mapview.cpp

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/***********************************************************************
 Freeciv - Copyright (C) 1996 - A Kjeldberg, L Gregersen, P Unold
   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2, or (at your option)
   any later version.
 
   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.
***********************************************************************/
 
#ifdef HAVE_CONFIG_H
#include <fc_config.h>
#endif
 
// Qt
#include <QMouseEvent>
#include <QPainter>
#include <QPixmap>
#include <QToolTip>
#include <QWheelEvent>
 
// utility
#include "log.h"
#include "support.h"
 
// common
#include "calendar.h"
#include "game.h"
#include "map.h"
#include "research.h"
 
// client
#include "climisc.h"
#include "mapctrl_common.h"
#include "menu.h" // gov_menu
#include "movement.h"
#include "overview_common.h"
#include "sprite.h"
#include "repodlgs.h"
#include "text.h"
#include "zoom.h"
 
// gui-qt
#include "colors.h"
#include "fc_client.h"
#include "gui_main.h"
#include "mapview.h"
#include "qtg_cxxside.h"
#include "sidebar.h"
 
const char *get_timeout_label_text();
static int mapview_frozen_level = 0;
extern void destroy_city_dialog();
extern struct canvas *canvas;
 
#define MAX_DIRTY_RECTS 20
static int num_dirty_rects = 0;
static QRect dirty_rects[MAX_DIRTY_RECTS];
 
extern int last_center_enemy;
extern int last_center_capital;
extern int last_center_player_city;
extern int last_center_enemy_city;
 
/**********************************************************************/
bool is_point_in_area(int x, int y, int px, int py, int pxe, int pye)
{
  if (x >= px && y >= py && x <= pxe && y <= pye) {
    return true;
  }
  return false;
}
 
/**********************************************************************/
void draw_calculated_trade_routes(QPainter *painter)
{
  int dx, dy;
  float w, h;
  float x1, y1, x2, y2;
  qtiles qgilles;
  struct city *pcity;
  struct color *pcolor;
  QPen pen;
 
  if (!can_client_control()
      || gui()->trade_gen.cities.empty()) {
    return;
  }
  pcolor = get_color(tileset, COLOR_MAPVIEW_TRADE_ROUTES_NO_BUILT);
  // Draw calculated trade routes
  if (gui_options.draw_city_trade_routes) {
 
    foreach (qgilles, gui()->trade_gen.lines) {
      base_map_distance_vector(&dx, &dy, TILE_XY(qgilles.t1),
                               TILE_XY(qgilles.t2));
      map_to_gui_vector(tileset, 1.0, &w, &h, dx, dy);
 
      tile_to_canvas_pos(&x1, &y1, map_zoom, qgilles.t1);
      tile_to_canvas_pos(&x2, &y2, map_zoom, qgilles.t2);
 
      // Dont draw if route was already established
      if (tile_city(qgilles.t1) && tile_city(qgilles.t2)
          && have_cities_trade_route(tile_city(qgilles.t1),
                                     tile_city(qgilles.t2))) {
        continue;
      }
 
      if (qgilles.autocaravan != nullptr) {
        pcolor = get_color(tileset, COLOR_MAPVIEW_TRADE_ROUTES_SOME_BUILT);
      }
 
      pen.setColor(pcolor->qcolor);
      pen.setStyle(Qt::DashLine);
      pen.setDashOffset(4);
      pen.setWidth(1);
      painter->setPen(pen);
      if (x2 - x1 == w && y2 - y1 == h) {
        painter->drawLine(x1 + tileset_tile_width(tileset) / 2,
                          y1 + tileset_tile_height(tileset) / 2,
                          x1 + tileset_tile_width(tileset) / 2 + w,
                          y1 + tileset_tile_height(tileset) / 2 + h);
        continue;
      }
      painter->drawLine(x2 + tileset_tile_width(tileset) / 2,
                        y2 + tileset_tile_height(tileset) / 2,
                        x2 + tileset_tile_width(tileset) / 2 - w,
                        y2 + tileset_tile_height(tileset) / 2 - h);
    }
  }
  // Draw virtual cities
  foreach (pcity, gui()->trade_gen.virtual_cities) {
    float canvas_x, canvas_y;
    if (pcity->tile != nullptr
        && tile_to_canvas_pos(&canvas_x, &canvas_y, map_zoom, pcity->tile)) {
      painter->drawPixmap(static_cast<int>(canvas_x),
                          static_cast<int>(canvas_y),
                          *get_attention_crosshair_sprite(tileset)->pm);
    }
  }
}
 
