Select.c

Go to the documentation of this file.

/*
 * 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 <Objectively/Array.h>
 
#include "Select.h"
 
#define _Class _Select
 
#pragma mark - Object
 
static void dealloc(Object *self) {
 
    Select *this = (Select *) self;
 
    release(this->options);
    release(this->stackView);
 
    super(Object, self, dealloc);
}
 
#pragma mark - View
 
static View *init(View *self) {
    return (View *) $((Select *) self, initWithFrame, NULL);
}
 
static void layoutSubviews(View *self) {
 
    Select *this = (Select *) self;
 
    Control *control = (Control *) self;
 
    if (control->selection == ControlSelectionSingle) {
 
        const Array *options = (Array *) this->options;
        for (size_t i = 0; i < options->count; i++) {
 
            Option *option = $(options, objectAtIndex, i);
            if (option->isSelected) {
                option->view.hidden = false;
            } else if ($(control, isHighlighted)) {
                option->view.hidden = false;
            } else {
                option->view.hidden = true;
            }
        }
 
        $((View *) this->stackView, sizeToFit);
    }
 
    super(View, self, layoutSubviews);
}
 
static SDL_Size sizeThatFits(const View *self) {
 
    const Select *this = (Select *) self;
 
    SDL_Size size = super(View, self, sizeThatFits);
 
    const Array *options = (Array *) this->options;
    for (size_t i = 0; i < options->count; i++) {
 
        const View *option = $(options, objectAtIndex, i);
        const SDL_Size optionSize = $(option, sizeThatFits);
 
        size.w = max(size.w, optionSize.w + self->padding.left + self->padding.right);
        size.h = max(size.h, optionSize.h + self->padding.top + self->padding.bottom);
    }
 
    return size;
}
 
#pragma mark - Control
 
static _Bool captureEvent(Control *self, const SDL_Event *event) {
 
    Select *this = (Select *) self;
 
    if (event->type == SDL_MOUSEBUTTONUP) {
        if (self->state == ControlStateHighlighted) {
            self->state &= ~ControlStateHighlighted;
 
            const Array *options = (Array *) this->options;
            for (size_t i = 0; i < options->count; i++) {
 
                Option *option = $(options, objectAtIndex, i);
                if ($((View *) option, didReceiveEvent, event)) {
                    $(this, selectOption, option);
                    if (this->delegate.didSelectOption) {
                        this->delegate.didSelectOption(this, option);
                    }
                    return true;
                }
            }
        } else if ($((View *) self, didReceiveEvent, event)) {
            self->state |= ControlStateHighlighted;
            return true;
        }
    }
 
    return super(Control, self, captureEvent, event);
}
 
static void stateDidChange(Control *self) {
 
    Select *this = (Select *) self;
 
    if (self->selection == ControlSelectionSingle) {
 
        View *stackView = (View *) this->stackView;
 
        if ($(self, isHighlighted)) {
 
            const SDL_Rect renderFrame = $((View *) self, renderFrame);
 
            stackView->frame.x = renderFrame.x + self->view.padding.left;
            stackView->frame.y = renderFrame.y + self->view.padding.top;
 
            View *view = (View *) self;
 
            while (view->superview) {
                view = view->superview;
            }
 
            $(stackView, addClassName, "options");
            $(view, addSubview, stackView);
 
            stackView->nextResponder = (View *) self;
 
        } else {
 
            $(stackView, removeClassName, "options");
            $((View *) self, addSubview, stackView);
 
            stackView->nextResponder = NULL;
        }
 
        $(stackView, sizeToFit);
    }
 
    super(Control, self, stateDidChange);
}
 
#pragma mark - Select
 
static void addOption_removeSubview(const Array *array, ident obj, ident data) {
    $((View *) data, removeSubview, obj);
}
 
static void addOption_addSubview(const Array *array, ident obj, ident data) {
    $((View *) data, addSubview, obj);
}
 
static void addOption(Select *self, const char *title, ident value) {
 
    Option *option = $(alloc(Option), initWithTitle, title, value);
    assert(option);
 
    $(self->options, addObject, option);
 
    $((Array *) self->options, enumerateObjects, addOption_removeSubview, self->stackView);
 
    if (self->comparator) {
        $(self->options, sort, self->comparator);
    }
 
    $((Array *) self->options, enumerateObjects, addOption_addSubview, self->stackView);
 
    if (self->control.selection == ControlSelectionSingle) {
        if ($(self, selectedOption) == NULL) {
            $(option, setSelected, true);
        }
    }
 
    release(option);
 
    self->control.view.needsLayout = true;
}
 
static Select *initWithFrame(Select *self, const SDL_Rect *frame) {
 
    self = (Select *) super(Control, self, initWithFrame, frame);
    if (self) {
 
        self->control.selection = ControlSelectionSingle;
 
        self->options = $$(MutableArray, arrayWithCapacity, 8);
        assert(self->options);
 
        self->stackView = $(alloc(StackView), initWithFrame, NULL);
        assert(self->stackView);
 
