HSVColorPicker.c

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/*
 * ObjectivelyMVC: Object oriented MVC framework for SDL3 and 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 "HSVColorPicker.h"
 
#define _Class _HSVColorPicker
 
#pragma mark - Delegates
 
static void didSetComponent(Slider *slider, double value) {
 
  HSVColorPicker *this = (HSVColorPicker *) slider->delegate.self;
 
  if (slider == this->hueSlider) {
    this->hue = value;
  } else if (slider == this->saturationSlider) {
    this->saturation = value;
  } else if (slider == this->valueSlider) {
    this->value = value;
  } else {
    assert(false);
  }
 
  $((View *) this, updateBindings, NULL);
 
  if (this->delegate.didPickColor) {
    this->delegate.didPickColor(this, this->hue, this->saturation, this->value);
  }
}
 
#pragma mark - Object
 
static void dealloc(Object *self) {
 
  HSVColorPicker *this = (HSVColorPicker *) self;
 
  memset(&this->delegate, 0, sizeof(this->delegate));
 
  release(this->colorView);
  release(this->hueSlider);
  release(this->hueInput);
  release(this->saturationSlider);
  release(this->saturationInput);
  release(this->valueSlider);
  release(this->valueInput);
  release(this->stackView);
 
  super(Object, self, dealloc);
}
 
#pragma mark - View
 
static void awakeWithDictionary(View *self, const Dictionary *dictionary) {
 
  super(View, self, awakeWithDictionary, dictionary);
 
  HSVColorPicker *this = (HSVColorPicker *) self;
 
  const Inlet inlets[] = MakeInlets(
    MakeInlet("colorView", InletTypeView, &this->colorView, NULL),
    MakeInlet("hue", InletTypeDouble, &this->hue, NULL),
    MakeInlet("saturation", InletTypeDouble, &this->saturation, NULL),
    MakeInlet("value", InletTypeDouble, &this->value, NULL),
    MakeInlet("hueSlider", InletTypeView, &this->hueSlider, NULL),
    MakeInlet("hueInput", InletTypeView, &this->hueInput, NULL),
    MakeInlet("saturationSlider", InletTypeView, &this->saturationSlider, NULL),
    MakeInlet("saturationInput", InletTypeView, &this->saturationInput, NULL),
    MakeInlet("valueSlider", InletTypeView, &this->valueSlider, NULL),
    MakeInlet("valueInput", InletTypeView, &this->valueInput, NULL),
    MakeInlet("stackView", InletTypeView, &this->stackView, NULL)
  );
 
  $(self, bind, inlets, dictionary);
}
 
static View *init(View *self) {
  return (View *) $((HSVColorPicker *) self, initWithFrame, NULL);
}
 
static void updateBindings(View *self, ident data) {
 
  super(View, self, updateBindings, data);
 
  HSVColorPicker *this = (HSVColorPicker *) self;
 
  $(this->hueSlider, setValue, this->hue);
  $(this->saturationSlider, setValue, this->saturation);
  $(this->valueSlider, setValue, this->value);
 
  const SDL_Color color = $(this, rgbColor);
  $(this->colorView->style, addColorAttribute, "background-color", &color);
  $(this->colorView, invalidateStyle);
}
 
#pragma mark - HSVColorPicker
 
static HSVColorPicker *initWithFrame(HSVColorPicker *self, const SDL_Rect *frame) {
 
  self = (HSVColorPicker *) super(Control, self, initWithFrame, frame);
  if (self) {
 
    self->stackView = $(alloc(StackView), initWithFrame, NULL);
    assert(self->stackView);
 
    $((View *) self, addSubview, (View *) self->stackView);
 
    self->colorView = $(alloc(View), initWithFrame, &MakeRect(0, 0, 0, 24));
    assert(self->colorView);
 
