src/gui/modalMenu.cpp

   1 /*
   2 Minetest
   3 Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>
   4 Copyright (C) 2018 stujones11, Stuart Jones <stujones111@gmail.com>
   5
   6 This program is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU Lesser General Public License as published by
   8 the Free Software Foundation; either version 2.1 of the License, or
   9 (at your option) any later version.
  10
  11 This program is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU Lesser General Public License for more details.
  15
  16 You should have received a copy of the GNU Lesser General Public License along
  17 with this program; if not, write to the Free Software Foundation, Inc.,
  18 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  19 */
  20
  21 #include <cstdlib>
  22 #include "modalMenu.h"
  23 #include "gettext.h"
  24 #include "porting.h"
  25 #include "settings.h"
  26
  27 #ifdef HAVE_TOUCHSCREENGUI
  28 #include "touchscreengui.h"
  29 #endif
  30
  31 // clang-format off
  32 GUIModalMenu::GUIModalMenu(gui::IGUIEnvironment* env, gui::IGUIElement* parent,
  33         s32 id, IMenuManager *menumgr, bool remap_dbl_click) :
  34                 IGUIElement(gui::EGUIET_ELEMENT, env, parent, id,
  35                                 core::rect<s32>(0, 0, 100, 100)),
  36 #ifdef __ANDROID__
  37                 m_jni_field_name(""),
  38 #endif
  39                 m_menumgr(menumgr),
  40                 m_remap_dbl_click(remap_dbl_click)
  41 {
  42         m_gui_scale = g_settings->getFloat("gui_scaling");
  43 #ifdef __ANDROID__
  44         float d = porting::getDisplayDensity();
  45         m_gui_scale *= 1.1 - 0.3 * d + 0.2 * d * d;
  46 #endif
  47         setVisible(true);
  48         Environment->setFocus(this);
  49         m_menumgr->createdMenu(this);
  50
  51         m_doubleclickdetect[0].time = 0;
  52         m_doubleclickdetect[1].time = 0;
  53
  54         m_doubleclickdetect[0].pos = v2s32(0, 0);
  55         m_doubleclickdetect[1].pos = v2s32(0, 0);
  56 }
  57 // clang-format on
  58
  59 GUIModalMenu::~GUIModalMenu()
  60 {
  61         m_menumgr->deletingMenu(this);
  62 }
  63
  64 void GUIModalMenu::allowFocusRemoval(bool allow)
  65 {
  66         m_allow_focus_removal = allow;
  67 }
  68
  69 bool GUIModalMenu::canTakeFocus(gui::IGUIElement *e)
  70 {
  71         return (e && (e == this || isMyChild(e))) || m_allow_focus_removal;
  72 }
  73
  74 void GUIModalMenu::draw()
  75 {
  76         if (!IsVisible)
  77                 return;
  78
  79         video::IVideoDriver *driver = Environment->getVideoDriver();
  80         v2u32 screensize = driver->getScreenSize();
  81         if (screensize != m_screensize_old) {
  82                 m_screensize_old = screensize;
  83                 regenerateGui(screensize);
  84         }
  85
  86         drawMenu();
  87 }
  88
  89 /*
  90         This should be called when the menu wants to quit.
  91
  92         WARNING: THIS DEALLOCATES THE MENU FROM MEMORY. Return
  93         immediately if you call this from the menu itself.
  94
  95         (More precisely, this decrements the reference count.)
  96 */
  97 void GUIModalMenu::quitMenu()
  98 {
  99         allowFocusRemoval(true);
 100         // This removes Environment's grab on us
 101         Environment->removeFocus(this);
 102         m_menumgr->deletingMenu(this);
 103         this->remove();
 104 #ifdef HAVE_TOUCHSCREENGUI
 105         if (g_touchscreengui && m_touchscreen_visible)
 106                 g_touchscreengui->show();
 107 #endif
 108 }
 109
 110 void GUIModalMenu::removeChildren()
 111 {
 112         const core::list<gui::IGUIElement *> &children = getChildren();
 113         core::list<gui::IGUIElement *> children_copy;
 114         for (gui::IGUIElement *i : children) {
 115                 children_copy.push_back(i);
 116         }
 117
 118         for (gui::IGUIElement *i : children_copy) {
 119                 i->remove();
 120         }
 121 }
 122
 123 // clang-format off
 124 bool GUIModalMenu::DoubleClickDetection(const SEvent &event)
 125 {
 126         /* The following code is for capturing double-clicks of the mouse button
 127          * and translating the double-click into an EET_KEY_INPUT_EVENT event
 128          * -- which closes the form -- under some circumstances.