/**********************************************************************/
mr_idle::mr_idle()
{
  connect(&timer, &QTimer::timeout, this, &mr_idle::idling);
  timer.start(5);
}
 
/**********************************************************************/
mr_idle::~mr_idle()
{
  call_me_back *cb;
 
  while (!callback_list.isEmpty()) {
    cb = callback_list.dequeue();
    delete cb;
  }
}
 
/**********************************************************************/
void mr_idle::idling()
{
  call_me_back *cb;
 
  while (!callback_list.isEmpty()) {
    cb = callback_list.dequeue();
    (cb->callback) (cb->data);
    delete cb;
  }
}
 
/**********************************************************************/
void mr_idle::add_callback(call_me_back *cb)
{
  callback_list.enqueue(cb);
}
 
/**********************************************************************/
map_view::map_view() : QWidget()
{
  menu_click = false;
  cursor = -1;
  QTimer *timer = new QTimer(this);
  setAttribute(Qt::WA_OpaquePaintEvent, true);
  connect(timer, &QTimer::timeout, this, &map_view::timer_event);
  timer->start(200);
  resize(0, 0);
  setMouseTracking(true);
  stored_autocenter = gui_options.auto_center_on_unit;
  setSizePolicy(QSizePolicy::Ignored, QSizePolicy::Ignored);
}
 
/**********************************************************************/
void map_view::update_cursor(enum cursor_type ct)
{
  int i;
 
  if (ct == CURSOR_DEFAULT) {
    setCursor(Qt::ArrowCursor);
    cursor = -1;
    return;
  }
  cursor_frame = 0;
  i = static_cast<int>(ct);
  cursor = i;
  setCursor(*(gui()->fc_cursors[i][0]));
}
 
/**********************************************************************/
void map_view::timer_event()
{
  if (gui()->infotab->underMouse()
      || gui()->minimapview_wdg->underMouse()
      || gui()->sidebar_wdg->underMouse()) {
    update_cursor(CURSOR_DEFAULT);
    return;
  }
  if (cursor == -1) {
    return;
  }
  cursor_frame++;
  if (cursor_frame == NUM_CURSOR_FRAMES) {
    cursor_frame = 0;
  }
  setCursor(*(gui()->fc_cursors[cursor][cursor_frame]));
}
 
/**********************************************************************/
void map_view::update_font(const QString &name, const QFont &font)
{
  if (name == fonts::city_names
      || name == fonts::city_productions) {
    update_map_canvas_visible();
  }
}
 
/**********************************************************************/
void map_view::focusOutEvent(QFocusEvent *event)
{
  update_cursor(CURSOR_DEFAULT);
}
 
/**********************************************************************/
void map_view::leaveEvent(QEvent *event)
{
  update_cursor(CURSOR_DEFAULT);
}
 
/**********************************************************************/
void map_view::paintEvent(QPaintEvent *event)
{
  QPainter painter;
 
  painter.begin(this);
  paint(&painter, event);
  painter.end();
}
 
/**********************************************************************/
void map_view::paint(QPainter *painter, QPaintEvent *event)
{
  painter->drawPixmap(event->rect(), mapview.store->map_pixmap,
                      event->rect());
  draw_calculated_trade_routes(painter);
}
 
/**********************************************************************/
void map_view::resume_searching(int pos_x, int pos_y, int &w, int &h,
                                int wdth, int hght, int recursive_nr)
{
  int new_pos_x, new_pos_y;
 
  recursive_nr++;
  new_pos_x = pos_x;
  new_pos_y = pos_y;
 
  if (pos_y + hght + 4 < height() && pos_x > width() / 2) {
    new_pos_y = pos_y + 5;
  } else if (pos_x > 0 && pos_y > 10) {
    new_pos_x = pos_x - 5;
  } else if (pos_y > 0) {
    new_pos_y = pos_y - 5;
  } else if (pos_x + wdth + 4 < this->width()) {
    new_pos_x = pos_x + 5;
  }
  find_place(new_pos_x, new_pos_y, w, h, wdth, hght, recursive_nr);
}
 
