From 4a03d938451763dfb95b534f9002865e72ea7ec5 Mon Sep 17 00:00:00 2001
From: Kelly Rauchenberger <fefferburbia@gmail.com>
Date: Sat, 16 Mar 2019 17:45:16 -0400
Subject: Can click to place tiles in editor now

---
 src/consts.h    |  7 +++++++
 src/editor.cpp  | 39 +++++++++++++++++++++++++++++++++++++--
 src/input.h     | 45 +++++++++++++++++++++++++++++++++++++++++++--
 src/rectangle.h | 36 ++++++++++++++++++++++++++++++++++++
 src/vector.h    | 18 ++++++++++++++++++
 5 files changed, 141 insertions(+), 4 deletions(-)
 create mode 100644 src/rectangle.h

diff --git a/src/consts.h b/src/consts.h
index a6b5094..4e33922 100644
--- a/src/consts.h
+++ b/src/consts.h
@@ -2,6 +2,7 @@
 #define CONSTS_H_8019F1B3
 
 #include "vector.h"
+#include "rectangle.h"
 
 constexpr vec2s TILE_SIZE { 32, 32 };
 constexpr vec2s MAP_SIZE { 16, 16 };
@@ -9,4 +10,10 @@ constexpr vec2s LEVEL_SIZE = TILE_SIZE * MAP_SIZE;
 constexpr vec2s BORDER_SIZE = TILE_SIZE;
 constexpr vec2s WINDOW_SIZE = LEVEL_SIZE * vec2s { 2, 1 } + BORDER_SIZE * 2;
 
+constexpr rect4s EDITOR_MAP_AREA { BORDER_SIZE, LEVEL_SIZE };
+constexpr rect4s EDITOR_TILESET_AREA {
+  { BORDER_SIZE.w() * 2 + LEVEL_SIZE.w(), BORDER_SIZE.h() },
+  { TILE_SIZE.w(), LEVEL_SIZE.h() }
+};
+
 #endif /* end of include guard: CONSTS_H_8019F1B3 */
diff --git a/src/editor.cpp b/src/editor.cpp
index 30dde45..8ca850a 100644
--- a/src/editor.cpp
+++ b/src/editor.cpp
@@ -63,7 +63,7 @@ void Editor::tick(
   }
 
   // Check for keypress changes since the last tick.
-  input_.tick(keystate);
+  input_.tick();
 
   if (input_.wasPressed(SDL_SCANCODE_Z))
   {
@@ -130,10 +130,45 @@ void Editor::tick(
     mapFocus_ = !mapFocus_;
   }
 
+  bool newlyTabbed = false;
+
+  if (input_.wasClicked(SDL_BUTTON_LEFT))
+  {
+    if (EDITOR_MAP_AREA.contains(input_.getMousePos()))
+    {
+      if (!mapFocus_)
+      {
+        newlyTabbed = true;
+      }
+
+      mapFocus_ = true;
+    } else if (EDITOR_TILESET_AREA.contains(input_.getMousePos()))
+    {
+      if (mapFocus_)
+      {
+        newlyTabbed = true;
+      }
+
+      mapFocus_ = false;
+
+      selectedTile_ =
+        (input_.getMousePos() - EDITOR_TILESET_AREA.pos).y() / TILE_SIZE.h();
+    }
+  }
+
   if (mapFocus_)
   {
+    if (EDITOR_MAP_AREA.contains(input_.getMousePos()) &&
+        ( input_.hasMouseMoved() || newlyTabbed ))
+    {
+      cursor_ = (input_.getMousePos() - EDITOR_MAP_AREA.pos) / TILE_SIZE;
+    }
+
     if (keystate[SDL_SCANCODE_RETURN] ||
-        keystate[SDL_SCANCODE_SPACE])
+        keystate[SDL_SCANCODE_SPACE] ||
+        ( input_.isClicked(SDL_BUTTON_LEFT) &&
+          EDITOR_MAP_AREA.contains(input_.getMousePos()) &&
+          !newlyTabbed ))
     {
       level_.at(cursor_.x(), cursor_.y(), layer_) = selectedTile_;
 
diff --git a/src/input.h b/src/input.h
index ad8b761..9f6ff47 100644
--- a/src/input.h
+++ b/src/input.h
@@ -5,7 +5,7 @@
 #include <vector>
 
