1 files changed, 126 insertions, 0 deletions
diff --git a/unix/tx/TXLabel.h b/unix/tx/TXLabel.h
new file mode 100644
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+++ b/unix/tx/TXLabel.h
@@ -0,0 +1,126 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+//
+// TXLabel.h
+//
+// An TXLabel allows you to put up multiline text in a window with various
+// alignments.  The label must be big enough to contain the text - if not then
+// it will be resized appropriately.
+//
+
+#ifndef __TXLABEL_H__
+#define __TXLABEL_H__
+
+#include <stdlib.h>
+#include "TXWindow.h"
+#include <rfb/util.h>
+
+class TXLabel : public TXWindow, public TXEventHandler {
+public:
+  enum HAlign { left, centre, right };
+  enum VAlign { top, middle, bottom };
+
+  TXLabel(Display* dpy_, const char* text_, TXWindow* parent_=0,
+          int w=1, int h=1, HAlign ha=centre, VAlign va=middle)
+    : TXWindow(dpy_, w, h, parent_), lineSpacing(2), lines(0),
+      halign(ha), valign(va)
+  {
+    setEventHandler(this);
+    setText(text_);
+    addEventMask(ExposureMask);
+  }
+
+  // setText() changes the text in the label.
+  void setText(const char* text_) {
+    text.buf = rfb::strDup(text_);
+    lines = 0;
+    int lineStart = 0;
+    int textWidth = 0;
+    int i = -1;
+    do {
+      i++;
+      if (text.buf[i] == '\n' || text.buf[i] == 0) {
+        int tw = XTextWidth(defaultFS, &text.buf[lineStart], i-lineStart);
+        if (tw > textWidth) textWidth = tw;
+        lineStart = i+1;
+        lines++;
+      }
+    } while (text.buf[i] != 0);
+    int textHeight = ((defaultFS->ascent + defaultFS->descent + lineSpacing)
+                      * lines);
+    int newWidth = __rfbmax(width(), textWidth + xPad*2);
+    int newHeight = __rfbmax(height(), textHeight + yPad*2);
+    if (width() < newWidth || height() < newHeight) {
+      resize(newWidth, newHeight);
+    }
+    invalidate();
+  }
+
+private:
+  int xOffset(int textWidth) {
+    switch (halign) {
+    case left:  return xPad;
+    case right: return width() - xPad - textWidth;
+    default:    return (width() - textWidth) / 2;
+    }
+  }
+
+  int yOffset(int lineNum) {
+    int textHeight = ((defaultFS->ascent + defaultFS->descent + lineSpacing)
+                      * lines);
+    int lineOffset = ((defaultFS->ascent + defaultFS->descent + lineSpacing)
+                      * lineNum + defaultFS->ascent);
+    switch (valign) {
+    case top:    return yPad + lineOffset;
+    case bottom: return height() - yPad - textHeight + lineOffset;
+    default:     return (height() - textHeight) / 2 + lineOffset;
+    }
+  }
+
+  void paint() {
+    int lineNum = 0;
+    int lineStart = 0;
+    int i = -1;
+    do {
+      i++;
+      if (text.buf[i] == '\n' || text.buf[i] == 0) {
+        int tw = XTextWidth(defaultFS, &text.buf[lineStart], i-lineStart);
+        XDrawString(dpy, win(), defaultGC, xOffset(tw), yOffset(lineNum),
+                    &text.buf[lineStart], i-lineStart);
+        lineStart = i+1;
+        lineNum++;
+      }
+    } while (text.buf[i] != 0);
+  }
+
+  virtual void handleEvent(TXWindow* w, XEvent* ev) {
+    switch (ev->type) {
+    case Expose:
+      paint();
+      break;
+    }
+  }
+
+  int lineSpacing;
+  rfb::CharArray text;
+  int lines;
+  HAlign halign;
+  VAlign valign;
+};
+
+#endif