pilotclient/src/blackgui/share/qss/stdwidget.qss

/*
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:
1) there is no opacity with background image, so we need semitransparent images
2) use -- instead of :: for namespaces

Used dynamic properties
framelessMainWindow (infobar.qss , here)
*/

QFrame {
  border-style: solid;
  border-color: transparent;
  border-width: 1px;
}

QCheckBox::indicator {
  color: #b1b1b1;
  border: 1px solid #7f7f7f;
  width: 15px;
  height: 15px;
}

QCheckBox::indicator::checked {
  image: url(:/diagona/icons/diagona/icons/tick.png);
}

QCheckBox::indicator:indeterminate {
  image: url(:/diagona/icons/diagona/icons/question.png);
}

/* Main window */
QMainWindow {
  background-image: url(:/textures/icons/textures/texture-outer.jpg);
  background-color: darkslategray;
}

/* separator between info areas and rest */
/* this hides them */
QMainWindow::separator {
  background: transparent;
  width: 0px;  /* when vertical */
  height: 0px; /* when horizontal */
}

QMainWindow::separator:hover {
  background: transparent;
}

/* Dialog, sometimes main window */
QDialog {
  background-image: url(:/textures/icons/textures/texture-outer.jpg);
  background-color: darkslategray;
}

/* separator between info areas and rest */
/* this hides them */
QDialog::separator {
  background: transparent;
  width: 0px;  /* when vertical */
  height: 0px; /* when horizontal */
}

QDialog::separator:hover {
  background: transparent;
}

/* selector QWizard not working, so using individual components */
BlackGui--Components--CCopyConfigurationComponent {
  background: black; /* background is background color here */
  background-image: url(:/textures/icons/textures/texture-inner.jpg);
}

QFileDialog #sidebar {
  background: black;
}

QFileDialog QToolButton {
  background: inherit;
}

/*
  Required when dock widget is floating
  1) background-image not working on QDockWidget, so I use direct children for that
  2) seems to have only effect as normal (floating) window
  3) Borders between this widget and the inner child are the margins defined in dockwidget
*/
BlackGui--CDockWidgetInfoArea {
  background-color: green; /* Use green or red here to adjust the borders */
}

/* outer widget in dock widget */
BlackGui--CDockWidgetInfoArea > QWidget[dockwidget="outerwidget"] {
  background: black; /* background is background color here */
  background-image: url(:/textures/icons/textures/texture-inner.jpg);
}

/* this is the first widget in the dock area */
/* all dock widgets shall have this QWidget as container */
BlackGui--CDockWidgetInfoArea[framelessDockWidget="true"] > QWidget > QFrame[dockwidget="innerwidget"] {
  margin: 0px;
  padding: 3px;
  border: 2px solid green;
  border-radius: 10px;
}

BlackGui--CDockWidgetInfoArea[framelessDockWidget="false"] > QWidget > QFrame[dockwidget="innerwidget"] {
  /* void */
}

/* required when info area is not floating */
BlackGui--CInfoArea {
  background: black; /* background is background color here */
  background-image: url(:/textures/icons/textures/texture-inner.jpg);
}

/* Overlay messages */
BlackGui--COverlayMessages {
  background: transparent; /* background is background color here */
  background-image: url(:/textures/icons/textures/texture-inner.jpg);
  border: 2px solid blue;
  border-radius: 10px;
}

BlackGui--CDropSite {
  color: grey;
  border: 2px dashed grey;
  border-radius: 5px;
  min-height: 18px;
  max-height: 18px;
  margin: 2px;
  padding: 2px;
}

/* Validator bar */
BlackGui--Editors--CValidationIndicator {
  background: black; /* background is background color here */
  background-image: url(:/textures/icons/textures/texture-inner.jpg);
}

BlackGui--CPluginDetailsWindow,
BlackGui--CPluginConfigWindow {
  background: black;
}

/* default for buttons */
QToolButton {
  background-color: transparent; /* transparent tool buttons */
  border: 0px;
}

QPushButton {
  background-color: rgba(0, 0, 255, 128);
  border-style: 1px solid yellow;
  border-radius:3px;
  color: yellow;  /* font color */
  padding: 0px;
  margin-right: 5px;
  min-width:60px;
  min-height:20px;
}

QPushButton::disabled {
  background-color: rgba(77, 88, 99, 128); /* slated gray if a channel) */
  border-style: none;
  border-radius: 3px;
  color: white;
  padding: 0px;
  margin-right: 5px;
  qproperty-textElideMode: ElideMiddle;
}

QProgressBar {
  border: 1px solid green;
  border-radius: 5px;
  background-color: black;
  text-align: center;
  padding: 0px;
  height: 16px;
}

QProgressBar::chunk {
  background-color: darkblue;
  width: 10px;
  margin: 0.5px;
}

QTabWidget::pane { /* The tab widget frame */
  border: none;
}

QTabWidget::tab-bar  {
  left: 5px; /* move to the right by 5px */
}

QTabBar::tab {
  border: 1px solid green;
  border-top-left-radius: 6px;
  border-top-right-radius: 6px;
  min-width: 30px;
  padding: 2px;
  padding-left: 4px;
  padding-right: 4px;
  margin-right: 3px;
}

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;
}

QSplitter { margin: 0px; }
QSplitter::handle {
  background-color: rgba(0, 0, 255, 200);
  margin-top: 1px;
  margin-bottom: 1px;
  height: 1px;
}