/**********************************************************************/
void map_view::find_place(int pos_x, int pos_y, int &w, int &h, int wdth,
                          int hght, int recursive_nr)
{
  int i;
  int x, y, xe, ye;
  QList <fcwidget *>widgets = this->findChildren <fcwidget *>();
  bool cont_searching = false;
 
  if (recursive_nr >= 1000) {
    // Give up searching position
    return;
  }
  for (i = 0; i < widgets.count(); i++) {
    if (!widgets[i]->isVisible()) {
      continue;
    }
    x = widgets[i]->pos().x();
    y = widgets[i]->pos().y();
 
    if (x == 0 && y ==0) {
      continue;
    }
    xe = widgets[i]->pos().x() + widgets[i]->width();
    ye = widgets[i]->pos().y() + widgets[i]->height();
 
    if (is_point_in_area(pos_x, pos_y, x, y, xe, ye)) {
      cont_searching = true;
    }
    if (is_point_in_area(pos_x + wdth, pos_y, x, y, xe, ye)) {
      cont_searching = true;
    }
    if (is_point_in_area(pos_x + wdth, pos_y + hght, x, y, xe, ye)) {
      cont_searching = true;
    }
    if (is_point_in_area(pos_x, pos_y + hght, x, y, xe, ye)) {
      cont_searching = true;
    }
    if (is_point_in_area(pos_x + wdth / 2, pos_y + hght / 2, x, y, xe, ye)) {
      cont_searching = true;
    }
  }
  w = pos_x;
  h = pos_y;
  if (cont_searching) {
    resume_searching(pos_x, pos_y, w, h, wdth, hght, recursive_nr);
  }
}
 
/**********************************************************************/
move_widget::move_widget(QWidget *parent) : QLabel()
{
  QPixmap *pix;
 
  setParent(parent);
  setCursor(Qt::SizeAllCursor);
  pix = fc_icons::instance()->get_pixmap("move");
  setPixmap(*pix);
  delete pix;
  setFixedSize(16, 16);
}
 
/**********************************************************************/
void move_widget::put_to_corner()
{
  move(0, 0);
}
 
/**********************************************************************/
void move_widget::mouseMoveEvent(QMouseEvent *event)
{
  if (!gui()->interface_locked) {
    parentWidget()->move(event->globalPosition().toPoint() - point);
  }
}
 
/**********************************************************************/
void move_widget::mousePressEvent(QMouseEvent *event)
{
  if (!gui()->interface_locked) {
    point = event->globalPosition().toPoint()
      - parentWidget()->geometry().topLeft();
  }
 
  update();
}
 
/**********************************************************************/
resize_widget::resize_widget(QWidget *parent) : QLabel()
{
  QPixmap *pix;
 
  setParent(parent);
  setCursor(Qt::SizeFDiagCursor);
  pix = fc_icons::instance()->get_pixmap("resize");
  setPixmap(*pix);
  delete pix;
}
 
/**********************************************************************/
void resize_widget::put_to_corner()
{
  move(parentWidget()->width() - width(),
       parentWidget()->height() - height());
}
 
/**********************************************************************/
void resize_widget::mouseMoveEvent(QMouseEvent *event)
{
  QPoint qp, np;
 
  if (gui()->interface_locked) {
    return;
  }
 
  qp = event->globalPosition().toPoint();
  np.setX(qp.x() - point.x());
  np.setY(qp.y() - point.y());
  np.setX(qMax(np.x(), 32));
  np.setY(qMax(np.y(), 32));
  parentWidget()->resize(np.x(), np.y());
}
 
/**********************************************************************/
void resize_widget::mousePressEvent(QMouseEvent *event)
{
  QPoint qp;
 
  if (gui()->interface_locked) {
    return;
  }
 
  qp = event->globalPosition().toPoint();
  point.setX(qp.x() - parentWidget()->width());
  point.setY(qp.y() - parentWidget()->height());
  update();
}
 
/**********************************************************************/
close_widget::close_widget(QWidget *parent) : QLabel()
{
  QPixmap *pix;
 
  setParent(parent);
  setCursor(Qt::ArrowCursor);
  pix = fc_icons::instance()->get_pixmap("close");
  setPixmap(*pix);
  delete pix;
}
 
/**********************************************************************/
void close_widget::put_to_corner()
{
  move(parentWidget()->width()-width(), 0);
}
 
/**********************************************************************/
void close_widget::mousePressEvent(QMouseEvent* event)
{
  if (gui()->interface_locked) {
    return;
  }
  if (event->button() == Qt::LeftButton) {
    parentWidget()->hide();
    notify_parent();
  }
}
 
/**********************************************************************/
void close_widget::notify_parent()
{
  fcwidget *fcw;
 
  fcw = reinterpret_cast<fcwidget *>(parentWidget());
  fcw->update_menu();
}
 
/**********************************************************************/
minimap_view::minimap_view(QWidget *parent) : fcwidget()
{
  setParent(parent);
  setAttribute(Qt::WA_OpaquePaintEvent, true);
  w_ratio = 0.0;
  h_ratio = 0.0;
  // Dark magic: This call is required for the widget to work.
  resize(0, 0);
  background = QBrush(QColor (0, 0, 0));
  setCursor(Qt::CrossCursor);
  rw = new resize_widget(this);
  rw->put_to_corner();
  pix = new QPixmap;
  scale_factor = 1.0;
  connect(&thread, &minimap_thread::rendered_image,
          this, &minimap_view::update_pixmap);
}
 
