Altered process so that cost only appears on spell purchase window.

Added myself to authors

CHANGELOG.md

@@ -179,6 +179,7 @@
     Feature #5131: Custom skeleton bones
     Feature #5132: Unique animations for different weapon types
     Feature #5146: Safe Dispose corpse
+    Feature #5147: Show spell magicka cost in spell buying window
     Task #4686: Upgrade media decoder to a more current FFmpeg API
     Task #4695: Optimize Distant Terrain memory consumption
     Task #4789: Optimize cell transitions

apps/openmw/mwgui/spellbuyingwindow.cpp

@@ -70,6 +70,7 @@ namespace MWGui
         toAdd->eventMouseWheel += MyGUI::newDelegate(this, &SpellBuyingWindow::onMouseWheel);
         toAdd->setUserString("ToolTipType", "Spell");
         toAdd->setUserString("Spell", spell.mId);
+        toAdd->setUserString("SpellCost", std::to_string(spell.mData.mCost));
         toAdd->eventMouseButtonClick += MyGUI::newDelegate(this, &SpellBuyingWindow::onSpellButtonClick);
         mSpellsWidgetMap.insert(std::make_pair (toAdd, spell.mId));
     }

apps/openmw/mwgui/tooltips.cpp

@@ -249,6 +249,9 @@ namespace MWGui
                         int school = MWMechanics::getSpellSchool(spell, player);
                         info.text = "#{sSchool}: " + sSchoolNames[school];
                     }
+                    std::string cost = focus->getUserString("SpellCost");
+                    if (cost != "" && cost != "0")
+                        info.text += MWGui::ToolTips::getValueString(spell->mData.mCost, "#{sCastCost}");
                     info.effects = effects;
                     tooltipSize = createToolTip(info);
                 }