helpwidget.cpp

#include "helpwidget.h"

#include <QPainter>
#include "basicpainter.h"
#include "gamecommonitems.h"
#include "othergameinit.h"
#include "abstractrule.h"
#include "pixmapoperations.h"

#define LOGICAL_WIDTH  1024
#define LOGICAL_HEIGHT 600

HelpWidget::HelpWidget() :
    dy(0)
{
  // Init he pixmap
  p = QPixmap(":/images/helpwidget/helpwidget.png");

  // Create the item and initialize it
  exitItem = new ButtonItem("Exit");
  exitItem->setPos(QPointF(0.5, 0.95));
  myItems.push_back(exitItem);

  // No items was chosen
  itemAtPressPos = NULL;
}

void HelpWidget::makePixmap(
#ifdef USE_PIXMAP
      QPixmap& pixmap,
#else
      QPainter* painter,
#endif
                                   int width,
                                   int height)
{
#ifdef USE_PIXMAP
      makeBasicPixmap(pixmap, width, height);
      addEffect(pixmap, width, height);
#else
      makeBasicPixmap(painter, width, height);
      addEffect(painter, width, height);
#endif
}

void HelpWidget::makeBasicPixmap(
#ifdef USE_PIXMAP
      QPixmap& pixmap,
#else
      QPainter* painter,
#endif
                                   int width,
                                   int height)
{
#ifdef USE_PIXMAP
  pixmap = QPixmap(width, height);

  // Fill the pixmap with black background
  pixmap.fill(Qt::black);

  // Get the painter
  QPainter *painter = new QPainter(&pixmap);
#else
  painter->fillRect(0,0,width,height,QColor(0,0,0));
#endif

  // The scale of the pixmap
  double scale;

  // Calculate the scale
  scale = 1.0 * width / p.width();

  // Calculate the deviation in y direction
  dy = qMax(qMin(dy, p.height() * scale - height), 0.0);

  // Draw the pixmap
  painter->drawPixmap(0,
                      -dy,
                      width,
                      p.height() * scale,
                      p
                      );

  // Paint the items
  BasicPainter::paintItems(painter,
                           myItems,
                           width,
                           height,
                           0);

#ifdef USE_PIXMAP
  // End the paint and release the space
  painter->end();
  delete painter;
#endif
}

void HelpWidget::addEffect(
#ifdef USE_PIXMAP
      QPixmap& pixmap,
#else
      QPainter* painter,
#endif
                                   int width,
                                   int height){}

QPointF HelpWidget::toScene(double xRate, double yRate)
{
  return QPointF(xRate * LOGICAL_WIDTH,
                 yRate * LOGICAL_HEIGHT);
}

void HelpWidget::dealPressed(QPointF mousePos, Qt::MouseButton button)
{
  // Choose the correct item at press position
  lastPos = mousePos;
  if (exitItem->in(mousePos, LOGICAL_WIDTH, LOGICAL_HEIGHT))
    itemAtPressPos = exitItem;
}

void HelpWidget::dealMoved(QPointF mousePos, Qt::MouseButton button)
{
  // Recalculate the dy
  dy = dy + lastPos.y() - mousePos.y();

  // Record the position of the mouse
  lastPos = mousePos;
}

void HelpWidget::dealReleased(QPointF mousePos, Qt::MouseButton button)
{
  if (itemAtPressPos == exitItem &&
      exitItem->in(mousePos, LOGICAL_WIDTH, LOGICAL_HEIGHT))
  {
    // Exit
    emit giveControlTo(NULL, true);
    delete this;
    return;
  }

  itemAtPressPos = NULL;
}

HelpWidget::~HelpWidget()
{
  // Release the space
  for (int i = 0;i < myItems.size();++i)
    delete myItems[i];
}