/**********************************************************************/
minimap_view::~minimap_view()
{
  if (pix) {
    delete pix;
  }
}
 
/**********************************************************************/
void minimap_view::paintEvent(QPaintEvent *event)
{
  QPainter painter;
 
  painter.begin(this);
  paint(&painter, event);
  painter.end();
}
 
/**********************************************************************/
void minimap_view::scale(double factor)
{
  scale_factor *= factor;
  if (scale_factor < 1) {
    scale_factor = 1.0;
  };
  update_image();
}
 
/**********************************************************************/
static void gui_to_overview(int *ovr_x, int *ovr_y, int gui_x, int gui_y)
{
  double ntl_x, ntl_y;
  const double gui_xd = gui_x, gui_yd = gui_y;
  const double W = tileset_tile_width(tileset);
  const double H = tileset_tile_height(tileset);
  double map_x, map_y;
 
  if (tileset_is_isometric(tileset)) {
    map_x = (gui_xd * H + gui_yd * W) / (W * H);
    map_y = (gui_yd * W - gui_xd * H) / (W * H);
  } else {
    map_x = gui_xd / W;
    map_y = gui_yd / H;
  }
 
  if (MAP_IS_ISOMETRIC) {
    ntl_y = map_x + map_y - MAP_NATIVE_WIDTH;
    ntl_x = 2 * map_x - ntl_y;
  } else {
    ntl_x = map_x;
    ntl_y = map_y;
  }
 
  *ovr_x = floor((ntl_x - (double)gui_options.overview.map_x0)
           * OVERVIEW_TILE_SIZE);
  *ovr_y = floor((ntl_y - (double)gui_options.overview.map_y0)
           * OVERVIEW_TILE_SIZE);
 
  if (current_wrap_has_flag(WRAP_X)) {
    *ovr_x = FC_WRAP(*ovr_x, MAP_NATURAL_WIDTH * OVERVIEW_TILE_SIZE);
  } else {
    if (MAP_IS_ISOMETRIC) {
      *ovr_x -= OVERVIEW_TILE_SIZE;
    }
  }
  if (current_wrap_has_flag(WRAP_Y)) {
    *ovr_y = FC_WRAP(*ovr_y, MAP_NATURAL_HEIGHT * OVERVIEW_TILE_SIZE);
  }
}
 
/**********************************************************************/
void minimap_view::update_menu()
{
  ::gui()->menu_bar->minimap_status->setChecked(false);
}
 
/**********************************************************************/
void minimap_view::moveEvent(QMoveEvent* event)
{
  position = event->pos();
}
 
/**********************************************************************/
void minimap_view::showEvent(QShowEvent* event)
{
  move(position);
  event->setAccepted(true);
}
 
/**********************************************************************/
void minimap_view::draw_viewport(QPainter *painter)
{
  int i, x[4], y[4];
  int src_x, src_y, dst_x, dst_y;
 
  if (!gui_options.overview.map) {
    return;
  }
 
  gui_to_overview(&x[0], &y[0], mapview.gui_x0, mapview.gui_y0);
  gui_to_overview(&x[1], &y[1], mapview.gui_x0 + mapview.width,
                  mapview.gui_y0);
  gui_to_overview(&x[2], &y[2], mapview.gui_x0 + mapview.width,
                  mapview.gui_y0 + mapview.height);
  gui_to_overview(&x[3], &y[3], mapview.gui_x0,
                  mapview.gui_y0 + mapview.height);
  painter->setPen(QColor(Qt::white));
 
  if (scale_factor > 1) {
    for (i = 0; i < 4; i++) {
      scale_point(x[i], y[i]);
    }
  }
 
  for (i = 0; i < 4; i++) {
    src_x = x[i] * w_ratio;
    src_y = y[i] * h_ratio;
    dst_x = x[(i + 1) % 4] * w_ratio;
    dst_y = y[(i + 1) % 4] * h_ratio;
    painter->drawLine(src_x, src_y, dst_x, dst_y);
  }
}
 