 129          *
 130          * There have been many github issues reporting this as a bug even though it
 131          * was an intended feature.  For this reason, remapping the double-click as
 132          * an ESC must be explicitly set when creating this class via the
 133          * /p remap_dbl_click parameter of the constructor.
 134          */
 135
 136         if (!m_remap_dbl_click)
 137                 return false;
 138
 139         if (event.MouseInput.Event == EMIE_LMOUSE_PRESSED_DOWN) {
 140                 m_doubleclickdetect[0].pos = m_doubleclickdetect[1].pos;
 141                 m_doubleclickdetect[0].time = m_doubleclickdetect[1].time;
 142
 143                 m_doubleclickdetect[1].pos = m_pointer;
 144                 m_doubleclickdetect[1].time = porting::getTimeMs();
 145         } else if (event.MouseInput.Event == EMIE_LMOUSE_LEFT_UP) {
 146                 u64 delta = porting::getDeltaMs(
 147                         m_doubleclickdetect[0].time, porting::getTimeMs());
 148                 if (delta > 400)
 149                         return false;
 150
 151                 double squaredistance = m_doubleclickdetect[0].pos.
 152                         getDistanceFromSQ(m_doubleclickdetect[1].pos);
 153
 154                 if (squaredistance > (30 * 30)) {
 155                         return false;
 156                 }
 157
 158                 SEvent translated{};
 159                 // translate doubleclick to escape
 160                 translated.EventType            = EET_KEY_INPUT_EVENT;
 161                 translated.KeyInput.Key         = KEY_ESCAPE;
 162                 translated.KeyInput.Control     = false;
 163                 translated.KeyInput.Shift       = false;
 164                 translated.KeyInput.PressedDown = true;
 165                 translated.KeyInput.Char        = 0;
 166                 OnEvent(translated);
 167
 168                 return true;
 169         }
 170
 171         return false;
 172 }
 173 // clang-format on
 174
 175 static bool isChild(gui::IGUIElement *tocheck, gui::IGUIElement *parent)
 176 {
 177         while (tocheck) {
 178                 if (tocheck == parent) {
 179                         return true;
 180                 }
 181                 tocheck = tocheck->getParent();
 182         }
 183         return false;
 184 }
 185
 186 bool GUIModalMenu::preprocessEvent(const SEvent &event)
 187 {
 188 #ifdef __ANDROID__
 189         // clang-format off
 190         // display software keyboard when clicking edit boxes
 191         if (event.EventType == EET_MOUSE_INPUT_EVENT &&
 192                         event.MouseInput.Event == EMIE_LMOUSE_PRESSED_DOWN) {
 193                 gui::IGUIElement *hovered =
 194                         Environment->getRootGUIElement()->getElementFromPoint(
 195                                 core::position2d<s32>(event.MouseInput.X, event.MouseInput.Y));
 196                 if ((hovered) && (hovered->getType() == irr::gui::EGUIET_EDIT_BOX)) {
 197                         bool retval = hovered->OnEvent(event);
 198                         if (retval)
 199                                 Environment->setFocus(hovered);
 200
 201                         std::string field_name = getNameByID(hovered->getID());
 202                         // read-only field
 203                         if (field_name.empty())
 204                                 return retval;
 205
 206                         m_jni_field_name = field_name;
 207                         /*~ Imperative, as in "Enter/type in text".