        $((View *) self, addSubview, (View *) self->stackView);
    }
 
    return self;
}
 
static _Bool optionWithValue_predicate(ident obj, ident data) {
    return ((Option *) obj)->value == data;
}
 
static Option *optionWithValue(const Select *self, const ident value) {
    return $((Array *) self->options, findObject, optionWithValue_predicate, value);
}
 
static void removeAllOptions_enumerate(const Array *array, ident obj, ident data) {
    $((Select *) data, removeOption, obj);
}
 
static void removeAllOptions(Select *self) {
    $((Array *) self->options, enumerateObjects, removeAllOptions_enumerate, self);
}
 
static void removeOption(Select *self, Option *option) {
 
    if ($((Array *) self->options, containsObject, option)) {
 
        $(self->options, removeObject, option);
        $((View *) self->stackView, removeSubview, (View *) option);
 
        if (self->control.selection == ControlSelectionSingle) {
            if ($(self, selectedOption) == NULL) {
                Option *first_option = $((Array *) self->options, firstObject);
                if (first_option) {
                    $(self, selectOption, first_option);
                }
            }
        }
 
        self->control.view.needsLayout = true;
    }
}
 
static void removeOptionWithValue(Select *self, ident value) {
 
    Option *option = (Option *) $(self, optionWithValue, value);
    if (option) {
        $(self, removeOption, option);
    }
}
 
static void selectOption_enumerate(const Array *array, ident obj, ident data) {
    $((Option *) obj, setSelected, false);
}
 
static void selectOption(Select *self, Option *option) {
 
    if (self->control.selection == ControlSelectionSingle) {
        $((Array *) self->options, enumerateObjects, selectOption_enumerate, NULL);
    }
 
    if (option) {
 
        if (option && option->isSelected == false) {
            $(option, setSelected, true);
        }
    }
 
    self->control.view.needsLayout = true;
}
 
static void selectOptionWithValue(Select *self, ident value) {
 
    Option *option = $(self, optionWithValue, value);
 
    $(self, selectOption, option);
}
 
static _Bool selectedOptions_predicate(ident obj, ident data) {
    return ((Option *) obj)->isSelected;
}
 
static Option *selectedOption(const Select *self) {
    return $((Array *) self->options, findObject, selectedOptions_predicate, NULL);
}
 
static Array *selectedOptions(const Select *self) {
    return $((Array *) self->options, filteredArray, selectedOptions_predicate, NULL);
}
 
#pragma mark - Class lifecycle
 
static void initialize(Class *clazz) {
 
    ((ObjectInterface *) clazz->interface)->dealloc = dealloc;
 
    ((ViewInterface *) clazz->interface)->init = init;
    ((ViewInterface *) clazz->interface)->layoutSubviews = layoutSubviews;
    ((ViewInterface *) clazz->interface)->sizeThatFits = sizeThatFits;
 
    ((ControlInterface *) clazz->interface)->captureEvent = captureEvent;
    ((ControlInterface *) clazz->interface)->stateDidChange = stateDidChange;
 
    ((SelectInterface *) clazz->interface)->addOption = addOption;
    ((SelectInterface *) clazz->interface)->initWithFrame = initWithFrame;
    ((SelectInterface *) clazz->interface)->optionWithValue = optionWithValue;
    ((SelectInterface *) clazz->interface)->removeAllOptions = removeAllOptions;
    ((SelectInterface *) clazz->interface)->removeOption = removeOption;
    ((SelectInterface *) clazz->interface)->removeOptionWithValue = removeOptionWithValue;
    ((SelectInterface *) clazz->interface)->selectOption = selectOption;
    ((SelectInterface *) clazz->interface)->selectOptionWithValue = selectOptionWithValue;
    ((SelectInterface *) clazz->interface)->selectedOption = selectedOption;
    ((SelectInterface *) clazz->interface)->selectedOptions = selectedOptions;
}
 
Class *_Select(void) {
    static Class *clazz;
    static Once once;
 
    do_once(&once, {
        clazz = _initialize(&(const ClassDef) {
            .name = "Select",
            .superclass = _Control(),
            .instanceSize = sizeof(Select),
            .interfaceOffset = offsetof(Select, interface),
            .interfaceSize = sizeof(SelectInterface),
            .initialize = initialize,
        });
    });
 
    return clazz;
}
 
#undef _Class