C++ rect类代码示例

void
RiscosGui::setInvalidatedRegion(const rect& bounds)
{
    // Note: Bounds coordinates are in TWIPS

#ifdef RENDERER_AGG
    // forward to renderer
    _renderer->set_invalidated_region(bounds);

    if (bounds.width() > 1e10f) {
        // Region is entire screen. Don't convert to integer as this will
        // overflow.

        m_draw_minx = 0;
        m_draw_miny = 0;
        m_draw_maxx = _width - 1;
        m_draw_maxy = _height - 1;
    } else {
        // remember for renderBuffer()
        _renderer->world_to_pixel(&m_draw_minx, &m_draw_miny,
                                  bounds.get_x_min(), bounds.get_y_min());
        _renderer->world_to_pixel(&m_draw_maxx, &m_draw_maxy,
                                  bounds.get_x_max(), bounds.get_y_max());

        // add two pixels because of anti-aliasing...
        m_draw_minx = valid_coord(m_draw_minx - 2, _width);
        m_draw_miny = valid_coord(m_draw_miny - 2, _height);
        m_draw_maxx = valid_coord(m_draw_maxx + 2, _width);
        m_draw_maxy = valid_coord(m_draw_maxy + 2, _height);
    }

//    log_debug("DrawRect: (%i, %i), (%i, %i)\n",
//            m_draw_minx, m_draw_miny, m_draw_maxx, m_draw_maxy);
#endif
}

code_editor_dialog::code_editor_dialog(const rect& r)
  : dialog(r.x(), r.y(), r.w(), r.h()), invalidated_(0), has_error_(false),
    modified_(false), file_contents_set_(true), suggestions_prefix_(-1),
	have_close_buttons_(false)
{
	init();
}

    bool slider(int id, const rect & r, double min, double max, double step, double & value, bool disable_dragger = false)
    {
        bool changed = false;
        const int w = r.x1 - r.x0, h = r.y1 - r.y0;
        double p = (w - h) * (value - min) / (max - min);
        if (mouse_down && clicked_id == id)
        {
            p = std::max(0.0, std::min<double>(cursor.x - clicked_offset.x - r.x0, w - h));
            double new_value = min + p * (max - min) / (w - h);
            if (step) new_value = std::round((new_value - min) / step) * step + min;
            changed = new_value != value;
            value = new_value;
            p = (w - h) * (value - min) / (max - min);
        }
        const rect dragger = { int(r.x0 + p), int(r.y0), int(r.x0 + p + h), int(r.y1) };
        if (click && dragger.contains(cursor) && !disable_dragger)
        {
            clicked_offset = { cursor.x - dragger.x0, cursor.y - dragger.y0 };
            clicked_id = id;
        }
        fill_rect(r, { 0.5, 0.5, 0.5 });

        if (!disable_dragger)
            fill_rect(dragger, { 1, 1, 1 });

        return changed;
    }

	void CDX9Renderer::Box(const rect& r, const color& c)
	{
		// No support for textured lines
		SetTexture(NULL);

		BeginBatch(batch_linestrip);
		CBatch_Draw* draw_op = reinterpret_cast<CBatch_Draw*>(batch.back());

		D3DCOLOR color = c.getD3DCOLOR();

		// 4 vertices and use 5th index to repeat first vertex closing the strip as a box
		AddVertex(color, r.topleft(), 0.0f, 0.0f);
		AddVertex(color, r.topright(), 0.0f, 0.0f);
		AddVertex(color, r.bottomright(), 0.0f, 0.0f);
		AddVertex(color, r.bottomleft(), 0.0f, 0.0f);

		unsigned short index = draw_op->vertex_count;
		AddIndex(index);
		AddIndex(index + 1);
		AddIndex(index + 2);
		AddIndex(index + 3);
		AddIndex(index);

		draw_op->vertex_count += 4;
		draw_op->index_count += 5;
	}

message_dialog::message_dialog(const std::string& text, const rect& pos,
                               const std::vector<std::string>* options)
  : text_(text), pos_(pos), line_height_(0),
    cur_row_(0), cur_char_(0), cur_wait_(0),
	selected_option_(0)
{
	line_height_ = font::char_height(FontSize);
	viewable_lines_ = pos.h()/line_height_;
	if(viewable_lines_ < 1) {
		viewable_lines_ = 1;
	}

	const int max_chars_on_line = std::max<int>(1, pos.w()/font::char_width(FontSize));
	std::string::const_iterator i1 = text.begin();
	std::string::const_iterator i2 = i1;
	while(i2 != text.end()) {
		i2 = get_line(i2, text.end(), max_chars_on_line);
		if(i2 == i1) {
			break;
		}

		while(i1 != i2 && util::isspace(*i1)) {
			++i1;
		}

		lines_.push_back(font::render_text(std::string(i1, i2), graphics::color_black(), FontSize));
		i1 = i2;
	}

