[cairo] [cairo osx] OS X example

[Ipacs Péter]

Hi Hugo,

This is what I wanted. A cocoa app including a custom view powered by cairo.
I'm gonna try it very soon:)

Thank you very much!

Cheers,
P

On 6/21/07, Hugo Vincent <hugo.vincent at gmail.com> wrote:
>
> Here is a simple example I put together when I went through this
> exact painful process a couple of months back. I haven't tested it
> for a while, but it seems to still run and might be of use still.
> Also, this uses Cairomm, but you should be able to figure it out the
> minor changes in API to change it from Cairomm to plain Cairo.
>
> Cheers,
> Hugo Vincent.
>
> -----------------------------------------------------------
> testview.h:
> -----------------------------------------------------------
>
> #import <Cocoa/Cocoa.h>
>
> // Put one of these views into your layout in Interface Builder.
> @interface TestView : NSView
> {
>         // nothing needed here
> }
> @end
>
> -----------------------------------------------------------
> testview.m
> -----------------------------------------------------------
>
> #include <cairomm/cairomm.h>
> #include <cairomm/quartz_surface.h>
>
> #ifndef CAIRO_HAS_QUARTZ_SURFACE
> #error Need to build Cairo with Quartz support (version 1.4.0 or higher)
> #endif
>
> @implementation TestView
>
> - (id)initWithFrame:(NSRect)frameRect
> {
>         if ((self = [super initWithFrame:frameRect]) != nil)
>         {
>                 // nothing needed here
>         }
>         return self;
> }
>
> - (BOOL)isOpaque
> {
>         return NO;
> }
>
> - (void)drawRect:(NSRect)rect
> {
>         // Get the size of this NSView
>         NSRect bounds = [self bounds];
>         int width = bounds.size.width;
>         int height = bounds.size.height;
>
>         // Get CoreGraphcis context reference
>         CGContextRef ctx = (CGContextRef)[[NSGraphicsContext
> currentContext]
> graphicsPort];
>
>         // Make the CGContext coordinate system sane, as expected by Cairo
>         CGContextTranslateCTM (ctx, 0.0, height);
>         CGContextScaleCTM (ctx, 1.0, -1.0);
>
>         // Create the Cairo surface and context
>         Cairo::RefPtr<Cairo::QuartzSurface> surface =
> Cairo::QuartzSurface::create(ctx, width, height);
>         Cairo::RefPtr<Cairo::Context> cr =
> Cairo::Context::create(surface);
>
>         // Cairo-Quartz fallback surfaces don't work properly, so we need
> to
> create a temp. surface like this:
>         cr->push_group();
>
>         //---------- Drawing stuff (put your code in here)
> -------------------------------
>         // Draw a radial gradient (copied and pasted, more or less, from
> http://cairographics.org/samples/gradient.html)
>         cr->scale(width,height);
>         Cairo::RefPtr<Cairo::RadialGradient> grad2 =
> Cairo::RadialGradient::create(0.45, 0.4, 0.1, 0.4, 0.4, 0.5);
>         grad2->add_color_stop_rgba(0, 1,0,0, 1);
>         grad2->add_color_stop_rgba(1, 0,1,0, 1);
>         cr->set_source(grad2);
>         cairo_arc (cr, 0.5, 0.5, 0.3, 0, 2 * M_PI);
>         cr->fill();
>
>         //---------------------------------------------------------------------
> -----------
>
>         // Finally, paint the temporary surface we made
>         cr->pop_group_to_source();
>         cr->paint();
> }
>
> @end
>
>
> On 21/06/2007, at 7:00 AM, cairo-request at cairographics.org wrote:
> > Message: 1
> > Date: Wed, 20 Jun 2007 15:52:51 +0200
> > From: " Ipacs P?ter " <peter at ipacs.hu>
> > Subject: [cairo] [cairo osx] OS X example
> > To: cairo at cairographics.org
> > Message-ID:
> >       <6a86db250706200652m24dd6b9di17a881912402da62 at mail.gmail.com>
> > Content-Type: text/plain; charset="utf-8"
> >
> > Hi there,
> >
> > I'm quite new to cairo so please excuse me if I ask obvious
> > questions:)
> >
> > I'm trying to build the quartz example from the CVS (
> > http://webcvs.cairographics.org/cairo-demo/quartz/) but it fails.
> > This is what I get:
> > cc -g -Wall -Wstrict-prototypes -Wmissing-prototypes -Wmissing-
> > declarations
> > -Wredundant-decls `pkg-config --cflags cairo`   -c -o main.o main.c
> > main.c: In function 'TestWindowEventHandler':
> > main.c:65: error: incompatible type for argument 1 of
> > 'cairo_quartz_surface_create'
> > main.c: In function 'RedrawTimerCallback':
> > main.c:188: warning: 'SetRect' is deprecated (declared at
> > /System/Library/Frameworks/ApplicationServices.framework/Frameworks/
> > QD.framework/Headers/Quickdraw.h:2401)
> > main.c: In function 'CreateTestWindow':
> > main.c:205: warning: 'SetRect' is deprecated (declared at
> > /System/Library/Frameworks/ApplicationServices.framework/Frameworks/
> > QD.framework/Headers/Quickdraw.h:2401)
> > make: *** [main.o] Error 1
> >
> > What do you think about it?
> >
> > Another question:
> > Are there any OS X examples around that can be used out-of-the-box?
> > I mean
> > examples that does not require hundreds of dependencies and can be
> > compiled
> > by a simple 'make' or something.
> >
> > Cheers,
> > Peter
>
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> cairo at cairographics.org
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>



-- 
Peter Ipacs
Senior Business Analyst
E-mail: peter at ipacs.hu
Phone: (+36)20/483-4229
MSN: peter at ipacs.hu
ICQ: 131065782
Skype: peteripacs
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