/**********************************************************************/
void minimap_view::scale_point(int &x, int &y)
{
  int ax, bx;
  int dx, dy;
 
  gui_to_overview(&ax, &bx, mapview.gui_x0 + mapview.width / 2,
                  mapview.gui_y0 + mapview.height / 2);
  x = qRound(x * scale_factor);
  y = qRound(y * scale_factor);
  dx = qRound(ax * scale_factor - gui_options.overview.width / 2);
  dy = qRound(bx * scale_factor - gui_options.overview.height / 2);
  x = x - dx;
  y = y - dy;
}
 
/**********************************************************************/
void unscale_point(double scale_factor, int &x, int &y)
{
  int ax, bx;
  int dx, dy;
 
  gui_to_overview(&ax, &bx, mapview.gui_x0 + mapview.width / 2,
                  mapview.gui_y0 + mapview.height / 2);
  dx = qRound(ax * scale_factor - gui_options.overview.width / 2);
  dy = qRound(bx * scale_factor - gui_options.overview.height / 2);
  x = x + dx;
  y = y + dy;
  x = qRound(x / scale_factor);
  y = qRound(y / scale_factor);
}
 
/**********************************************************************/
void minimap_view::reset()
{
  scale_factor = 1;
}
 
/**********************************************************************/
void minimap_view::update_pixmap(const QImage &image)
{
  *pix = QPixmap::fromImage(image);
  update();
}
 
/**********************************************************************/
minimap_thread::minimap_thread(QObject *parent) : QThread(parent)
{
}
 
/**********************************************************************/
minimap_thread::~minimap_thread()
{
  wait();
}
 
/**********************************************************************/
void minimap_thread::render(double scale_factor, int width, int height)
{
  QMutexLocker locker(&mutex);
  mini_width = width;
  mini_height = height;
  scale = scale_factor;
  start(LowPriority);
}
 
/**********************************************************************/
void minimap_thread::run()
{
  QImage tpix;
  QImage gpix;
  QImage image(QSize(mini_width, mini_height), QImage::Format_RGB32);
  QImage bigger_pix(gui_options.overview.width * 2,
                    gui_options.overview.height * 2, QImage::Format_RGB32);
  int delta_x, delta_y;
  int x, y, ix, iy;
  float wf, hf;
  QPixmap *src, *dst;
 
  mutex.lock();
  if (gui_options.overview.map != nullptr) {
    if (scale > 1) {
      /* move minimap now,
         scale later and draw without looking for origin */
      src = &gui_options.overview.map->map_pixmap;
      dst = &gui_options.overview.window->map_pixmap;
      x = gui_options.overview.map_x0;
      y = gui_options.overview.map_y0;
      ix = gui_options.overview.width - x;
      iy = gui_options.overview.height - y;
      pixmap_copy(dst, src, 0, 0, ix, iy, x, y);
      pixmap_copy(dst, src, 0, y, ix, 0, x, iy);
      pixmap_copy(dst, src, x, 0, 0, iy, ix, y);
      pixmap_copy(dst, src, x, y, 0, 0, ix, iy);
      tpix = gui_options.overview.window->map_pixmap.toImage();
      wf = static_cast <float>(gui_options.overview.width) / scale;
      hf = static_cast <float>(gui_options.overview.height) / scale;
      x = 0;
      y = 0;
      unscale_point(scale, x, y);
      bigger_pix.fill(Qt::black);
      delta_x = gui_options.overview.width / 2;
      delta_y = gui_options.overview.height / 2;
      image_copy(&bigger_pix, &tpix, 0, 0, delta_x, delta_y,
                 gui_options.overview.width, gui_options.overview.height);
      gpix = bigger_pix.copy(delta_x + x, delta_y + y, wf, hf);
      image = gpix.scaled(mini_width, mini_height,
                          Qt::IgnoreAspectRatio, Qt::FastTransformation);
    } else {
      tpix = gui_options.overview.map->map_pixmap.toImage();
      image = tpix.scaled(mini_width, mini_height,
                          Qt::IgnoreAspectRatio, Qt::FastTransformation);
    }
  }
  emit rendered_image(image);
  mutex.unlock();
}
 
/**********************************************************************/
void minimap_view::update_image()
{
  if (isHidden()) {
    return;
  }
  thread.render(scale_factor, width(), height());
}
 
/**********************************************************************/
void minimap_view::paint(QPainter * painter, QPaintEvent * event)
{
  int x, y, ix, iy;
 
  x = gui_options.overview.map_x0 * w_ratio;
  y = gui_options.overview.map_y0 * h_ratio;
  ix = pix->width() - x;
  iy = pix->height() - y;
 
  if (scale_factor > 1) {
    painter->drawPixmap(0, 0, *pix, 0, 0, pix->width(), pix->height());
  } else {
    painter->drawPixmap(ix, iy, *pix, 0, 0, x, y);
    painter->drawPixmap(ix, 0, *pix, 0, y, x, iy);
    painter->drawPixmap(0, iy, *pix, x, 0, ix, y);
    painter->drawPixmap(0, 0, *pix, x, y, ix, iy);
  }
  painter->setPen(QColor(palette().color(QPalette::Highlight)));
  painter->drawRect(0, 0, width() - 1, height() - 1);
  draw_viewport(painter);
  rw->put_to_corner();
}
 
