Add function to query mouse buttons.

2 files changed, 29 insertions, 2 deletions

diff --git a/app/include/gfx/app.h b/app/include/gfx/app.h
index 3843d92..77b6ad2 100644
--- a/app/include/gfx/app.h
+++ b/app/include/gfx/app.h
@@ -31,6 +31,12 @@ typedef struct GfxAppCallbacks {
   GfxAppResize   resize;
 } GfxAppCallbacks;
 
+typedef enum MouseButton {
+  LMB,
+  RMB,
+  MMB,
+} MouseButton;
+
 typedef enum Key {
   KeyA = 'a',
   KeyB,
@@ -70,8 +76,11 @@ bool gfx_app_run(const GfxAppDesc*, const GfxAppCallbacks*);
 /// Get the mouse coordinates relative to the app's window.
 void gfx_app_get_mouse_position(double* x, double* y);
 
+/// Return if the given mouse button is pressed.
+bool gfx_app_is_mouse_button_pressed(MouseButton);
+
 /// Return true if the given key is pressed.
-bool gfx_is_key_pressed(Key);
+bool gfx_app_is_key_pressed(Key);
 
 #ifdef __cplusplus
 } // extern "C"
diff --git a/app/src/app.c b/app/src/app.c
index 1e636af..9b816ee 100644
--- a/app/src/app.c
+++ b/app/src/app.c
@@ -149,12 +149,30 @@ void gfx_app_get_mouse_position(double* x, double* y) {
   glfwGetCursorPos(g_gfx_app.window, x, y);
 }
 
+static int to_glfw_mouse_button(MouseButton button);
+
+bool gfx_app_is_mouse_button_pressed(MouseButton button) {
+  return glfwGetMouseButton(g_gfx_app.window, to_glfw_mouse_button(button)) ==
+         GLFW_PRESS;
+}
+
 static int to_glfw_key(Key key);
 
-bool gfx_is_key_pressed(Key key) {
+bool gfx_app_is_key_pressed(Key key) {
   return glfwGetKey(g_gfx_app.window, to_glfw_key(key)) == GLFW_PRESS;
 }
 
+static int to_glfw_mouse_button(MouseButton button) {
+  switch (button) {
+  case LMB:
+    return GLFW_MOUSE_BUTTON_LEFT;
+  case RMB:
+    return GLFW_MOUSE_BUTTON_RIGHT;
+  case MMB:
+    return GLFW_MOUSE_BUTTON_MIDDLE;
+  }
+}
+
 static int to_glfw_key(Key key) {
   switch (key) {
   case KeyA: