Add Qt4 windowport

Originally by Ray Chason for 3.4.3, based on the Qt windowport by
Warwick Allison. The look and feel is mostly the same.

Some improvements over the Qt 3 interface are:

* Panes are resizable
* Full support for IBMgraphics, and walls and corridors are drawn with
  graphical primitives for a continuous appearance no matter what the font
  says
* Lots of irritating glitches fixed
* Menus support proportional fonts correctly

Adding this because the old Qt windowport cannot be compiled on Qt4,
even with Qt3 compatibility stuff.

TODO:
 - background map glyphs
 - status hilites
 - menucolors

win/Qt4/qt4icon.h

@@ -0,0 +1,53 @@
+// Copyright (c) Warwick Allison, 1999.
+// Qt4 conversion copyright (c) Ray Chason, 2012-2014.
+// NetHack may be freely redistributed.  See license for details.
+
+// qt4icon.cpp -- a labelled icon
+
+#ifndef QT4ICON_H
+#define QT4ICON_H
+
+namespace nethack_qt4 {
+
+class NetHackQtLabelledIcon : public QWidget {
+public:
+	NetHackQtLabelledIcon(QWidget* parent, const char* label);
+	NetHackQtLabelledIcon(QWidget* parent, const char* label, const QPixmap& icon);
+
+	enum { NoNum=-99999 };
+	void setLabel(const QString&, bool lower=true); // a string
+	void setLabel(const QString&, long, const QString& tail=""); // a number
+	void setLabel(const QString&, long show_value, long comparative_value, const QString& tail="");
+	void setIcon(const QPixmap&);
+	virtual void setFont(const QFont&);
+
+	void highlightWhenChanging();
+	void lowIsGood();
+	void dissipateHighlight();
+
+	virtual void show();
+	virtual QSize sizeHint() const;
+	virtual QSize minimumSizeHint() const;
+
+protected:
+	void resizeEvent(QResizeEvent*);
+
+private:
+	void initHighlight();
+	void setAlignments();
+	void highlight(const QString& highlight);
+	void unhighlight();
+
+	bool low_is_good;
+	int prev_value;
+	int turn_count;		/* last time the value changed */
+	QString hl_good;
+	QString hl_bad;
+
+	QLabel* label;
+	QLabel* icon;
+};
+
+} // namespace nethack_qt4
+
+#endif