src/gui/guiInventoryList.cpp

   1 /*
   2 Minetest
   3 Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>
   4
   5 This program is free software; you can redistribute it and/or modify
   6 it under the terms of the GNU Lesser General Public License as published by
   7 the Free Software Foundation; either version 2.1 of the License, or
   8 (at your option) any later version.
   9
  10 This program is distributed in the hope that it will be useful,
  11 but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 GNU Lesser General Public License for more details.
  14
  15 You should have received a copy of the GNU Lesser General Public License along
  16 with this program; if not, write to the Free Software Foundation, Inc.,
  17 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18 */
  19
  20 #include "guiInventoryList.h"
  21 #include "guiFormSpecMenu.h"
  22 #include "client/hud.h"
  23 #include "client/client.h"
  24
  25 GUIInventoryList::GUIInventoryList(gui::IGUIEnvironment *env,
  26         gui::IGUIElement *parent,
  27         s32 id,
  28         const core::rect<s32> &rectangle,
  29         InventoryManager *invmgr,
  30         const InventoryLocation &inventoryloc,
  31         const std::string &listname,
  32         const v2s32 &geom,
  33         const s32 start_item_i,
  34         const v2s32 &slot_size,
  35         const v2f32 &slot_spacing,
  36         GUIFormSpecMenu *fs_menu,
  37         const Options &options,
  38         gui::IGUIFont *font) :
  39         gui::IGUIElement(gui::EGUIET_ELEMENT, env, parent, id, rectangle),
  40         m_invmgr(invmgr),
  41         m_inventoryloc(inventoryloc),
  42         m_listname(listname),
  43         m_geom(geom),
  44         m_start_item_i(start_item_i),
  45         m_slot_size(slot_size),
  46         m_slot_spacing(slot_spacing),
  47         m_fs_menu(fs_menu),
  48         m_options(options),
  49         m_font(font),
  50         m_hovered_i(-1)
  51 {
  52 }
  53
  54 void GUIInventoryList::draw()
  55 {
  56         if (!IsVisible)
  57                 return;
  58
  59         Inventory *inv = m_invmgr->getInventory(m_inventoryloc);
  60         if (!inv) {
  61                 warningstream << "GUIInventoryList::draw(): "
  62                                 << "The inventory location "
  63                                 << "\"" << m_inventoryloc.dump() << "\" doesn't exist anymore"
  64                                 << std::endl;
  65                 return;
  66         }
  67         InventoryList *ilist = inv->getList(m_listname);
  68         if (!ilist) {
  69                 warningstream << "GUIInventoryList::draw(): "
  70                                 << "The inventory list \"" << m_listname << "\" @ \""
  71                                 << m_inventoryloc.dump() << "\" doesn't exist anymore"
  72                                 << std::endl;
  73                 return;
  74         }
  75
  76         video::IVideoDriver *driver = Environment->getVideoDriver();
  77         Client *client = m_fs_menu->getClient();
  78         const ItemSpec *selected_item = m_fs_menu->getSelectedItem();
  79
  80         core::rect<s32> imgrect(0, 0, m_slot_size.X, m_slot_size.Y);
  81         v2s32 base_pos = AbsoluteRect.UpperLeftCorner;
  82
  83         for (s32 i = 0; i < m_geom.X * m_geom.Y; i++) {
  84                 s32 item_i = i + m_start_item_i;
  85                 if (item_i >= (s32)ilist->getSize())
  86                         break;
  87
  88                 v2s32 p((i % m_geom.X) * m_slot_spacing.X,
  89                                 (i / m_geom.X) * m_slot_spacing.Y);
  90                 core::rect<s32> rect = imgrect + base_pos + p;
  91                 ItemStack item = ilist->getItem(item_i);
  92
  93                 bool selected = selected_item
  94                         && m_invmgr->getInventory(selected_item->inventoryloc) == inv
  95                         && selected_item->listname == m_listname
  96                         && selected_item->i == item_i;
  97                 core::rect<s32> clipped_rect(rect);
  98                 clipped_rect.clipAgainst(AbsoluteClippingRect);
  99                 bool hovering = m_hovered_i == item_i;
 100                 ItemRotationKind rotation_kind = selected ? IT_ROT_SELECTED :
 101                         (hovering ? IT_ROT_HOVERED : IT_ROT_NONE);
 102
 103                 // layer 0
 104                 if (hovering) {
 105                         driver->draw2DRectangle(m_options.slotbg_h, rect, &AbsoluteClippingRect);
 106                 } else {
 107                         driver->draw2DRectangle(m_options.slotbg_n, rect, &AbsoluteClippingRect);
 108                 }
 109
 110                 // Draw inv slot borders
 111                 if (m_options.slotborder) {
 112                         s32 x1 = rect.UpperLeftCorner.X;
