--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/MessageLog.cc Tue Jan 21 02:03:27 2014 +0200
@@ -0,0 +1,139 @@
+/*
+ * LDForge: LDraw parts authoring CAD
+ * Copyright (C) 2013, 2014 Santeri Piippo
+ *
+ * This program 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 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <QTimer>
+#include <QDate>
+#include "MessageLog.h"
+#include "GLRenderer.h"
+#include "MainWindow.h"
+#include "moc_MessageLog.cpp"
+
+static const int g_maxMessages = 5;
+static const int g_expiry = 5;
+static const int g_fadeTime = 500; // msecs
+
+// =============================================================================
+// -----------------------------------------------------------------------------
+MessageManager::MessageManager (QObject* parent) :
+ QObject (parent)
+{
+ m_ticker = new QTimer;
+ m_ticker->start (100);
+ connect (m_ticker, SIGNAL (timeout()), this, SLOT (tick()));
+}
+
+// =============================================================================
+// -----------------------------------------------------------------------------
+MessageManager::Line::Line (QString text) :
+ text (text),
+ alpha (1.0f),
+ expiry (QDateTime::currentDateTime().addSecs (g_expiry)) {}
+
+// =============================================================================
+// Check this line's expiry and update alpha accordingly. Returns true if the
+// line is to still stick around, false if it expired. 'changed' is updated to
+// whether the line has somehow changed since the last update.
+// -----------------------------------------------------------------------------
+bool MessageManager::Line::update (bool& changed)
+{
+ changed = false;
+ QDateTime now = QDateTime::currentDateTime();
+ int msec = now.msecsTo (expiry);
+
+ if (now >= expiry)
+ {
+ // Message line has expired
+ changed = true;
+ return false;
+ }
+
+ if (msec <= g_fadeTime)
+ {
+ // Message line has not expired but is fading out
+ alpha = ( (float) msec) / g_fadeTime;
+ changed = true;
+ }
+
+ return true;
+}
+
+// =============================================================================
+// Add a line to the message manager.
+// -----------------------------------------------------------------------------
+void MessageManager::addLine (QString line)
+{
+ // If there's too many entries, pop the excess out
+ while (m_lines.size() >= g_maxMessages)
+ m_lines.removeFirst();
+
+ m_lines << Line (line);
+
+ // Update the renderer view
+ if (getRenderer())
+ getRenderer()->update();
+}
+
+// =============================================================================
+// Ticks the message manager. All lines are ticked and the renderer scene is
+// redrawn if something changed.
+// -----------------------------------------------------------------------------
+void MessageManager::tick()
+{
+ if (m_lines.isEmpty())
+ return;
+
+ bool changed = false;
+
+ for (int i = 0; i < m_lines.size(); ++i)
+ {
+ bool lineChanged;
+
+ if (!m_lines[i].update (lineChanged))
+ m_lines.removeAt (i--);
+
+ changed |= lineChanged;
+ }
+
+ if (changed && getRenderer())
+ getRenderer()->update();
+}
+
+// =============================================================================
+// -----------------------------------------------------------------------------
+const QList<MessageManager::Line>& MessageManager::getLines() const
+{
+ return m_lines;
+}
+
+// =============================================================================
+// log() interface - format the argument list and add the resulting string to
+// the main message manager.
+// -----------------------------------------------------------------------------
+void DoLog (std::initializer_list<StringFormatArg> args)
+{
+ const QString msg = DoFormat (args);
+
+ for (QString& a : msg.split ("\n", QString::SkipEmptyParts))
+ {
+ if (g_win)
+ g_win->addMessage (a);
+
+ // Also print it to stdout
+ fprint (stdout, "%1\n", a);
+ }
+}