 /**
- * Helper class that detects when a key is newly pressed.
+ * Helper class that detects when a key or mouse button is newly pressed.
  */
 class Input {
 public:
@@ -16,12 +16,22 @@ public:
 
     curstate_.assign(s, s + length_);
     prevstate_ = curstate_;
+
+    prevmouse_ = SDL_GetMouseState(&mousePos_.x(), &mousePos_.y());
+    prevMousePos_ = mousePos_;
+    curmouse_ = prevmouse_;
   }
 
-  void tick(const Uint8* keystate)
+  void tick()
   {
+    const Uint8* keystate = SDL_GetKeyboardState(nullptr);
+
     prevstate_ = std::move(curstate_);
     curstate_.assign(keystate, keystate + length_);
+
+    prevmouse_ = curmouse_;
+    prevMousePos_ = mousePos_;
+    curmouse_ = SDL_GetMouseState(&mousePos_.x(), &mousePos_.y());
   }
 
   bool wasPressed(int scancode) const
@@ -29,11 +39,42 @@ public:
     return curstate_.at(scancode) && !prevstate_.at(scancode);
   }
 
+  bool wasClicked(Uint32 mask) const
+  {
+    return (curmouse_ & SDL_BUTTON(mask)) && !(prevmouse_ & SDL_BUTTON(mask));
+  }
+
+  bool wasReleased(Uint32 mask) const
+  {
+    return !(curmouse_ & SDL_BUTTON(mask)) && (prevmouse_ & SDL_BUTTON(mask));
+  }
+
+  bool isClicked(Uint32 mask) const
+  {
+    return curmouse_ & SDL_BUTTON(mask);
+  }
+
+  const vec2i& getMousePos() const
+  {
+    return mousePos_;
+  }
+
+  bool hasMouseMoved() const
+  {
+    return mousePos_ != prevMousePos_;
+  }
+
 private:
 
   int length_;
   std::vector<Uint8> curstate_;
   std::vector<Uint8> prevstate_;
+
+  Uint32 curmouse_;
+  Uint32 prevmouse_;
+
+  vec2i mousePos_;
+  vec2i prevMousePos_;
 };
 
 #endif /* end of include guard: INPUT_H_0FB34C42 */
diff --git a/src/rectangle.h b/src/rectangle.h
new file mode 100644
index 0000000..7815b56
--- /dev/null
+++ b/src/rectangle.h
@@ -0,0 +1,36 @@
+#ifndef RECTANGLE_H_23049366
+#define RECTANGLE_H_23049366
+
+#include "vector.h"
+
+template <typename T>
+class rect {
+public:
+
+  using vector_type = vec2<T>;
+
+  constexpr rect(
+    vector_type pos,
+    vector_type size) :
+      pos(pos),
+      size(size)
+  {
+  }
+
+  const vector_type pos;
+  const vector_type size;
+
+  bool contains(vector_type point) const
+  {
+    return (
+      point.x() >= pos.x() &&
+      point.x() < pos.x() + size.w() &&
+      point.y() >= pos.y() &&
+      point.y() < pos.y() + size.h());
+  }
+
+};
+
+using rect4s = rect<size_t>;
+
+#endif /* end of include guard: RECTANGLE_H_23049366 */
diff --git a/src/vector.h b/src/vector.h
index c207dc8..ed20936 100644
--- a/src/vector.h
+++ b/src/vector.h
@@ -112,11 +112,29 @@ public:
     return vec2(x() * other.x(), y() * other.y());
   }
 
+  vec2& operator/=(T s)
+  {
+    x() /= s;
+    y() /= s;
+
+    return *this;
+  }
+
+  constexpr vec2 operator/(const vec2& other) const
+  {
+    return vec2(x() / other.x(), y() / other.y());
+  }
+
   constexpr bool operator==(const vec2& other) const
   {
     return (x() == other.x()) && (y() == other.y());
   }
 
+  constexpr bool operator!=(const vec2& other) const
+  {
+    return !(*this == other);
+  }
+
 };
 
 using vec2s = vec2<size_t>;
-- 
cgit 1.4.1