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123 lines
3.8 KiB
Objective-C
123 lines
3.8 KiB
Objective-C
//
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// CSOpenGLView.h
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// Clock Signal
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//
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// Created by Thomas Harte on 16/07/2015.
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// Copyright 2015 Thomas Harte. All rights reserved.
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//
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#import <Foundation/Foundation.h>
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#import <AppKit/AppKit.h>
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@class CSOpenGLView;
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typedef NS_ENUM(NSInteger, CSOpenGLViewRedrawEvent) {
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/// Indicates that AppKit requested a redraw for some reason (mostly likely, the window is being resized). So,
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/// if the delegate doesn't redraw the view, the user is likely to see a graphical flaw.
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CSOpenGLViewRedrawEventAppKit,
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/// Indicates that the view's display-linked timer has triggered a redraw request. So, if the delegate doesn't
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/// redraw the view, the user will just see the previous drawing without interruption.
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CSOpenGLViewRedrawEventTimer
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};
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@protocol CSOpenGLViewDelegate
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/*!
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Requests that the delegate produce an image of its current output state. May be called on
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any queue or thread.
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@param view The view making the request.
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@param redrawEvent If @c YES then the delegate may decline to redraw if its output would be
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identical to the previous frame. If @c NO then the delegate must draw.
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*/
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- (void)openGLViewRedraw:(nonnull CSOpenGLView *)view event:(CSOpenGLViewRedrawEvent)redrawEvent;
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/*!
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Announces receipt of a file by drag and drop to the delegate.
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@param view The view making the request.
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@param URL The file URL of the received file.
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*/
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- (void)openGLView:(nonnull CSOpenGLView *)view didReceiveFileAtURL:(nonnull NSURL *)URL;
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@end
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@protocol CSOpenGLViewResponderDelegate <NSObject>
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/*!
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Supplies a keyDown event to the delegate.
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@param event The @c NSEvent describing the keyDown.
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*/
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- (void)keyDown:(nonnull NSEvent *)event;
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/*!
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Supplies a keyUp event to the delegate.
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@param event The @c NSEvent describing the keyUp.
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*/
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- (void)keyUp:(nonnull NSEvent *)event;
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/*!
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Supplies a flagsChanged event to the delegate.
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@param event The @c NSEvent describing the flagsChanged.
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*/
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- (void)flagsChanged:(nonnull NSEvent *)event;
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/*!
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Supplies a paste event to the delegate.
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*/
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- (void)paste:(nonnull id)sender;
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@optional
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/*!
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Supplies a mouse moved event to the delegate. This functions only if
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shouldCaptureMouse is set to YES, in which case the view will ensure it captures
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the mouse and returns only relative motion
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(Cf. CGAssociateMouseAndMouseCursorPosition). It will also elide mouseDragged:
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(and rightMouseDragged:, etc) and mouseMoved: events.
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*/
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- (void)mouseMoved:(nonnull NSEvent *)event;
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/*!
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Supplies a mouse button down event. This elides mouseDown, rightMouseDown and otherMouseDown.
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@c shouldCaptureMouse must be set to @c YES to receive these events.
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*/
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- (void)mouseDown:(nonnull NSEvent *)event;
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/*!
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Supplies a mouse button up event. This elides mouseUp, rightMouseUp and otherMouseUp.
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@c shouldCaptureMouse must be set to @c YES to receive these events.
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*/
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- (void)mouseUp:(nonnull NSEvent *)event;
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@end
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/*!
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Provides an OpenGL canvas with a refresh-linked update timer that can forward a subset
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of typical first-responder actions.
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*/
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@interface CSOpenGLView : NSOpenGLView
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@property (atomic, weak, nullable) id <CSOpenGLViewDelegate> delegate;
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@property (nonatomic, weak, nullable) id <CSOpenGLViewResponderDelegate> responderDelegate;
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@property (nonatomic, assign) BOOL shouldCaptureMouse;
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/*!
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Ends the timer tracking time; should be called prior to giving up the last owning reference
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to ensure that any retain cycles implied by the timer are resolved.
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*/
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- (void)invalidate;
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/// The size in pixels of the OpenGL canvas, factoring in screen pixel density and view size in points.
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@property (nonatomic, readonly) CGSize backingSize;
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/*!
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Locks this view's OpenGL context and makes it current, performs @c action and then unlocks
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the context. @c action is performed on the calling queue.
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*/
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- (void)performWithGLContext:(nonnull dispatch_block_t)action;
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/*!
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Instructs that the mouse cursor, if currently captured, should be released.
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*/
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- (void)releaseMouse;
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@end
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