/**********************************************************************/
void minimap_view::resizeEvent(QResizeEvent* event)
{
  QSize size;
  size = event->size();
 
  if (C_S_RUNNING <= client_state() && size.width() > 0
      && size.height() > 0) {
    w_ratio = static_cast<float>(width()) / gui_options.overview.width;
    h_ratio = static_cast<float>(height()) / gui_options.overview.height;
    gui()->qt_settings.minimap_width = static_cast<float>(size.width())
                                       / mapview.width;
    gui()->qt_settings.minimap_height = static_cast<float>(size.height())
                                        / mapview.height;
  }
  update_image();
}
 
/**********************************************************************/
void minimap_view::wheelEvent(QWheelEvent *event)
{
  if (event->angleDelta().y() > 0) {
    zoom_in();
  } else {
    zoom_out();
  }
  event->accept();
}
 
/**********************************************************************/
void minimap_view::zoom_in()
{
  if (scale_factor < gui_options.overview.width / 8) {
    scale(1.2);
  }
}
 
/**********************************************************************/
void minimap_view::zoom_out()
{
  scale(0.833);
}
 
/**********************************************************************/
void minimap_view::mousePressEvent(QMouseEvent *event)
{
  int fx, fy;
  int x, y;
 
  if (event->button() == Qt::LeftButton) {
    if (gui()->interface_locked) {
      return;
    }
    cursor = event->globalPosition().toPoint() - geometry().topLeft();
  }
 
  if (event->button() == Qt::RightButton) {
    cursor = event->pos();
    fx = event->pos().x();
    fy = event->pos().y();
    fx = qRound(fx / w_ratio);
    fy = qRound(fy / h_ratio);
    if (scale_factor > 1) {
      unscale_point(scale_factor, fx, fy);
    }
    fx = qMax(fx, 1);
    fy = qMax(fy, 1);
    fx = qMin(fx, gui_options.overview.width - 1);
    fy = qMin(fy, gui_options.overview.height - 1);
    overview_to_map_pos(&x, &y, fx, fy);
    center_tile_mapcanvas(map_pos_to_tile(&(wld.map), x, y));
    update_image();
  }
 
  event->setAccepted(true);
}
 
/**********************************************************************/
void minimap_view::mouseMoveEvent(QMouseEvent *event)
{
  if (gui()->interface_locked) {
    return;
  }
 
  if (event->buttons() & Qt::LeftButton) {
    QPoint p, r;
 
    p = event->pos();
    r = mapTo(gui()->mapview_wdg, p);
    p = r - p;
    move(event->globalPosition().toPoint() - cursor);
    setCursor(Qt::SizeAllCursor);
    gui()->qt_settings.minimap_x = static_cast<float>(p.x()) / mapview.width;
    gui()->qt_settings.minimap_y = static_cast<float>(p.y())
                                   / mapview.height;
  }
}
 
/**********************************************************************/
void minimap_view::mouseReleaseEvent(QMouseEvent* event)
{
  setCursor(Qt::CrossCursor);
}
 
 
/**********************************************************************/
void update_info_label(void)
{
  gui()->update_info_label();
}
 
 
/**********************************************************************/
void fc_client::update_info_label(void)
{
  QString s, eco_info;
 
  if (current_page() != PAGE_GAME) {
    return;
  }
  if (update_info_timer == nullptr) {
    update_info_timer = new QTimer();
    update_info_timer->setSingleShot(true);
    connect(update_info_timer, &QTimer::timeout,
            this, &fc_client::update_info_label);
    update_info_timer->start(300);
    return;
  }
 
  if (update_info_timer->remainingTime() > 0) {
    return;
  }
  update_sidebar_tooltips();
  if (head_of_units_in_focus() != nullptr) {
    real_menus_update();
  }
  /* TRANS: T is shortcut from Turn */
  s = QString(_("%1 \nT:%2")).arg(calendar_text(),
                                  QString::number(game.info.turn));
 
  sw_map->set_custom_labels(s);
  sw_map->update_final_pixmap();
 
  set_indicator_icons(client_research_sprite(),
                      client_warming_sprite(),
                      client_cooling_sprite(), client_government_sprite());
 
