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#include "image_view.h"
#include "math/binary.h"
#include "sdlx/rect.h"
#include "sdlx/surface.h"
#include "box.h"
ImageView::ImageView(int w, int h) :
_w(w), _h(h), _image(NULL), _overlay(NULL),
_box(new Box("menu/background_box.png", _w, _h)) {
add(0, 0, _box);
}
void ImageView::setOverlay(const sdlx::Surface *overlay, const v2<int> &dpos) {
_overlay = overlay;
_overlay_dpos = dpos;
}
void ImageView::init(const sdlx::Surface *image) {
_image = image;
}
void ImageView::render(sdlx::Surface &surface, const int x, const int y) const {
Container::render(surface, x, y);
if (_image == NULL)
return;
int mx, my;
_box->getMargins(mx, my);
sdlx::Rect clip;
surface.get_clip_rect(clip);
surface.set_clip_rect(sdlx::Rect(mx + x, my + y, _w - 2 * mx, _h - 2 * my));
surface.blit(*_image, x + mx - (int)position.x, y + my - (int)position.y);
if (_overlay != NULL)
surface.blit(*_overlay, x + mx - (int)position.x + _overlay_dpos.x, y + my - (int)position.y + _overlay_dpos.y);
surface.set_clip_rect(clip);
}
void ImageView::validate(v2<float> & pos) {
if (_image == NULL)
return;
if (pos.x < 0)
pos.x = 0;
if (pos.y < 0)
pos.y = 0;
int mx, my;
_box->getMargins(mx, my);
int w = _w - 2 * mx, h = _h - 2 * my;
if (pos.x + w > _image->get_width())
pos.x = _image->get_width() - w;
if (pos.y + h > _image->get_height())
pos.y = _image->get_height() - h;
}
void ImageView::tick(const float dt) {
Container::tick(dt);
validate(destination);
validate(position);
v2<float> map_vel = destination - position;
if (map_vel.quick_length() < 1) {
position = destination;
} else {
map_vel.normalize();
float dist = destination.distance(position);
position += math::min(dist, map_vel.length() * (dist > 300?600:(dist < 25?50:dist * 2)) * dt) * map_vel;
}
}
void ImageView::set_position(const v2<float> &pos) {
setDestination(pos);
position = destination;
}
void ImageView::setDestination(const v2<float> &pos) {
v2<float> p = pos - v2<float>(_w, _h) / 2;
if (_overlay)
p += v2<float>(_overlay->get_width(), _overlay->get_height()) / 2;
destination = p;
}
bool ImageView::onMouseMotion(const int state, const int x, const int y, const int xrel, const int yrel) {
if ((state & SDL_BUTTON(1)) == 0)
return false;
position.x -= xrel;
position.y -= yrel;
validate(position);
destination = position;
return true;
}
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