added ElidedLabel to be used in places where labels might be too long and therefore trigger an unwanted window resize. This is currently used as forum thread titles (Patch from Phenom)

git-svn-id: http://svn.code.sf.net/p/retroshare/code/trunk@7045 b45a01b8-16f6-495d-af2f-9b41ad6348cc

retroshare-gui/src/gui/ForumsDialog.cpp

@@ -140,6 +140,9 @@ ForumsDialog::ForumsDialog(QWidget *parent)
 
     connect(NotifyQt::getInstance(), SIGNAL(forumMsgReadSatusChanged(QString,QString,int)), this, SLOT(forumMsgReadSatusChanged(QString,QString,int)));
 
+	connect(ui.threadTitle, SIGNAL(elisionChanged(bool)), this, SLOT(threadTitle_elisionChanged(bool)));
+
+
     ui.imageBlockWidget->addButtonAction(tr("Load images always for this message"), this, SLOT(loadImagesAlways()), true);
     ui.postText->setImageBlockWidget(ui.imageBlockWidget);
 
@@ -2139,3 +2142,9 @@ void ForumsDialog::loadImagesAlways()
 
     rsForums->setMessageStatus(mCurrForumId, mCurrThreadId, FORUM_MSG_STATUS_LOAD_EMBEDDED_IMAGES, FORUM_MSG_STATUS_LOAD_EMBEDDED_IMAGES);
 }
+
+void ForumsDialog::threadTitle_elisionChanged(bool elided)
+{
+	ui.threadTitle->setToolTip(elided?ui.threadTitle->text():"");
+}
+

retroshare-gui/src/gui/ForumsDialog.h

@@ -129,6 +129,7 @@ private slots:
     void shareKey();
 
     void loadImagesAlways();
+		void threadTitle_elisionChanged(bool elided);
 
 private:
     void insertForums();

retroshare-gui/src/gui/ForumsDialog.ui

@@ -381,7 +381,7 @@
            </widget>
           </item>
           <item row="0" column="2">
-           <widget class="QLabel" name="threadTitle">
+           <widget class="ElidedLabel" name="threadTitle">
             <property name="font">
              <font>
               <pointsize>10</pointsize>
@@ -610,6 +610,11 @@
    <class>LineEditClear</class>
    <extends>QLineEdit</extends>
    <header location="global">gui/common/LineEditClear.h</header>
+</customwidget>
+<customwidget>
+	<class>ElidedLabel</class>
+	<extends>QLabel</extends>
+	<header location="global">gui/common/ElidedLabel.h</header>
 </customwidget>
  </customwidgets>
  <resources>

retroshare-gui/src/gui/common/ElidedLabel.cpp

@@ -0,0 +1,112 @@
+/****************************************************************************
+ **
+ ** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
+ ** Contact: http://www.qt-project.org/legal
+ **
+ ** This file is part of the QtCore module of the Qt Toolkit.
+ **
+ ** $QT_BEGIN_LICENSE:BSD$
+ ** You may use this file under the terms of the BSD license as follows:
+ **
+ ** "Redistribution and use in source and binary forms, with or without
+ ** modification, are permitted provided that the following conditions are
+ ** met:
+ **   * Redistributions of source code must retain the above copyright
+ **     notice, this list of conditions and the following disclaimer.
+ **   * Redistributions in binary form must reproduce the above copyright
+ **     notice, this list of conditions and the following disclaimer in
+ **     the documentation and/or other materials provided with the
+ **     distribution.
+ **   * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
+ **     of its contributors may be used to endorse or promote products derived
+ **     from this software without specific prior written permission.
+ **
+ **
+ ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+ **
+ ** $QT_END_LICENSE$
+ **
+ ****************************************************************************/
+
+#include "ElidedLabel.h"
+
+#include <QPainter>
+#include <QTextLayout>
+#include <QDebug>
+#include <QStyleOption>
+
+ElidedLabel::ElidedLabel(const QString &text, QWidget *parent)
+  : QLabel(parent)
+  , elided(false)
+  , content(text)
+{
+	setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Preferred);
+}
+
+ElidedLabel::ElidedLabel(QWidget *parent)
+  : QLabel(parent)
+  , elided(false)
+{
+	setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Preferred);
+	content="";
+}
+
+void ElidedLabel::setText(const QString &newText)
+{
+	content = newText;
+	update();
+}
+
+void ElidedLabel::paintEvent(QPaintEvent *event)
+{
+	QLabel::paintEvent(event);
+	
+	QPainter painter(this);
+	QFontMetrics fontMetrics = painter.fontMetrics();
+	QRect cr = contentsRect();
+	cr.adjust(margin(), margin(), -margin(), -margin());
+	
+	bool didElide = false;
+	int lineSpacing = fontMetrics.lineSpacing();
+	int x, y = x =cr.top()+(cr.height()-lineSpacing)/2;
+	
+	QTextLayout textLayout( content, painter.font());
+	textLayout.beginLayout();
+	forever {
+		QTextLine line = textLayout.createLine();
+		
+		if (!line.isValid())
+			break;
+		
+		line.setLineWidth(cr.width()+2*x);
+		int nextLineY = y + lineSpacing;
+		
+		if (cr.height() >= nextLineY + lineSpacing) {
+			line.draw(&painter, QPoint(x, y));
+			y = nextLineY;
+		} else {
+			QString lastLine = content.mid(line.textStart());
+			QString elidedLastLine = fontMetrics.elidedText(lastLine, Qt::ElideRight, cr.width());
+			painter.drawText(QPoint(x, y + fontMetrics.ascent()), elidedLastLine);
+			line = textLayout.createLine();
+			didElide = line.isValid();
+			break;
+		}
+	}
+	textLayout.endLayout();
+	
+	if (didElide != elided) {
+		elided = didElide;
+		emit elisionChanged(didElide);
+	}
+}

