ScrollView.c File Reference

#include <assert.h>
#include "ScrollView.h"

Go to the source code of this file.

Macros
#define	_Class   _ScrollView

Functions
Class *	_ScrollView (void)
static _Bool	captureEvent (Control *self, const SDL_Event *event)
static void	dealloc (Object *self)
static void	initialize (Class *clazz)
static ScrollView *	initWithFrame (ScrollView *self, const SDL_Rect *frame)
static void	layoutSubviews (View *self)
static void	setContentView (ScrollView *self, View *contentView)

Macro Definition Documentation

_Class

#define _Class   _ScrollView

Definition at line 28 of file ScrollView.c.

Function Documentation

_ScrollView()

Class * _ScrollView

(

void

)

Definition at line 192 of file ScrollView.c.

                         {
    static Class *clazz;
    static Once once;
 
    do_once(&once, {
        clazz = _initialize(&(const ClassDef) {
            .name = "ScrollView",
            .superclass = _Control(),
            .instanceSize = sizeof(ScrollView),
            .interfaceOffset = offsetof(ScrollView, interface),
            .interfaceSize = sizeof(ScrollViewInterface),
            .initialize = initialize,
        });
    });
 
    return clazz;
}

captureEvent()

static _Bool captureEvent ( Control *  self, const SDL_Event *  event  )

static

See also

Control::captureEvent(Control *, const SDL_Event *)

Definition at line 68 of file ScrollView.c.

                                                                 {
 
    ScrollView *this = (ScrollView *) self;
 
    if (event->type == SDL_MOUSEMOTION && (event->motion.state & SDL_BUTTON_LMASK)) {
        self->state |= ControlStateHighlighted;
 
        SDL_Point offset = this->contentOffset;
 
        offset.x += event->motion.xrel;
        offset.y += event->motion.yrel;
 
        $(this, scrollToOffset, &offset);
        return true;
    } else if (event->type == SDL_MOUSEWHEEL) {
        SDL_Point offset = this->contentOffset;
 
        offset.x -= event->wheel.x * this->step;
        offset.y += event->wheel.y * this->step;
 
        $(this, scrollToOffset, &offset);
        return true;
    } else if (event->type == SDL_MOUSEBUTTONUP && (event->button.button & SDL_BUTTON_LMASK)) {
 
        if ($(self, isHighlighted)) {
            self->state &= ~ControlStateHighlighted;
            return true;
        }
    }
 
    return super(Control, self, captureEvent, event);
}

dealloc()

static void dealloc ( Object *  self )

static

See also

Object::dealloc(Object *)

Definition at line 35 of file ScrollView.c.

                                  {
 
    ScrollView *this = (ScrollView *) self;
 
    release(this->contentView);
 
    super(Object, self, dealloc);
}

initialize()

static void initialize ( Class *  clazz )

static

See also

Class::initialize(Class *)

Definition at line 175 of file ScrollView.c.

                                     {
 
    ((ObjectInterface *) clazz->interface)->dealloc = dealloc;
 
    ((ViewInterface *) clazz->interface)->layoutSubviews = layoutSubviews;
 
    ((ControlInterface *) clazz->interface)->captureEvent = captureEvent;
 
    ((ScrollViewInterface *) clazz->interface)->initWithFrame = initWithFrame;
    ((ScrollViewInterface *) clazz->interface)->scrollToOffset = scrollToOffset;
    ((ScrollViewInterface *) clazz->interface)->setContentView = setContentView;
}

initWithFrame()

static ScrollView * initWithFrame ( ScrollView *  self, const SDL_Rect *  frame  )

static

Definition at line 107 of file ScrollView.c.

                                                                          {
 
    self = (ScrollView *) super(Control, self, initWithFrame, frame);
    if (self) {
        self->step = DEFAULT_SCROLL_VIEW_STEP;
    }
 
    return self;
}

layoutSubviews()

static void layoutSubviews ( View *  self )

static

See also

View::layoutSubviews(View *)

Definition at line 49 of file ScrollView.c.

                                       {
 
    super(View, self, layoutSubviews);
 
    ScrollView *this = (ScrollView *) self;
 
    if (this->contentView) {
        this->contentView->frame.x = this->contentOffset.x;
        this->contentView->frame.y = this->contentOffset.y;
 
        $(this->contentView, sizeToContain);
    }
}

setContentView()

static void setContentView ( ScrollView *  self, View *  contentView  )

static

Definition at line 150 of file ScrollView.c.

                                                                {
 
    if (contentView != self->contentView) {
 
        if (self->contentView) {
            $(self->contentView, removeClassName, "contentView");
            $((View *) self, removeSubview, self->contentView);
            self->contentView = release(self->contentView);
        }
 
        if (contentView) {
            $(contentView, addClassName, "contentView");
            $((View *) self, addSubview, contentView);
            self->contentView = retain(contentView);
        }
 
        $(self, scrollToOffset, &MakePoint(0, 0));
    }
}