From 5e63328f3bcd8b1d1cc7d59350f92cc4185df7c0 Mon Sep 17 00:00:00 2001
From: dos-reis <gdr@axiomatics.org>
Date: Fri, 1 Jul 2011 17:26:12 +0000
Subject: 	* gui/conversation.h (OutputTextArea): Now inherit from 
 QTextEditor, for the nth time. 	(OutputTextArea::sizeHint): Declare as
 override. 	* gui/conversation.cc (OutputTextArea::OutputTextArea): Make
 the 	output text editor read only.  Disallow vertical scroll bars. 
 (OutputTextArea::sizeHint): Give a tight estimate. 
 (OutputTextArea::add_paragraph): Tidy. 	(OutputTextArea::add_text):
 Likewise. 	(Exchange::reply_to_query): Toggle the mouse in busy state 
 after submitting query. 	(Conversation::read_reply): Untoggle mouse'
 busy state if last 	output text was read.

---
 src/gui/conversation.cc | 26 +++++++++++++++++++++++---
 1 file changed, 23 insertions(+), 3 deletions(-)

(limited to 'src/gui/conversation.cc')

diff --git a/src/gui/conversation.cc b/src/gui/conversation.cc
index 0293b494..c3357e0f 100644
--- a/src/gui/conversation.cc
+++ b/src/gui/conversation.cc
@@ -35,6 +35,7 @@
 #include <iostream>
 
 #include <QScrollBar>
+#include <QApplication>
 #include "conversation.h"
 #include "debate.h"
 
@@ -64,11 +65,27 @@ namespace OpenAxiom {
    // --------------------
    OutputTextArea::OutputTextArea(QWidget* p)
          : Base(p) {
+      setReadOnly(true);          // this is a output only area.
+      setLineWrapMode(NoWrap);    // for the time being, mess with nothing.
       setFont(p->font());
+      setViewportMargins(0, 0, 0, 0);
       setSizePolicy(QSizePolicy::Preferred, QSizePolicy::MinimumExpanding);
+      // We do not want to see scroll bars.  Usually disallowing vertical
+      // scroll bars and allocating enough horizontal space is sufficient
+      // to ensure that we don't see any horizontal scrollbar.
+      setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
       setLineWidth(1);
    }
 
+   // This overriding implementation is so that we can control the
+   // amount of vertical space in the read-only editor viewport allocated
+   // for the display of output text.  In particular we do not want
+   // scrollbars.
+   QSize
+   OutputTextArea::sizeHint() const {
+      return QSize(width(), document()->lineCount() * fontMetrics().height());
+   }
+
    // Concatenate two paragraphs.
    static QString
    accumulate_paragaphs(const QString& before, const QString& after) {
@@ -78,7 +95,7 @@ namespace OpenAxiom {
    }
    
    void OutputTextArea::add_paragraph(const QString& s) {
-      setText(accumulate_paragaphs(text(), s));
+      setPlainText(accumulate_paragaphs(toPlainText(), s));
       QSize sz = sizeHint();
       sz.setWidth(parentWidget()->width() - our_margin(this));
       resize(sz);
@@ -87,7 +104,7 @@ namespace OpenAxiom {
    }
 
    void OutputTextArea::add_text(const QString& s) {
-      setText(text() + s);
+      setPlainText(toPlainText() + s);
       QSize sz = sizeHint();
       const int w = parentWidget()->width() - 2 * frameWidth();
       if (w > sz.width())
@@ -228,6 +245,7 @@ namespace OpenAxiom {
       if (empty_string(input))
          return;
       topic()->submit_query(input);
+      QApplication::setOverrideCursor(QCursor(Qt::WaitCursor));
    }
 
    void Exchange::resizeEvent(QResizeEvent* e) {
@@ -393,8 +411,10 @@ namespace OpenAxiom {
          exchange()->updateGeometry();
          if (empty_string(output.prompt))
             ensure_visibility(debate(), exchange());
-         else
+         else {
             ensure_visibility(debate(), next(exchange()));
+            QApplication::restoreOverrideCursor();
+	 }
       }
    }
 
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