Checkbox.c

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/*
 * ObjectivelyMVC: Object oriented MVC framework for OpenGL, SDL2 and GNU C.
 * Copyright (C) 2014 Jay Dolan <jay@jaydolan.com>
 *
 * This software is provided 'as-is', without any express or implied
 * warranty. In no event will the authors be held liable for any damages
 * arising from the use of this software.
 *
 * Permission is granted to anyone to use this software for any purpose,
 * including commercial applications, and to alter it and redistribute it
 * freely, subject to the following restrictions:
 *
 * 1. The origin of this software must not be misrepresented; you must not
 * claim that you wrote the original software. If you use this software
 * in a product, an acknowledgment in the product documentation would be
 * appreciated but is not required.
 *
 * 2. Altered source versions must be plainly marked as such, and must not be
 * misrepresented as being the original software.
 *
 * 3. This notice may not be removed or altered from any source distribution.
 */
 
#include <assert.h>
 
#include "Checkbox.h"
 
#include "check.png.h"
 
#define _Class _Checkbox
 
static Image *_check;
 
#pragma mark - Object
 
static void dealloc(Object *self) {
 
    Checkbox *this = (Checkbox *) self;
 
    release(this->box);
    release(this->check);
 
    super(Object, self, dealloc);
}
 
#pragma mark - View
 
static void awakeWithDictionary(View *self, const Dictionary *dictionary) {
 
    super(View, self, awakeWithDictionary, dictionary);
 
    Checkbox *this = (Checkbox *) self;
 
    const Inlet inlets[] = MakeInlets(
        MakeInlet("check", InletTypeView, &this->check, NULL)
    );
 
    $(self, bind, inlets, dictionary);
}
 
static View *init(View *self) {
    return (View *) $((Checkbox *) self, initWithFrame, NULL);
}
 
#pragma mark - Control
 
static _Bool captureEvent(Control *self, const SDL_Event *event) {
 
    const View *box = (View *) ((Checkbox *) self)->box;
    
    if (event->type == SDL_MOUSEBUTTONDOWN) {
        if ($(box, didReceiveEvent, event)) {
            self->state |= ControlStateHighlighted;
            return true;
        }
    }
    if (event->type == SDL_MOUSEBUTTONUP) {
        if ($(box, didReceiveEvent, event)) {
            self->state ^= ControlStateSelected;
            self->state &= ~ControlStateHighlighted;
            return true;
        }
    }
 
    return super(Control, self, captureEvent, event);
}
 
static void stateDidChange(Control *self) {
 
    super(Control, self, stateDidChange);
 
    Checkbox *this = (Checkbox *) self;
 
    if (self->state & ControlStateSelected) {
        this->check->view.hidden = false;
    } else {
        this->check->view.hidden = true;
    }
}
 
#pragma mark - Checkbox
 
static Checkbox *initWithFrame(Checkbox *self, const SDL_Rect *frame) {
 
    self = (Checkbox *) super(Control, self, initWithFrame, frame);
    if (self) {
 
        self->control.view.autoresizingMask = ViewAutoresizingContain;
 
        self->box = $(alloc(Control), initWithFrame, frame);
        assert(self->box);
 
        self->box->view.alignment = ViewAlignmentMiddleCenter;
 
        self->check = $(alloc(ImageView), initWithImage, _check);
        assert(self->check);
 
        self->check->view.autoresizingMask = ViewAutoresizingFill;
        self->check->view.hidden = true;
 
        $((View *) self->box, addSubview, (View *) self->check);
        $((View *) self, addSubview, (View *) self->box);
    }
 
    return self;
}
 
#pragma mark - Class lifecycle
 
static void initialize(Class *clazz) {
 
    ((ObjectInterface *) clazz->interface)->dealloc = dealloc;
 
    ((ViewInterface *) clazz->interface)->awakeWithDictionary = awakeWithDictionary;
    ((ViewInterface *) clazz->interface)->init = init;
 
    ((ControlInterface *) clazz->interface)->captureEvent = captureEvent;
    ((ControlInterface *) clazz->interface)->stateDidChange = stateDidChange;
 
    ((CheckboxInterface *) clazz->interface)->initWithFrame = initWithFrame;
 
    _check = $(alloc(Image), initWithBytes, check_png, check_png_len);
}
 
static void destroy(Class *clazz) {
    release(_check);
}
 
Class *_Checkbox(void) {
    static Class *clazz;
    static Once once;
 
    do_once(&once, {
        clazz = _initialize(&(const ClassDef) {
            .name = "Checkbox",
            .superclass = _Control(),
            .instanceSize = sizeof(Checkbox),
            .interfaceOffset = offsetof(Checkbox, interface),
            .interfaceSize = sizeof(CheckboxInterface),
            .initialize = initialize,
            .destroy = destroy,
        });
    });
 
    return clazz;
}
 
#undef _Class