  if (client.conn.playing != nullptr) {
    if (player_get_expected_income(client.conn.playing) > 0) {
      eco_info = QString(_("%1 (+%2)"))
                 .arg(QString::number(client.conn.playing->economic.gold),
                      QString::number(player_get_expected_income(client.conn.playing)));
    } else {
      eco_info = QString(_("%1 (%2)"))
                 .arg(QString::number(client.conn.playing->economic.gold),
                      QString::number(player_get_expected_income(client.conn.playing)));
    }
    sw_economy->set_custom_labels(eco_info);
  } else {
    sw_economy->set_custom_labels("");
  }
  sw_tax->update_final_pixmap();
  sw_economy->update_final_pixmap();
  delete update_info_timer;
  update_info_timer = nullptr;
}
 
 
/**********************************************************************/
void update_unit_info_label(struct unit_list *punitlist)
{
  if (gui()->unitinfo_wdg->isVisible()) {
    gui()->unitinfo_wdg->update_actions(nullptr);
  }
}
 
/**********************************************************************/
void update_mouse_cursor(enum cursor_type new_cursor_type)
{
  gui()->mapview_wdg->update_cursor(new_cursor_type);
}
 
/**********************************************************************/
void qtg_update_timeout_label(void)
{
  gui()->sw_endturn->set_custom_labels(QString(get_timeout_label_text()));
  gui()->sw_endturn->update_final_pixmap();
}
 
/**********************************************************************/
void update_turn_done_button(bool do_restore)
{
  if (!get_turn_done_button_state()) {
    return;
  }
  side_blink_endturn(do_restore);
}
 
 
/**********************************************************************/
void set_indicator_icons(struct sprite *bulb, struct sprite *sol,
                         struct sprite *flake, struct sprite *gov)
{
  gui()->sw_indicators->update_final_pixmap();
}
 
/**********************************************************************/
struct canvas *get_overview_window(void)
{
  gui()->minimapview_wdg->update_image();
  return nullptr;
}
 
/**********************************************************************/
static void flush_mapcanvas(int canvas_x, int canvas_y,
                            int pixel_width, int pixel_height)
{
  gui()->mapview_wdg->repaint(canvas_x, canvas_y, pixel_width, pixel_height);
}
 
/**********************************************************************/
void dirty_rect(int canvas_x, int canvas_y,
                int pixel_width, int pixel_height)
{
  if (mapview_is_frozen()) {
    return;
  }
  if (num_dirty_rects < MAX_DIRTY_RECTS) {
    dirty_rects[num_dirty_rects].setX(canvas_x);
    dirty_rects[num_dirty_rects].setY(canvas_y);
    dirty_rects[num_dirty_rects].setWidth(pixel_width);
    dirty_rects[num_dirty_rects].setHeight(pixel_height);
    num_dirty_rects++;
  }
}
 
/**********************************************************************/
void dirty_all(void)
{
  if (mapview_is_frozen()) {
    return;
  }
  num_dirty_rects = MAX_DIRTY_RECTS;
}
 
/**********************************************************************/
void flush_dirty(void)
{
  if (mapview_is_frozen()) {
    return;
  }
  if (num_dirty_rects == MAX_DIRTY_RECTS) {
    flush_mapcanvas(0, 0, gui()->mapview_wdg->width(),
                    gui()->mapview_wdg->height());
  } else {
    int i;
 
    for (i = 0; i < num_dirty_rects; i++) {
      flush_mapcanvas(dirty_rects[i].x(), dirty_rects[i].y(),
                      dirty_rects[i].width(), dirty_rects[i].height());
    }
  }
  num_dirty_rects = 0;
}
 
/**********************************************************************/
void gui_flush(void)
{
  gui()->mapview_wdg->update();
}
 
/**********************************************************************/
void update_map_canvas_scrollbars(void)
{
  gui()->mapview_wdg->update();
}
 
/**********************************************************************/
void update_map_canvas_scrollbars_size(void)
{
  // PORTME
}
 
/**********************************************************************/
void update_city_descriptions(void)
{
  update_map_canvas_visible();
}
 
/**********************************************************************/
void pixmap_put_overlay_tile(int canvas_x, int  canvas_y,
                              struct sprite *ssprite)
{
  if (!ssprite) {
    return;
  }
 
  // PORTME
}
 
/**********************************************************************/
void put_cross_overlay_tile(struct tile *ptile)
{
  float canvas_x, canvas_y;
 
  if (tile_to_canvas_pos(&canvas_x, &canvas_y, map_zoom, ptile)) {
    pixmap_put_overlay_tile(canvas_x, canvas_y,
                            get_attention_crosshair_sprite(tileset));
  }
 