    $(self->colorView, addClassName, "colorView");
    $((View *) self->stackView, addSubview, self->colorView);
 
    self->hueSlider = $(alloc(Slider), initWithFrame, NULL);
    assert(self->hueSlider);
 
    self->hueSlider->delegate.self = self;
    self->hueSlider->delegate.didSetValue = didSetComponent;
    self->hueSlider->max = 360.0;
    $(self->hueSlider, setLabelFormat, "%.0lf");
 
    self->hueInput = $(alloc(Input), initWithFrame, NULL);
    assert(self->hueInput);
 
    $(self->hueInput, setControl, (Control *) self->hueSlider);
    $(self->hueInput->label->text, setText, "H");
 
    $((View *) self->stackView, addSubview, (View *) self->hueInput);
 
    self->saturationSlider = $(alloc(Slider), initWithFrame, NULL);
    assert(self->saturationSlider);
 
    self->saturationSlider->delegate.self = self;
    self->saturationSlider->delegate.didSetValue = didSetComponent;
    self->saturationSlider->max = 1.0;
    $(self->saturationSlider, setLabelFormat, "%.3f");
 
    self->saturationInput = $(alloc(Input), initWithFrame, NULL);
    assert(self->saturationInput);
 
    $(self->saturationInput, setControl, (Control *) self->saturationSlider);
    $(self->saturationInput->label->text, setText, "S");
 
    $((View *) self->stackView, addSubview, (View *) self->saturationInput);
 
    self->valueSlider = $(alloc(Slider), initWithFrame, NULL);
    assert(self->valueSlider);
 
    self->valueSlider->delegate.self = self;
    self->valueSlider->delegate.didSetValue = didSetComponent;
    self->valueSlider->max = 1.0;
    $(self->valueSlider, setLabelFormat, "%.3f");
 
    self->valueInput = $(alloc(Input), initWithFrame, NULL);
    assert(self->valueInput);
 
    $(self->valueInput, setControl, (Control *) self->valueSlider);
    $(self->valueInput->label->text, setText, "V");
 
    $((View *) self->stackView, addSubview, (View *) self->valueInput);
 
    $(self, setColor, 0.0, 1.0, 1.0);
  }
 
  return self;
}
 
static SDL_Color rgbColor(const HSVColorPicker *self) {
  return MVC_HSVToRGB(self->hue, self->saturation, self->value);
}
 
static void setColor(HSVColorPicker *self, double hue, double saturation, double value) {
 
  self->hue = hue;
  self->saturation = saturation;
  self->value = value;
 
  $((View *) self, updateBindings, NULL);
}
 
static void setRGBColor(HSVColorPicker *self, const SDL_Color *color) {
 
  MVC_RGBToHSV(color, &self->hue, &self->saturation, &self->value);
 
  $((View *) self, updateBindings, NULL);
}
 
#pragma mark - Class lifecycle
 
static void initialize(Class *clazz) {
 
  ((ObjectInterface *) clazz->interface)->dealloc = dealloc;
 
  ((ViewInterface *) clazz->interface)->awakeWithDictionary = awakeWithDictionary;
  ((ViewInterface *) clazz->interface)->init = init;
  ((ViewInterface *) clazz->interface)->updateBindings = updateBindings;
 
  ((HSVColorPickerInterface *) clazz->interface)->initWithFrame = initWithFrame;
  ((HSVColorPickerInterface *) clazz->interface)->rgbColor = rgbColor;
  ((HSVColorPickerInterface *) clazz->interface)->setColor = setColor;
  ((HSVColorPickerInterface *) clazz->interface)->setRGBColor = setRGBColor;
}
 
Class *_HSVColorPicker(void) {
  static Class *clazz;
  static Once once;
 
  do_once(&once, {
    clazz = _initialize(&(const ClassDef) {
      .name = "HSVColorPicker",
      .superclass = _Control(),
      .instanceSize = sizeof(HSVColorPicker),
      .interfaceSize = sizeof(HSVColorPickerInterface),
      .initialize = initialize,
    });
  });
 
  return clazz;
}
 
#undef _Class