retroshare-gui/src/gui/common/ElidedLabel.h

@@ -0,0 +1,75 @@
+/****************************************************************************
+ **
+ ** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
+ ** Contact: http://www.qt-project.org/legal
+ **
+ ** This file is part of the QtCore module of the Qt Toolkit.
+ **
+ ** $QT_BEGIN_LICENSE:BSD$
+ ** You may use this file under the terms of the BSD license as follows:
+ **
+ ** "Redistribution and use in source and binary forms, with or without
+ ** modification, are permitted provided that the following conditions are
+ ** met:
+ **   * Redistributions of source code must retain the above copyright
+ **     notice, this list of conditions and the following disclaimer.
+ **   * Redistributions in binary form must reproduce the above copyright
+ **     notice, this list of conditions and the following disclaimer in
+ **     the documentation and/or other materials provided with the
+ **     distribution.
+ **   * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
+ **     of its contributors may be used to endorse or promote products derived
+ **     from this software without specific prior written permission.
+ **
+ **
+ ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+ **
+ ** $QT_END_LICENSE$
+ **
+ ****************************************************************************/
+
+ #ifndef ELIDEDLABEL_H
+ #define ELIDEDLABEL_H
+
+ #include <QLabel>
+ #include <QRect>
+ #include <QResizeEvent>
+ #include <QString>
+ #include <QWidget>
+
+ class ElidedLabel : public QLabel
+ {
+     Q_OBJECT
+     Q_PROPERTY(QString text READ text WRITE setText)
+     Q_PROPERTY(bool isElided READ isElided)
+
+ public:
+     ElidedLabel(const QString &text, QWidget *parent = 0);
+		 ElidedLabel(QWidget *parent = 0);
+
+     void setText(const QString &text);
+     const QString & text() const { return content; }
+     bool isElided() const { return elided; }
+
+ protected:
+     void paintEvent(QPaintEvent *event);
+
+ signals:
+     void elisionChanged(bool elided);
+
+ private:
+     bool elided;
+     QString content;
+ };
+
+ #endif // TEXTWRAPPINGWIDGET_H

retroshare-gui/src/retroshare-gui.pro

@@ -426,6 +426,7 @@ HEADERS +=  rshare.h \
             gui/toaster/GroupChatToaster.h \
             gui/toaster/ChatLobbyToaster.h \
             gui/toaster/FriendRequestToaster.h \
+            gui/common/ElidedLabel.h \
             gui/common/vmessagebox.h \
             gui/common/RsUrlHandler.h \
             gui/common/RsCollectionFile.h \
@@ -708,6 +709,7 @@ SOURCES +=  main.cpp \
             gui/msgs/MessageWindow.cpp \
             gui/msgs/TagsMenu.cpp \
             gui/msgs/MessageUserNotify.cpp \
+            gui/common/ElidedLabel.cpp \
             gui/common/vmessagebox.cpp \
             gui/common/RsCollectionFile.cpp \
             gui/common/RsCollectionDialog.cpp \