From c4e895a81364a04c36aba74be82223962f916842 Mon Sep 17 00:00:00 2001
From: Torsten Paul <Torsten.Paul@gmx.de>
Date: Tue, 23 Dec 2014 03:07:27 +0100
Subject: [PATCH] Add drag&drop to the FontListDialog.

---
 openscad.pro             |  2 ++
 src/FontListDialog.cc    |  2 ++
 src/FontListDialog.h     |  3 --
 src/FontListDialog.ui    | 19 +++++++++++-
 src/FontListTableView.cc | 66 ++++++++++++++++++++++++++++++++++++++++
 src/FontListTableView.h  | 18 +++++++++++
 6 files changed, 106 insertions(+), 4 deletions(-)
 create mode 100644 src/FontListTableView.cc
 create mode 100644 src/FontListTableView.h

diff --git a/openscad.pro b/openscad.pro
index c90942ea..92f1b720 100644
--- a/openscad.pro
+++ b/openscad.pro
@@ -259,6 +259,7 @@ HEADERS += src/typedefs.h \
            src/OpenCSGWarningDialog.h \
            src/AboutDialog.h \
            src/FontListDialog.h \
+           src/FontListTableView.h \
            src/builtin.h \
            src/calc.h \
            src/context.h \
@@ -428,6 +429,7 @@ SOURCES += src/version_check.cc \
            src/UIUtils.cc \
            src/Dock.cc \
            src/FontListDialog.cc \
+           src/FontListTableView.cc \
            src/launchingscreen.cc \
            src/legacyeditor.cc \
            src/LibraryInfoDialog.cc
diff --git a/src/FontListDialog.cc b/src/FontListDialog.cc
index f515774c..474c2ef3 100644
--- a/src/FontListDialog.cc
+++ b/src/FontListDialog.cc
@@ -60,6 +60,7 @@ void FontListDialog::selection_changed(const QItemSelection &current, const QIte
 {
 	if (current.count() == 0) {
 		copyButton->setEnabled(false);
+		tableView->setDragText("");
 		return;
 	}
 	
@@ -68,6 +69,7 @@ void FontListDialog::selection_changed(const QItemSelection &current, const QIte
 	const QString style = model->item(idx.row(), 1)->text();
 	selection = QString("\"%1:style=%2\"").arg(quote(name)).arg(quote(style));
 	copyButton->setEnabled(true);
+	tableView->setDragText(selection);
 }
 
 void FontListDialog::update_font_list()
diff --git a/src/FontListDialog.h b/src/FontListDialog.h
index 5624f833..d1927631 100644
--- a/src/FontListDialog.h
+++ b/src/FontListDialog.h
@@ -6,9 +6,6 @@
 #include "qtgettext.h"
 #include "ui_FontListDialog.h"
 
-#define STRINGIFY(x) #x
-#define TOSTRING(x) STRINGIFY(x)
-
 class FontListDialog : public QDialog, public Ui::FontListDialog
 {
 	Q_OBJECT;
diff --git a/src/FontListDialog.ui b/src/FontListDialog.ui
index dda5eb1b..70ff4fff 100644
--- a/src/FontListDialog.ui
+++ b/src/FontListDialog.ui
@@ -67,7 +67,17 @@
     </widget>
    </item>
    <item row="2" column="0" colspan="5">
-    <widget class="QTableView" name="tableView"/>
+    <widget class="FontListTableView" name="tableView">
+     <property name="dragEnabled">
+      <bool>true</bool>
+     </property>
+     <property name="dragDropMode">
+      <enum>QAbstractItemView::DragOnly</enum>
+     </property>
+     <property name="selectionBehavior">
+      <enum>QAbstractItemView::SelectRows</enum>
+     </property>
+    </widget>
    </item>
    <item row="0" column="0" colspan="5">
     <widget class="QLabel" name="label">
@@ -100,6 +110,13 @@
    </item>
   </layout>
  </widget>
+ <customwidgets>
+  <customwidget>
+   <class>FontListTableView</class>
+   <extends>QTableView</extends>
+   <header>FontListTableView.h</header>
+  </customwidget>
+ </customwidgets>
  <resources>
   <include location="../openscad.qrc"/>
  </resources>
diff --git a/src/FontListTableView.cc b/src/FontListTableView.cc
new file mode 100644
index 00000000..b013d81f
--- /dev/null
+++ b/src/FontListTableView.cc
@@ -0,0 +1,66 @@
+/*
+ *  OpenSCAD (www.openscad.org)
+ *  Copyright (C) 2009-2011 Clifford Wolf <clifford@clifford.at> and
+ *                          Marius Kintel <marius@kintel.net>
+ *
+ *  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 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  As a special exception, you have permission to link this program
+ *  with the CGAL library and distribute executables, as long as you
+ *  follow the requirements of the GNU GPL in regard to all of the
+ *  software in the executable aside from CGAL.
+ *
+ *  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, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ */
+#include <QDrag>
+#include <QPixmap>
+#include <QPainter>
+#include <QMimeData>
+
+#include "qtgettext.h"
+#include "FontListDialog.h"
+
+FontListTableView::FontListTableView(QWidget *parent) : QTableView(parent)
+{
+}
+
+void FontListTableView::setDragText(const QString &text)
+{
+	this->text = text.trimmed();
+}
+
+void FontListTableView::startDrag(Qt::DropActions supportedActions)
+{
+	if (text.isEmpty()) {
+		return;
+	}
+
+	QMimeData *mimeData = new QMimeData;
+	mimeData->setText(text);
+
+	QFontMetrics fm(font());
+	QRect rect(0, 0, fm.width(text), fm.height());
+	QPixmap pixmap(rect.width(), rect.height());
+	pixmap.fill(Qt::transparent);
+
+	QPainter painter(&pixmap);
+	painter.setFont(font());
+	painter.drawText(rect, Qt::AlignCenter, text);
+
+        QDrag *drag = new QDrag(this);
+	drag->setPixmap(pixmap);
+        drag->setMimeData(mimeData);
+	drag->setHotSpot(QPoint(-10, rect.height() + 6));
+        drag->exec(supportedActions, Qt::CopyAction);
+}
diff --git a/src/FontListTableView.h b/src/FontListTableView.h
new file mode 100644
index 00000000..70348c46
--- /dev/null
+++ b/src/FontListTableView.h
@@ -0,0 +1,18 @@
+#pragma once
+
+#include <QTableView>
+
+class FontListTableView : public QTableView
+{
+	Q_OBJECT;
+
+public:
+        FontListTableView(QWidget *parent = NULL);
+        void setDragText(const QString &text);
+
+protected:
+        void startDrag(Qt::DropActions supportedActions);
+
+private:
+        QString text;
+};