refs #335, style sheet fixes / improvements and support methods

style sheets:
* style sheets with background textures
* scroll area / toolbox style sheet fix
* floating dock widgets
* kept 1st version of stylesheets in backup directory
* removed maininfoarea stylesheet, no longer needed with fixed style sheet

code
* central paintEvent method to enable style sheets in derived widgets
* detect frameless windows, dynamic properties

src/blackgui/qss/mainwindow.qss

@@ -1,13 +1,120 @@
-/** http://qt-project.org/doc/qt-5.3/stylesheet-examples.html **/
+/**
+Resources:
+http://qt-project.org/doc/qt-5.3/stylesheet-examples.html
+http://web.forret.com/tools/color.asp?RGB=2F4F4F&name=Dark+slate+gray
 
+Remarks:
+there is no opacity with background image, so we need semitransparent images
+use -- instead of :: for namespaces
+
+Used dynamic properties
+mainframeless (infobar.qss)
+**/
+
+/** putting background here works for framed, but not for frameless window **/
 #MainWindow {
+    background-image: url(:/textures/icons/textures/texture-outer.jpg);
     background-color: darkslategray;
 }
 
-QWidget {
+/** required when dock widget is floating **/
+#sw_MainMiddle QDockWidget {
+    background-image: url(:/textures/icons/textures/texture-inner.jpg);
     background-color: black;
 }
 
+/** required when info area is floating **/
+BlackGui--CInfoArea {
+    background-image: url(:/textures/icons/textures/texture-inner.jpg);
+    background-color: black;
+}
+
+/** fix scroll areas **/
+/** in flight plan **/
+QAbstractScrollArea #qw_FlightPlanTabMain { background-color: black; }
+QAbstractScrollArea #qw_RemarksGenerator { background-color: black; }
+
+/** in log component **/
+QAbstractScrollArea #pg_StatusPageMessages { background-color: black; }
+QAbstractScrollArea #pg_StatusPageConsole { background-color: black; }
+
+/** main GUI parts **/
+
+#dw_InfoBarStatus {
+    background-image: url(:/textures/icons/textures/texture-outer.jpg);
+    background-color: darkslategray;
+}
+
+#wi_CentralWidgetOutside {
+    background-image: url(:/textures/icons/textures/texture-outer.jpg);
+    background-color: darkslategray;
+    margin: 0px;
+    padding: 5px;
+}
+
+#fr_CentralFrameInside {
+    margin: 5px;
+}
+
+#gb_AtcStationsOnlineInfo {
+    border-style: none;
+}
+
+#sw_MainMiddle {
+    padding: 3px;
+    border: 1px solid green;
+    border-radius: 10px;
+    background-image: url(:/textures/icons/textures/texture-inner.jpg);
+}
+
+#sw_MainMiddle QPushButton {
+    background-color: rgba(0, 0, 255, 128);
+    border-style: none;
+    border-radius:3px;
+    color: yellow;
+    padding: 3px;
+}
+
+#wi_MainKeypadArea QPushButton {
+    /** background-image: url(:/textures/icons/textures/texture-inner.jpg); **/
+    /** need to fix pressed button first **/
+    background: black;
+    border-style: solid;
+    border-width: 1px;
+    border-radius:6px;
+    border-color: green;
+    max-height:20px;
+    min-width:60px;
+    min-height:20px;
+}
+
+/** cockpit needs to come after sw_MainMiddle **/
+#comp_CockpitComComponent QPushButton {
+    background-color: transparent;
+    border-style: solid;
+    border-radius:3px;
+    border-width: 0px;
+    border-color: blue;
+    color: lightblue;
+    padding: 1px;
+    margin: 2px;
+}
+
+#wip_CockpitComPanelShowHideBar QPushButton {
+    background-color: transparent;
+    border-style: solid;
+    border-radius:3px;
+    border-width: 0px;
+    border-color: blue;
+}
+
+#le_CommandLineInput {
+    background-image: url(:/textures/icons/textures/texture-inner.jpg);
+    margin-bottom: 5px;
+    padding: 3px;
+    border-radius: 5px;
+}
+
 QProgressBar {
     border: 1px solid green;
     border-radius: 5px;
@@ -22,70 +129,6 @@ QProgressBar::chunk {
     margin: 0.5px;
 }
 