}
 
/**********************************************************************/
void draw_selection_rectangle(int canvas_x, int canvas_y, int w, int h)
{
  // PORTME
}
 
/**********************************************************************/
void tileset_changed(void)
{
  int i;
  science_report *sci_rep;
  QWidget *w;
 
  update_unit_info_label(get_units_in_focus());
  destroy_city_dialog();
  // Update science report if open
  if (gui()->is_repo_dlg_open("SCI")) {
    i = gui()->gimme_index_of("SCI");
    fc_assert(i != -1);
    w = gui()->game_tab_widget->widget(i);
    sci_rep = reinterpret_cast<science_report*>(w);
    sci_rep->reset_tree();
    sci_rep->update_report();
    sci_rep->repaint();
  }
}
 
/**********************************************************************/
void get_overview_area_dimensions(int *width, int *height)
{
  *width = 0;
  *height = 0;
}
 
/**********************************************************************/
void overview_size_changed(void)
{
  gui()->minimapview_wdg->resize(0, 0);
  gui()->minimapview_wdg->move(gui()->qt_settings.minimap_x
                               * mapview.width,
                               gui()->qt_settings.minimap_y
                               * mapview.height);
  gui()->minimapview_wdg->resize(gui()->qt_settings.minimap_width
                                 * mapview.width,
                                 gui()->qt_settings.minimap_height
                                 * mapview.height);
}
 
/**********************************************************************/
void update_overview_scroll_window_pos(int x, int y)
{
  // TODO: PORTME.
}
 
/**********************************************************************/
bool mapview_is_frozen(void)
{
  return (0 < mapview_frozen_level);
}
 
/**********************************************************************/
void mapview_freeze(void)
{
  mapview_frozen_level++;
}
 
/**********************************************************************/
void mapview_thaw(void)
{
  if (1 < mapview_frozen_level) {
    mapview_frozen_level--;
  } else {
    fc_assert(0 < mapview_frozen_level);
    mapview_frozen_level = 0;
    dirty_all();
  }
}
 
/**********************************************************************/
info_tile::info_tile(struct tile *ptile, QWidget *parent): QLabel(parent)
{
  setParent(parent);
  info_font = *fc_font::instance()->get_font(fonts::notify_label);
  itile = ptile;
  calc_size();
}
 
/**********************************************************************/
void info_tile::calc_size()
{
  QFontMetrics fm(info_font);
  QString str;
  float x, y;
  int w = 0;
 
  str = popup_info_text(itile);
  str_list = str.split("\n");
 
  foreach(str, str_list) {
    w = qMax(w, fm.horizontalAdvance(str));
  }
  setFixedHeight(str_list.count() * (fm.height() + 5));
  setFixedWidth(w + 10);
 
  if (tile_to_canvas_pos(&x, &y, map_zoom, itile)) {
    int fin_x;
    int fin_y;
    int wh = height();
    int ww = width();
    int pw = parentWidget()->width();
 
    fin_x = x;
    if (y - wh > 0) {
      fin_y = y - wh;
    } else {
      fin_y = y + tileset_tile_height(tileset);
    }
    if (x + ww > pw) {
      fin_x = pw - ww;
    }
    move(fin_x, fin_y);
  }
}
 
/**********************************************************************/
void info_tile::paint(QPainter *painter, QPaintEvent *event)
{
  QFontMetrics fm(info_font);
  int pos, h;
 
  h = fm.height();
  pos = h;
  painter->setFont(info_font);
  for (int i = 0; i < str_list.count(); i++) {
    painter->drawText(5, pos, str_list.at(i));
    pos = pos + 5 + h;
  }
}
 
/**********************************************************************/
void info_tile::paintEvent(QPaintEvent *event)
{
  QPainter painter;
 
  painter.begin(this);
  paint(&painter, event);
  painter.end();
}
 
/**********************************************************************/
void info_tile::update_font(const QString &name, const QFont &font)
{
  if (name == fonts::notify_label) {
    info_font = font;
    calc_size();
    update();
  }
}
 
/**********************************************************************/
void qtg_start_turn()
{
  show_new_turn_info();
  last_center_enemy = 0;
  last_center_capital = 0;
  last_center_player_city = 0;
  last_center_enemy_city = 0;
}
 
/**********************************************************************/
void qtg_map_canvas_size_refresh(void)
{
  /* Needed only with full screen zoom mode.
   * Not needed, nor implemented, in this client. */
  fc_assert(false);
}