 208                         Don't forget the space. */
 209                         std::string message = gettext("Enter ");
 210                         std::string label = wide_to_utf8(getLabelByID(hovered->getID()));
 211                         if (label.empty())
 212                                 label = "text";
 213                         message += gettext(label) + ":";
 214
 215                         // single line text input
 216                         int type = 2;
 217
 218                         // multi line text input
 219                         if (((gui::IGUIEditBox *)hovered)->isMultiLineEnabled())
 220                                 type = 1;
 221
 222                         // passwords are always single line
 223                         if (((gui::IGUIEditBox *)hovered)->isPasswordBox())
 224                                 type = 3;
 225
 226                         porting::showInputDialog(gettext("OK"), "",
 227                                 wide_to_utf8(((gui::IGUIEditBox *)hovered)->getText()), type);
 228                         return retval;
 229                 }
 230         }
 231
 232         if (event.EventType == EET_TOUCH_INPUT_EVENT) {
 233                 SEvent translated;
 234                 memset(&translated, 0, sizeof(SEvent));
 235                 translated.EventType = EET_MOUSE_INPUT_EVENT;
 236                 gui::IGUIElement *root = Environment->getRootGUIElement();
 237
 238                 if (!root) {
 239                         errorstream << "GUIModalMenu::preprocessEvent"
 240                                     << " unable to get root element" << std::endl;
 241                         return false;
 242                 }
 243                 gui::IGUIElement *hovered =
 244                                 root->getElementFromPoint(core::position2d<s32>(
 245                                                 event.TouchInput.X, event.TouchInput.Y));
 246
 247                 translated.MouseInput.X = event.TouchInput.X;
 248                 translated.MouseInput.Y = event.TouchInput.Y;
 249                 translated.MouseInput.Control = false;
 250
 251                 if (event.TouchInput.touchedCount == 1) {
 252                         switch (event.TouchInput.Event) {
 253                         case ETIE_PRESSED_DOWN:
 254                                 m_pointer = v2s32(event.TouchInput.X, event.TouchInput.Y);
 255                                 translated.MouseInput.Event = EMIE_LMOUSE_PRESSED_DOWN;
 256                                 translated.MouseInput.ButtonStates = EMBSM_LEFT;
 257                                 m_down_pos = m_pointer;
 258                                 break;
 259                         case ETIE_MOVED:
 260                                 m_pointer = v2s32(event.TouchInput.X, event.TouchInput.Y);
 261                                 translated.MouseInput.Event = EMIE_MOUSE_MOVED;
 262                                 translated.MouseInput.ButtonStates = EMBSM_LEFT;
 263                                 break;
 264                         case ETIE_LEFT_UP:
 265                                 translated.MouseInput.Event = EMIE_LMOUSE_LEFT_UP;
 266                                 translated.MouseInput.ButtonStates = 0;
 267                                 hovered = root->getElementFromPoint(m_down_pos);
 268                                 // we don't have a valid pointer element use last
 269                                 // known pointer pos
 270                                 translated.MouseInput.X = m_pointer.X;
 271                                 translated.MouseInput.Y = m_pointer.Y;
 272
 273                                 // reset down pos
 274                                 m_down_pos = v2s32(0, 0);
 275                                 break;
 276                         default:
 277                                 break;
 278                         }
 279                 } else if ((event.TouchInput.touchedCount == 2) &&
 280                                 (event.TouchInput.Event == ETIE_PRESSED_DOWN)) {
 281                         hovered = root->getElementFromPoint(m_down_pos);
 282
 283                         translated.MouseInput.Event = EMIE_RMOUSE_PRESSED_DOWN;
 284                         translated.MouseInput.ButtonStates = EMBSM_LEFT | EMBSM_RIGHT;
 285                         translated.MouseInput.X = m_pointer.X;
 286                         translated.MouseInput.Y = m_pointer.Y;
 287                         if (hovered)
 288                                 hovered->OnEvent(translated);
 289
 290                         translated.MouseInput.Event = EMIE_RMOUSE_LEFT_UP;
 291                         translated.MouseInput.ButtonStates = EMBSM_LEFT;
 292
 293                         if (hovered)
 294                                 hovered->OnEvent(translated);
 295
 296                         return true;
 297                 } else {
 298                         // ignore unhandled 2 touch events (accidental moving for example)
 299                         return true;
 300                 }
 301
 302                 // check if translated event needs to be preprocessed again
 303                 if (preprocessEvent(translated))
 304                         return true;
 305
 306                 if (hovered) {
 307                         grab();
 308                         bool retval = hovered->OnEvent(translated);
 309
 310                         if (event.TouchInput.Event == ETIE_LEFT_UP)
 311                                 // reset pointer
 312                                 m_pointer = v2s32(0, 0);
 313
 314                         drop();
 315                         return retval;
 316                 }
 317         }
 318 #endif
 319
 320         if (event.EventType == EET_MOUSE_INPUT_EVENT) {
 321                 s32 x = event.MouseInput.X;
 322                 s32 y = event.MouseInput.Y;
 323                 gui::IGUIElement *hovered =
 324                                 Environment->getRootGUIElement()->getElementFromPoint(
 325                                                 core::position2d<s32>(x, y));
 326                 if (!isChild(hovered, this)) {
 327                         if (DoubleClickDetection(event)) {
 328                                 return true;
 329                         }
 330                 }
 331         }
 332         return false;
 333 }
 334
 335 #ifdef __ANDROID__
 336 bool GUIModalMenu::hasAndroidUIInput()
 337 {
 338         // no dialog shown
 339         if (m_jni_field_name.empty())
 340                 return false;
 341
 342         // still waiting
 343         if (porting::getInputDialogState() == -1)
 344                 return true;
 345
 346         // no value abort dialog processing
 347         if (porting::getInputDialogState() != 0) {
 348                 m_jni_field_name.clear();
 349                 return false;
 350         }
 351
 352         return true;
 353 }
 354 #endif