-#wi_CentralWidgetOutside {
-    /** there is no opacity with background image, so we need semitransparent images **/
-    /** background-image: url(:/blackgui/icons/titaniumtexture.jpg) **/
-    /** border: 2px solid green; **/
-    /** border-radius: 20px; **/
-    background-color: darkslategray;
-    margin: 0px;
-    padding: 5px;
-}
-
-#fr_CentralFrameInside {
-    background-color: darkslategray;
-    margin: 5px;
-}
-
-#wi_MainKeypadArea {
-    background-color: darkslategray;
-}
-
-#gb_AtcStationsOnlineInfo {
-    border-style: none;
-}
-
-#sw_MainMiddle {
-    padding: 3px;
-    border: 0px;
-    border-radius: 10px;
-}
-
-#sw_MainMiddle QPushButton {
-    background-color: rgba(0, 0, 255, 128);
-    border-style: none;
-    border-radius:3px;
-    color: yellow;
-    padding: 3px;
-}
-
-/* No style for Dial
-#sw_MainMiddel QDial {
-    background-color: rgba(0, 0, 255, 128);
-}
-*/
-
-#wi_MainKeypadArea QPushButton {
-    background-color: black;
-    border-style: solid;
-    border-width:1px;
-    border-radius:6px;
-    border-color: green;
-    max-height:20px;
-    min-width:60px;
-    min-height:20px;
-}
-
-#wi_MainKeypadAreaWindow {
-    background-color: darkslategray;
-}
-
-#le_CommandLineInput {
-    margin-bottom: 5px;
-    padding: 3px;
-    border-radius: 5px;
-}
-
 QTabWidget::pane { /* The tab widget frame */
     border: none;
 }
@@ -109,22 +152,32 @@ QTabBar::tab::selected {
     background-color: rgba(0, 0, 255, 128);
 }
 
+QTabBar::tear {
+    image: url(:/own/icons/own/transparent1px.png);
+    max-width: 1px;
+}
+
+QTabBar QToolButton { /* the scroll buttons are tool buttons */
+    background-color: rgba(0, 0, 255, 200);
+    border: 1px solid green;
+}
+
 QLabel {
     background: transparent;
 }
 
 QLineEdit {
-    background: black;
+    background: transparent;
     border: 1px solid green;
     border-radius: 5px;
 }
 
 QLineEdit[readOnly="true"] {
-    background: black;
+    background: transparent;
 }
 
 QCheckBox {
-    border: 0px solid green;
+    border: 0px solid green; /** also borders label **/
     background: transparent;
 }
 
@@ -146,13 +199,9 @@ QGroupBox {
 }
 
 QGroupBox::title {
-        subcontrol-origin: margin;
-        subcontrol-position: middle center; /* position at the top center */
-        padding: 0 3px;
-}
-
-QToolBox {
-    border: none;
+    subcontrol-origin: margin;
+    subcontrol-position: middle center; /* position at the top center */
+    padding: 0 3px;
 }
 
 QToolBox::tab {
@@ -168,6 +217,11 @@ QToolBox::tab::selected {
     background-color: rgba(0, 0, 255, 128);
 }
 
+/** no border on page */
+QToolBox > QWidget {
+    border: 0px;
+}
+
 QComboBox {
     border: 1px solid green;
     border-radius: 5px;
@@ -175,6 +229,12 @@ QComboBox {
     background: transparent;
 }
 
+/** drop down list **/
+QComboBox QAbstractItemView {
+    background-color: lightgray;
+    color: black;
+}
+
 QDoubleSpinBox  {
     border: 1px solid green;
     border-radius: 5px;
@@ -183,7 +243,8 @@ QDoubleSpinBox  {
 }
 
 QMenuBar {
-    background: darkslategray;
+    background-image: url(:/textures/icons/textures/texture-outer.jpg);
+    background-color: darkslategray;
 }
 
 QMenuBar::item {
@@ -279,13 +340,14 @@ QHeaderView::section {
 QTableView {
     border: 1px solid green;
     border-radius: 5px;
-    background-color: black;
+    background-color: transparent;
     alternate-background-color: darkslategray;
     selection-background-color: blue;
     margin-left: 2px;
-    margin-top: 1px;
-    margin-bottom: 0;
-    padding:0;
+    margin-right: 2px;
+    margin-top: 2px;
+    margin-bottom: 2px;
+    padding:0px;
 }
 
 QSlider::groove:horizontal {
@@ -309,7 +371,8 @@ QSizeGrip {
 }
 
 QStatusBar {
-    background: darkslategray;
+    background-image: url(:/textures/icons/textures/texture-outer.jpg);
+    background-color: darkslategray;
 }
 
 QStatusBar::item {