?
I ned to be compatible with 10.5 so method 3 is out of the question.
Thanks anyway!
Florian.
On 25 Nov 2009, at 14:44, Thomas Goossens wrote:
Hi Florian,
You can't do custom drawing this way (because the IKImageBrowserView
renders into an openGL surface, so AppKit or CoreGraphics calls
won't do anything).
So to do what you want you can either:
- make the view layer backed and add a sub-layer
- add an overlay transparent window on top of the image browser view
- add an overlay layer with setForegroundLayer: (that's the easiest
solution but it is SnowLeopard only).
-- Thomas
On Nov 25, 2009, at 2:34 PM, Florian Soenens wrote:
Hi list,
i'm trying to override an IKImageBrowserView to do some custom
drawing but i'm stuck.
What i try to accomplish is that when the view contains zero items,
some custom drawing happens like drawing an NSAttributedString that
says Drop items here...
Problem is that my drawing code gets never called.
Here's the drawRect method of my IKImageBrowserView:
- (void)drawRect:(NSRect)rect
{
[super drawRect:rect];
NSUInteger numItems = [[self dataSource]
numberOfItemsInImageBrowser:self];
if(numItems = 0)
{
NSLog(@No items in me); // This gets called, so i'm sure the
above code works
NSRect bounds = [self bounds];
bounds.size.width = 200;
bounds.size.height = 200;
bounds.origin.x += 200;
bounds.origin.y += 200;
//[NSGraphicsContext saveGraphicsState];
[[NSColor yellowColor] set]; // Just for testing purposes
NSRectFill(bounds);
//[NSGraphicsContext restoreGraphicsState];
}
}
Uncommenting the NSGrahicsContext doesn't help either.
Anyone has any ideas or workarounds for this?
Thanks in advance,
Florian
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Re: Custom drawing in IKImageBrowserView fails
On 25 Nov 2009, at 14:06, Florian Soenens wrote:
Hi Thomas,
thanks for the reply, i did try the first method you suggest with adding a
layer but it didn't work either.
I also tought of the second method but how would i make sure that my
IKImageBrowserView still receives drop event?
You should be able to set the overlay to be invisible to mouse events etc.
quite easily.
I ned to be compatible with 10.5 so method 3 is out of the question.
Thanks anyway!
Florian.
On 25 Nov 2009, at 14:44, Thomas Goossens wrote:
Hi Florian,
You can't do custom drawing this way (because the IKImageBrowserView renders
into an openGL surface, so AppKit or CoreGraphics calls won't do anything).
So to do what you want you can either:
- make the view layer backed and add a sub-layer
- add an overlay transparent window on top of the image browser view
- add an overlay layer with setForegroundLayer: (that's the easiest solution
but it is SnowLeopard only).
-- Thomas
On Nov 25, 2009, at 2:34 PM, Florian Soenens wrote:
Hi list,
i'm trying to override an IKImageBrowserView to do some custom drawing but
i'm stuck.
What i try to accomplish is that when the view contains zero items, some
custom drawing happens like drawing an NSAttributedString that says Drop
items here...
Problem is that my drawing code gets never called.
Here's the drawRect method of my IKImageBrowserView:
- (void)drawRect:(NSRect)rect
{
[super drawRect:rect];
NSUInteger numItems = [[self dataSource]
numberOfItemsInImageBrowser:self];
if(numItems = 0)
{
NSLog(@No items in me); // This gets called, so i'm sure the
above code works
NSRect bounds = [self bounds];
bounds.size.width = 200;
bounds.size.height = 200;
bounds.origin.x += 200;
bounds.origin.y += 200;
//[NSGraphicsContext saveGraphicsState];
[[NSColor yellowColor] set]; // Just for testing purposes
NSRectFill(bounds);
//[NSGraphicsContext restoreGraphicsState];
}
}
Uncommenting the NSGrahicsContext doesn't help either.
Anyone has any ideas or workarounds for this?
Thanks in advance,
Florian
___
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Re: Custom drawing in IKImageBrowserView fails
Thanks to all for the help.
i went with Mike's solution of swapping view.
I wrapped the IKImageBrowserView into a Tabless NSTabview with in the second
tab my dropview.
I will also file the bug report as Mike suggested.
Thanks!
On Wednesday, November 25, 2009, at 03:34PM, Mike Abdullah
cocoa...@mikeabdullah.net wrote:
On 25 Nov 2009, at 14:06, Florian Soenens wrote:
Hi Thomas,
thanks for the reply, i did try the first method you suggest with adding a
layer but it didn't work either.
I also tought of the second method but how would i make sure that my
IKImageBrowserView still receives drop event?
You should be able to set the overlay to be invisible to mouse events etc.
quite easily.
I ned to be compatible with 10.5 so method 3 is out of the question.
Thanks anyway!
Florian.
On 25 Nov 2009, at 14:44, Thomas Goossens wrote:
Hi Florian,
You can't do custom drawing this way (because the IKImageBrowserView
renders into an openGL surface, so AppKit or CoreGraphics calls won't do
anything).
So to do what you want you can either:
- make the view layer backed and add a sub-layer
- add an overlay transparent window on top of the image browser view
- add an overlay layer with setForegroundLayer: (that's the easiest
solution but it is SnowLeopard only).
-- Thomas
On Nov 25, 2009, at 2:34 PM, Florian Soenens wrote:
Hi list,
i'm trying to override an IKImageBrowserView to do some custom drawing but
i'm stuck.
What i try to accomplish is that when the view contains zero items, some
custom drawing happens like drawing an NSAttributedString that says Drop
items here...
Problem is that my drawing code gets never called.
Here's the drawRect method of my IKImageBrowserView:
- (void)drawRect:(NSRect)rect
{
[super drawRect:rect];
NSUInteger numItems = [[self dataSource]
numberOfItemsInImageBrowser:self];
if(numItems = 0)
{
NSLog(@No items in me); // This gets called, so i'm sure the
above code works
NSRect bounds = [self bounds];
bounds.size.width = 200;
bounds.size.height = 200;
bounds.origin.x += 200;
bounds.origin.y += 200;
//[NSGraphicsContext saveGraphicsState];
[[NSColor yellowColor] set]; // Just for testing purposes
NSRectFill(bounds);
//[NSGraphicsContext restoreGraphicsState];
}
}
Uncommenting the NSGrahicsContext doesn't help either.
Anyone has any ideas or workarounds for this?
Thanks in advance,
Florian
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may be unlawful.
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sender and permanently delete the original as well as any copy of any e-mail
and any printout thereof.
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