 113                         s32 y1 = rect.UpperLeftCorner.Y;
 114                         s32 x2 = rect.LowerRightCorner.X;
 115                         s32 y2 = rect.LowerRightCorner.Y;
 116                         s32 border = 1;
 117                         core::rect<s32> clipping_rect = Parent ? Parent->getAbsoluteClippingRect()
 118                                         : core::rect<s32>();
 119                         core::rect<s32> *clipping_rect_ptr = Parent ? &clipping_rect : nullptr;
 120                         driver->draw2DRectangle(m_options.slotbordercolor,
 121                                 core::rect<s32>(v2s32(x1 - border, y1 - border),
 122                                                                 v2s32(x2 + border, y1)), clipping_rect_ptr);
 123                         driver->draw2DRectangle(m_options.slotbordercolor,
 124                                 core::rect<s32>(v2s32(x1 - border, y2),
 125                                                                 v2s32(x2 + border, y2 + border)), clipping_rect_ptr);
 126                         driver->draw2DRectangle(m_options.slotbordercolor,
 127                                 core::rect<s32>(v2s32(x1 - border, y1),
 128                                                                 v2s32(x1, y2)), clipping_rect_ptr);
 129                         driver->draw2DRectangle(m_options.slotbordercolor,
 130                                 core::rect<s32>(v2s32(x2, y1),
 131                                                                 v2s32(x2 + border, y2)), clipping_rect_ptr);
 132                 }
 133
 134                 // layer 1
 135                 if (selected)
 136                         item.takeItem(m_fs_menu->getSelectedAmount());
 137
 138                 if (!item.empty()) {
 139                         // Draw item stack
 140                         drawItemStack(driver, m_font, item, rect, &AbsoluteClippingRect,
 141                                         client, rotation_kind);
 142                         // Add hovering tooltip
 143                         if (hovering && !selected_item) {
 144                                 std::string tooltip = item.getDescription(client->idef());
 145                                 if (m_fs_menu->doTooltipAppendItemname())
 146                                         tooltip += "\n[" + item.name + "]";
 147                                 m_fs_menu->addHoveredItemTooltip(tooltip);
 148                         }
 149                 }
 150         }
 151
 152         IGUIElement::draw();
 153 }
 154
 155 bool GUIInventoryList::OnEvent(const SEvent &event)
 156 {
 157         if (event.EventType != EET_MOUSE_INPUT_EVENT) {
 158                 if (event.EventType == EET_GUI_EVENT &&
 159                                 event.GUIEvent.EventType == EGET_ELEMENT_LEFT) {
 160                         // element is no longer hovered
 161                         m_hovered_i = -1;
 162                 }
 163                 return IGUIElement::OnEvent(event);
 164         }
 165
 166         m_hovered_i = getItemIndexAtPos(v2s32(event.MouseInput.X, event.MouseInput.Y));
 167
 168         if (m_hovered_i != -1)
 169                 return IGUIElement::OnEvent(event);
 170
 171         // no item slot at pos of mouse event => allow clicking through
 172         // find the element that would be hovered if this inventorylist was invisible
 173         bool was_visible = IsVisible;
 174         IsVisible = false;
 175         IGUIElement *hovered =
 176                 Environment->getRootGUIElement()->getElementFromPoint(
 177                         core::position2d<s32>(event.MouseInput.X, event.MouseInput.Y));
 178
 179         bool ret = hovered && hovered->OnEvent(event);
 180
 181         IsVisible = was_visible;
 182
 183         return ret;
 184 }
 185
 186 s32 GUIInventoryList::getItemIndexAtPos(v2s32 p) const
 187 {
 188         if (!IsVisible || AbsoluteClippingRect.getArea() <= 0 ||
 189                         !AbsoluteClippingRect.isPointInside(p))
 190                 return -1;
 191
 192         core::rect<s32> imgrect(0, 0, m_slot_size.X, m_slot_size.Y);
 193         v2s32 base_pos = AbsoluteRect.UpperLeftCorner;
 194
 195         // instead of looping through each slot, we look where p would be in the grid
 196         s32 i = (p.X - base_pos.X) / (s32)m_slot_spacing.X
 197                         + m_geom.X * ((p.Y - base_pos.Y) / (s32)m_slot_spacing.Y);
 198
 199         v2s32 p0((i % m_geom.X) * m_slot_spacing.X,
 200                         (i / m_geom.X) * m_slot_spacing.Y);
 201
 202         core::rect<s32> rect = imgrect + base_pos + p0;
 203
 204         rect.clipAgainst(AbsoluteClippingRect);
 205
 206         if (rect.getArea() > 0 && rect.isPointInside(p))
 207                 return i + m_start_item_i;
 208
 209         return -1;
 210 }