fix win32 platform timers; fix crash in editors; improve logger widget

src/dlangui/platforms/common/platform.d

@@ -849,15 +849,21 @@ class Window {
 
     /// system timer interval expired - notify queue
     protected void onTimer() {
+		//Log.d("window.onTimer");
         bool res = _timerQueue.notify();
+		//Log.d("window.onTimer after notify");
         if (res) {
             // check if update needed and redraw if so
+			//Log.d("before update");
             update(false);
+			//Log.d("after update");
         }
+		//Log.d("schedule next timer");
         long nextInterval = _timerQueue.nextIntervalMillis();
         if (nextInterval > 0) {
             scheduleSystemTimer(nextInterval);
         }
+		//Log.d("schedule next timer done");
     }
 
     /// set timer for destination widget - destination.onTimer() will be called after interval expiration; returns timer id

src/dlangui/platforms/windows/winapp.d

@@ -319,7 +319,7 @@ class Win32Window : Window {
     }
 
     private long _nextExpectedTimerTs;
-    private UINT_PTR _timerId;
+    private UINT_PTR _timerId = 1;
 
     /// schedule timer for interval in milliseconds - call window.onTimer when finished
     override protected void scheduleSystemTimer(long intervalMillis) {
@@ -329,14 +329,21 @@ class Win32Window : Window {
         if (_timerId && _nextExpectedTimerTs && _nextExpectedTimerTs < nextts + 10)
             return; // don't reschedule timer, timer event will be received soon
         if (_hwnd) {
-            _timerId = SetTimer(_hwnd, _timerId, cast(uint)intervalMillis, null);
+			//_timerId = 
+            SetTimer(_hwnd, _timerId, cast(uint)intervalMillis, null);
             _nextExpectedTimerTs = nextts;
         }
     }
 
     void handleTimer(UINT_PTR timerId) {
+		//Log.d("handleTimer id=", timerId);
+		if (timerId == _timerId) {
+			KillTimer(_hwnd, timerId);
+			//_timerId = 0;
+			_nextExpectedTimerTs = 0;
 			onTimer();
 		}
+    }
 
 
     Win32ColorDrawBuf getDrawBuf() {

src/dlangui/widgets/editors.d

@@ -681,6 +681,7 @@ class EditableContent {
         // update highlight if necessary
         updateTokenProps(rangeAfter.start.line, rangeAfter.end.line + 1);
         // call listeners
+		if (contentChangeListeners.assigned)
 			contentChangeListeners(this, op, rangeBefore, rangeAfter, source);
 	}
 
@@ -2405,6 +2406,13 @@ class EditBox : EditWidgetBase {
         FontRef font = font();
         _lineHeight = font.height;
         _numVisibleLines = (_clientRect.height + _lineHeight - 1) / _lineHeight;
+		if (_firstVisibleLine >= _content.length) {
+			_firstVisibleLine = _content.length - _numVisibleLines + 1;
+			if (_firstVisibleLine < 0)
+				_firstVisibleLine = 0;
+			_caretPos.line = _content.length - 1;
+			_caretPos.pos = 0;
+		}
         if (_firstVisibleLine + _numVisibleLines > _content.length)
             _numVisibleLines = _content.length - _firstVisibleLine;
         _visibleLines.length = _numVisibleLines;
@@ -2942,13 +2950,15 @@ class LogWidget : EditBox {
         super(ID);
         _scrollLock = true;
         enabled = false;
-        fontSize = 12;
+        fontSize = 15;
 		fontFace = "Consolas,Lucida Console,Courier New";
 		fontFamily = FontFamily.MonoSpace;
     }
     /// append lines to the end of text
     void appendLines(dstring[] lines...) {
-        lines ~= ""d; // append new line after last line
+		if (lines.length == 0)
+			return;
+        //lines ~= ""d; // append new line after last line
         content.appendLines(lines);
         if (_maxLines > 0 && lineCount > _maxLines) {
             TextRange range;