1 files changed, 52 insertions, 0 deletions
diff --git a/Src/Wasabi/api/wnd/paintcb.cpp b/Src/Wasabi/api/wnd/paintcb.cpp
new file mode 100644
index 00000000..974ba998
--- /dev/null
+++ b/Src/Wasabi/api/wnd/paintcb.cpp
@@ -0,0 +1,52 @@
+#include "precomp.h"
+#include "paintcb.h"
+#include "api_window.h"
+
+#define CBCLASS PaintCallbackInfoI
+START_DISPATCH;
+  CB(PAINTCBINFO_GETCANVAS, getCanvas);
+  CB(PAINTCBINFO_GETREGION, getRegion);
+END_DISPATCH;
+
+PaintCallback::PaintCallback(ifc_window *w) {
+  monitorWindow(w);
+}
+
+PaintCallback::~PaintCallback() {
+  if (wnd != NULL) viewer_delViewItem(wnd);
+}
+
+void PaintCallback::monitorWindow(ifc_window *w) {
+  if (wnd != NULL) {
+    viewer_delViewItem(wnd);
+    wnd = NULL;
+  }
+  if (w != NULL) {
+    viewer_addViewItem(w);
+    wnd = w;
+  }
+}
+
+int PaintCallback::viewer_onItemDeleted(ifc_window *item) {
+  ASSERT(item == wnd);//jic
+  onWindowDeleted(wnd);
+  wnd = NULL;
+  return 1;
+}
+
+int PaintCallback::viewer_onEvent(ifc_window *item, int event, intptr_t param, void *ptr, size_t ptrlen) {
+  PaintCallbackInfo *info = reinterpret_cast<PaintCallbackInfo *>(ptr);
+  switch (event) {
+    case ifc_window::Event_ONPAINT:
+      if (param == BEFOREPAINT)
+        onBeforePaint(info);
+      else
+        onAfterPaint(info);
+    break;
+    case ifc_window::Event_ONINVALIDATE:
+      onInvalidation(info);
+    break;
+  }
+  return 1;
+}
+