From 4e6368d019e2543e6bf792f182486732d6f5a3f5 Mon Sep 17 00:00:00 2001
From: David Robillard <d@drobilla.net>
Date: Sun, 29 Apr 2012 02:53:47 +0000
Subject: Proper key press and release support on X11. Clearer mouse callback
 API.

---
 pugl/pugl.h       |  2 +-
 pugl/pugl_win.cpp |  4 ++--
 pugl/pugl_x11.c   | 27 ++++++++++++++++++++++++---
 pugl_test.c       |  6 ++++--
 4 files changed, 31 insertions(+), 8 deletions(-)

diff --git a/pugl/pugl.h b/pugl/pugl.h
index 853a754..6a6fbe7 100644
--- a/pugl/pugl.h
+++ b/pugl/pugl.h
@@ -52,7 +52,7 @@ typedef void (*PuglDisplayFunc)(PuglWindow* handle);
 typedef void (*PuglKeyboardFunc)(PuglWindow* handle, bool press, uint32_t key);
 typedef void (*PuglMotionFunc)(PuglWindow* handle, int x, int y);
 typedef void (*PuglMouseFunc)(PuglWindow* handle,
-                              int button, int state,
+                              int button, bool down,
                               int x, int y);
 typedef void (*PuglReshapeFunc)(PuglWindow* handle, int width, int height);
 
diff --git a/pugl/pugl_win.cpp b/pugl/pugl_win.cpp
index a27a2c5..50f42f0 100644
--- a/pugl/pugl_win.cpp
+++ b/pugl/pugl_win.cpp
@@ -104,10 +104,10 @@ puglDisplay(PuglWindow* win)
 }
 
 static void
-processMouseEvent(PuglWindow* win, int button, bool down, LPARAM lParam)
+processMouseEvent(PuglWindow* win, int button, bool press, LPARAM lParam)
 {
 	if (win->mouseFunc) {
-		win->mouseFunc(win, button, down,
+		win->mouseFunc(win, button, press,
 		               GET_X_LPARAM(lParam),
 		               GET_Y_LPARAM(lParam));
 	}
diff --git a/pugl/pugl_x11.c b/pugl/pugl_x11.c
index 33f0b42..5844f2d 100644
--- a/pugl/pugl_x11.c
+++ b/pugl/pugl_x11.c
@@ -104,7 +104,8 @@ puglCreate(PuglNativeWindow parent, const char* title, int width, int height)
 	attr.border_pixel = 0;
 
 	attr.event_mask = ExposureMask | KeyPressMask | KeyReleaseMask
-		| ButtonPressMask | PointerMotionMask | StructureNotifyMask;
+		| ButtonPressMask | ButtonReleaseMask
+		| PointerMotionMask | StructureNotifyMask;
 
 	impl->win = XCreateWindow(
 		impl->display, xParent,
@@ -194,20 +195,40 @@ puglProcessEvents(PuglWindow* win)
 			}
 			break;
 		case ButtonPress:
+		case ButtonRelease:
 			if (win->mouseFunc) {
 				win->mouseFunc(win,
-				               event.xbutton.button, event.xbutton.state,
+				               event.xbutton.button, event.type == ButtonPress,
 				               event.xbutton.x, event.xbutton.y);
 			}
 			break;
 		case KeyPress:
-		case KeyRelease:
 			if (win->keyboardFunc) {
 				KeySym sym = XKeycodeToKeysym(
 					win->impl->display, event.xkey.keycode, 0);
 				win->keyboardFunc(win, event.type == KeyPress, sym);
 			}
 			break;
+		case KeyRelease: {
+			bool retriggered = false;
+			if (XEventsQueued(win->impl->display, QueuedAfterReading)) {
+				XEvent next;
+				XPeekEvent(win->impl->display, &next);
+				if (next.type == KeyPress &&
+				    next.xkey.time == event.xkey.time &&
+				    next.xkey.keycode == event.xkey.keycode) {
+					// Key repeat, ignore fake KeyPress event
+					XNextEvent(win->impl->display, &event);
+					retriggered = true;
+				}
+			}
+
+			if (!retriggered && win->keyboardFunc) {
+				KeySym sym = XKeycodeToKeysym(
+					win->impl->display, event.xkey.keycode, 0);
+				win->keyboardFunc(win, false, sym);
+			}
+		}
 		case ClientMessage:
 			if (!strcmp(XGetAtomName(win->impl->display,
 			                         event.xclient.message_type),
diff --git a/pugl_test.c b/pugl_test.c
index f6d9ac2..63bc7d6 100644
--- a/pugl_test.c
+++ b/pugl_test.c
@@ -59,6 +59,7 @@ onDisplay(PuglWindow* win)
 static void
 onKeyboard(PuglWindow* win, bool press, uint32_t key)
 {
+	fprintf(stderr, "Key %c %s\n", (char)key, press ? "down" : "up");
 	if (key == 'q' || key == 'Q' || key == KEY_ESCAPE) {
 		quit = 1;
 	}
@@ -73,9 +74,10 @@ onMotion(PuglWindow* win, int x, int y)
 }
 
 static void
-onMouse(PuglWindow* handle, int button, int state, int x, int y)
+onMouse(PuglWindow* handle, int button, bool press, int x, int y)
 {
-	fprintf(stderr, "Mouse %d at %d,%d\n", button, x, y);
+	fprintf(stderr, "Mouse %d %s at %d,%d\n",
+	        button, press ? "down" : "up", x, y);
 }
 
 static void
-- 
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