1 files changed, 144 insertions, 0 deletions
diff --git a/src/gwin/gwm.c b/src/gwin/gwm.c
new file mode 100644
index 00000000..5a533c40
--- /dev/null
+++ b/src/gwin/gwm.c
@@ -0,0 +1,144 @@
+/*
+ * This file is subject to the terms of the GFX License. If a copy of
+ * the license was not distributed with this file, you can obtain one at:
+ *
+ *              http://chibios-gfx.com/license.html
+ */
+
+#include "gfx.h"
+
+// Used by the NULL window manager
+#define MIN_WIN_WIDTH	3
+#define MIN_WIN_HEIGHT	3
+
+/*-----------------------------------------------
+ * The default window manager (GNullWindowManager)
+ *-----------------------------------------------*/
+
+#if GFX_USE_GWIN && GWIN_NEED_WINDOWMANAGER
+
+#include "gwin/class_gwin.h"
+
+/*-----------------------------------------------
+ * Data
+ *-----------------------------------------------*/
+
+static void WM_Init(void);
+static void WM_DeInit(void);
+static bool_t WM_Add(GHandle gh, coord_t x, coord_t y, coord_t w, coord_t h);
+static void WM_Delete(GHandle gh);
+static void WM_Visible(GHandle gh);
+static void WM_Redim(GHandle gh, coord_t x, coord_t y, coord_t w, coord_t h);
+static void WM_Raise(GHandle gh);
+static void WM_MinMax(GHandle gh, GWindowMinMax minmax);
+
+static const gwmVMT GNullWindowManagerVMT = {
+	WM_Init,
+	WM_DeInit,
+	WM_Add,
+	WM_Delete,
+	WM_Visible,
+	WM_Redim,
+	WM_Raise,
+	WM_MinMax,
+};
+
+const GWindowManager	GNullWindowManager = {
+	&GNullWindowManagerVMT,
+};
+
+/*-----------------------------------------------
+ * Window Manager Routines
+ *-----------------------------------------------*/
+
+static void WM_Init(void) {
+	// We don't need to do anything here.
+	// A full window manager would move the windows around, add borders etc
+
+	// clear the screen
+	// cycle through the windows already defined displaying them
+	// or cut all the window areas out of the screen and clear the remainder
+}
+
+static void WM_DeInit(void) {
+	// We don't need to do anything here.
+	// A full window manager would remove any borders etc
+}
+
+static bool_t WM_Add(GHandle gh, coord_t x, coord_t y, coord_t w, coord_t h) {
+	// Put it on the queue
+	gfxQueueASyncPut(&_GWINList, &gh->wmq);
+
+	// Make sure the size is valid
+	WM_Redim(gh, x, y, w, h);
+
+	// Display it if it is visible
+	WM_Visible(gh);
+	return TRUE;
+}
+
+static void WM_Delete(GHandle gh) {
+	// A real window manager would make the window invisible
+	//	(and then clear the area underneath)
+
+	// Just remove it from the queue
+	gfxQueueASyncRemove(&_GWINList, &gh->wmq);
+}
+
+static void WM_Visible(GHandle gh) {
+	if ((gh->flags & GWIN_FLG_VISIBLE)) {
+		if (gh->vmt->Redraw) {
+			#if GDISP_NEED_CLIP
+				gdispSetClip(gh->x, gh->y, gh->width, gh->height);
+			#endif
+			gh->vmt->Redraw(gh);
+		} else
+			gwinClear(gh);
+		// A real window manager would also redraw the borders
+	}
+
+	// else
+	// A real window manager would make the window invisible
+	//	(and then clear the area underneath)
+
+}
+
+static void WM_Redim(GHandle gh, coord_t x, coord_t y, coord_t w, coord_t h) {
+	// This is the simplest way of doing it - just clip the the screen
+	// If it won't fit on the screen move it around until it does.
+	if (x < 0) { w += x; x = 0; }
+	if (y < 0) { h += y; y = 0; }
+	if (x > gdispGetWidth()-MIN_WIN_WIDTH)		x = gdispGetWidth()-MIN_WIN_WIDTH;
+	if (y > gdispGetHeight()-MIN_WIN_HEIGHT)	y = gdispGetHeight()-MIN_WIN_HEIGHT;
+	if (w < MIN_WIN_WIDTH) { w = MIN_WIN_WIDTH; }
+	if (h < MIN_WIN_HEIGHT) { h = MIN_WIN_HEIGHT; }
+	if (x+w > gdispGetWidth()) w = gdispGetWidth() - x;
+	if (y+h > gdispGetHeight()) h = gdispGetHeight() - y;
+	gh->x = x; gh->y = y;
+	gh->width = w; gh->height = h;
+}
+
+static void WM_MinMax(GHandle gh, GWindowMinMax minmax) {
+	(void)gh; (void) minmax;
+	// We don't support minimising, maximising or restoring
+}
+
+static void WM_Raise(GHandle gh) {
+	// Take it off the list and then put it back on top
+	// The order of the list then reflects the z-order.
+	gfxQueueASyncRemove(&_GWINList, &gh->wmq);
+	gfxQueueASyncPut(&_GWINList, &gh->wmq);
+
+	// Redraw the window
+	if ((gh->flags & GWIN_FLG_VISIBLE)) {
+		if (gh->vmt->Redraw) {
+			#if GDISP_NEED_CLIP
+				gdispSetClip(gh->x, gh->y, gh->width, gh->height);
+			#endif
+			gh->vmt->Redraw(gh);
+		}
+	}
+}
+
+#endif /* GFX_USE_GWIN && GWIN_NEED_WINDOWMANAGER */
+/** @} */