	if(options != NULL) {
		foreach(const std::string& option, *options) {
			options_.push_back(font::render_text(option, graphics::color_black(), FontSize));
		}
	}

void OpenGL3RenderState::set_viewport(OpenGL3ContextState& state, const rect<int>& viewport) const
{
    if (state.viewport == viewport)
        return;
    glViewport(viewport.ll().x(), viewport.ll().y(), viewport.width(), viewport.height());
    state.viewport = viewport;
}

int eval_overlap(rect r1, rect r2, branching_rule rule){
    int dist_x = std::min(r1.xmax-r2.xmin, r2.xmax-r1.xmin);
    int dist_y = std::min(r1.ymax-r2.ymin, r2.ymax-r1.ymin);
    assert(dist_x > 0 and dist_y > 0);
    int height = r1.get_height() + r2.get_height();
    int width  = r1.get_width()  + r2.get_width();
    switch(rule){
      case AREA:
        return rect::intersection(r1, r2).get_area();
      case LMIN:
        return std::min(dist_x, dist_y);
      case LMAX:
        return std::max(dist_x, dist_y);
      case LAVG:
        return dist_x+dist_y;
      case WMIN:
        return std::min(height, width);
      case WMAX:
        return std::max(height, width);
      case WAVG:
        return height + width;
      default:
        abort();
    }
}

void ExtObject::Draw()
{
	const point hotspot(info.HotSpotX, info.HotSpotY);
	const rect r  = cr::rect_xywh(info.x, info.y, info.w, info.h);
	const rect r2 = cr::rect_xywh(info.x + 0.5f, info.y + 0.5f, info.w - 1.0f, info.h - 1.0f);	

	const cr::color& c = info.pInfo->filter;

	quad q ((r2 - hotspot).rotate_to_quad(cr::to_radians(info.angle), r2.topleft()));

	if (!transparent)
		renderer->Fill(r, cr_colors.fill * c, info.angle, hotspot);

	// Draw
	if (smoothLines) {
		renderer->SmoothLine(q.tr, q.tl, cr_colors.c1 * c, 1.0);
		renderer->SmoothLine(q.tl, q.bl, cr_colors.c1 * c, 1.0);
		renderer->SmoothLine(q.bl, q.br, cr_colors.c2 * c, 1.0);
		renderer->SmoothLine(q.br, q.tr, cr_colors.c2 * c, 1.0);
	}
	else {	
		renderer->Line(q.tr, q.tl, cr_colors.c1 * c);
		renderer->Line(q.tl, q.bl, cr_colors.c1 * c);
		renderer->Line(q.bl, q.br, cr_colors.c2 * c);
		renderer->Line(q.br, q.tr, cr_colors.c2 * c);
	}
}

bool window::update_geometry( rect &r )
{
	SetWindowPos( _hwnd, NULL, r.x(), r.y(), r.width(), r.height(),
				  SWP_NOOWNERZORDER | SWP_NOZORDER );
	r = query_geometry();
	return true;
}

void context::reset_clip( const rect &r )
{
    glEnable( GL_SCISSOR_TEST );
    glScissor( static_cast<GLint>( r.x() ),
			   static_cast<GLint>( _last_vp[3] - ( r.y() + r.height() ) ),
			   static_cast<GLsizei>( r.width() ),
			   static_cast<GLsizei>( r.height() ) );
}

 bool button(const rect & r, const std::string & label)
 {
     fill_rect(r, { 1, 1, 1 });
     fill_rect(r.shrink(2), r.contains(cursor) ? (mouse_down ? color{ 0.3f, 0.3f, 0.3f } : color{ 0.4f, 0.4f, 0.4f }) : color{ 0.5f, 0.5f, 0.5f });
     glColor3f(1, 1, 1);
     draw_text(r.x0 + 4, r.y1 - 8, label.c_str());
     return click && r.contains(cursor);
 }

bool rect::Intersect( const rect& ref ) const
{
	if( Left() > ref.Right() ) return false;
	if( Right() < ref.Left() ) return false;
	if( Top() > ref.Bottom() ) return false;
	if( Bottom() < ref.Top() ) return false;
	return true;
}

 inline void initialize(device_context* dc, rect pr)
 {
     dc_       =  dc;
     rect_     =  pr = pr.normalize();
     poffset_  = -pr.left_top();
     prect_    =  pr;
     mask_     =  nullptr;
     canvas_   =  std::make_shared<canvas_type>(pr.width(), pr.height());
 }

	constexpr bool contains(
		rect< PositionType, SizeType > const& rect,
		point< DataType > const& point
	){
		return
			point.x() >= rect.left()  &&
			point.y() >= rect.top()   &&
			point.x() <  rect.right() &&
			point.y() <  rect.bottom();
	}

point entity::midpoint() const
{
	if(solid()) {
		const rect r = solid_rect();
		return point(r.x() + r.w()/2, r.y() + r.h()/2);
	}

	const frame& f = current_frame();
	return point(x() + f.width()/2, y() + f.height()/2);
}