QSplitter::handle:pressed {
  background-color: rgba(0, 255, 255, 255);
}

/*
QSplitter::handle:horizontal {
  width: 1px;
}

QSplitter::handle:vertical {
  height: 1px;
}
*/

QLabel {
  background: transparent;
}

QLineEdit {
  background: black;
  border: 1px solid green;
  border-radius: 5px;
}

QLineEdit[readOnly="true"] {
  background: transparent;
}

QCheckBox {
  border: 0px solid green; /* also borders label */
  background: transparent;
}

QTextEdit {
  border: 1px solid green;
  background: transparent;
  border-radius: 5px;
}

QPlainTextEdit {
  border: 1px solid green;
  background: transparent;
  border-radius: 5px;
}

QGroupBox {
  border: 1px solid green;
  margin-top: 2.5ex; /* leave space at the top for the title */
  border-radius: 5px;
  background: black; /* background is background color here */
  background-image: url(:/textures/icons/textures/texture-inner.jpg);
}

QGroupBox::title {
  top: 2px;
  left: 5px;
  subcontrol-origin: margin;
  subcontrol-position: middle left; /* position at the top center */
  padding: 0px 10px;
  background-color: darkblue;
  border: 1px solid green;
  border-radius: 5px;
}

QToolBox::tab {
  border: 1px solid green;
  border-radius: 6px;
  min-width: 30px;
  padding: 2px;
  padding-left: 4px;
  padding-right: 4px;
}

QToolBox::tab::selected {
  background-color: rgba(0, 0, 255, 128);
}

QToolBox::tab::!selected {
  background-color: rgba(0, 0, 255, 48);
}

/* no border on page */
QToolBox > QWidget {
  border: 0px;
}

QComboBox {
  border: 1px solid green;
  border-radius: 5px;
  padding: 1px;
  background: transparent;
  selection-background-color: #3f98ff;
}

/* drop down list */
QComboBox QAbstractItemView {
  background-color: black;
  color: lightgray;
  qproperty-textElideMode: ElideMiddle;
}

QDoubleSpinBox {
  border: 1px solid green;
  border-radius: 5px;
  padding: 1px;
  background: transparent;
}

QSpinBox {
  border: 1px solid green;
  border-radius: 5px;
  padding: 1px;
  background: transparent;
}

QColorDialog {
  background-image: url(:/textures/icons/textures/texture-outer.jpg);
  background-color: darkslategray;
}

QMenuBar {
  background-image: url(:/textures/icons/textures/texture-outer.jpg);
  background-color: darkslategray;
  padding: 5px 0px 0px 10px;
  margin: 0px 0px 30px 0px; /* removes overlapping bar in frameless mode, why bottom margin helps here, no idea, bug? */
}

QMenuBar::item {
  spacing: 5px; /* spacing between menu bar items */
  padding: 3px 3px;
  background: transparent;
  border-radius: 4px;
}

QMenuBar::item:selected { /* when selected using mouse or keyboard */
  background: black;
}

QMenuBar::item:pressed {
  background: black;
}

BlackGui--CDockWidgetInfoArea > QMenu > QMenuWidget {
  border: 0px; /* reserve space for selection border */
}

/* reset menu style */
QMenu {
  color: black;
  font-style: normal;
  font-weight: normal;
  padding: 5px;
}

QMenu::item {
  padding: 4px 25px 4px 20px;
}

/* fix margin style */
QMenu > QFrame {
  color: black;
}

BlackGui--Components--CMarginsInput {
  color: black;
}

QRadioButton::indicator:checked, QRadioButton::indicator:unchecked {
  color: #b1b1b1;
  background-color: #000000;
  border: 1px solid #b1b1b1;
  border-radius: 7px;
}

QRadioButton::indicator:checked {
  background-color: qradialgradient(
    cx: 0.5, cy: 0.5,
    fx: 0.5, fy: 0.5,
    radius: 1.0,
    stop: 0.25 #32cd32,
    stop: 0.3 #000000
  );
}

QScrollArea {
  border: 1px solid green;
  border-radius: 5px;
}

/* have to set background on widget in scroll area, cannot set directly on scroll area */
/* The inner widget I want to modify is on 2nd level. QScrollArea > QWidget selects too many */
/* http://doc.qt.io/qt-4.8/stylesheet-syntax.html */
QScrollArea > * > QWidget {
  background: black; /* background is background color here */
  background-image: url(:/textures/icons/textures/texture-inner.jpg);
}

QScrollArea QMenu {
  border: 1px solid darkslategray; /* reserve space for selection border */
  background: lightgray;
  color: black;
  padding: 0px;
}

QScrollBar:horizontal {
  border: 2px solid gray;
  background: slategray;
  height: 10px;
  margin: 0px 5px 0px 5px;
}

QScrollBar:vertical {
  border: 2px solid gray;
  background: slategray;
  width: 10px;
  margin: 5px 0px 5px 0;
}

QScrollBar::handle:horizontal {
  background: black;
  min-width: 15px;
}

QScrollBar::handle:vertical {
  background: black;
  min-height: 15px;
}

QScrollBar::add-line:horizontal {
  border: 2px solid gray;
  background: blue;
  width: 5px;
  subcontrol-position: right;
  subcontrol-origin: margin;
}

QScrollBar::sub-line:horizontal {
  border: 2px solid gray;
  background: blue;
  width: 5px;
  subcontrol-position: left;
  subcontrol-origin: margin;
}

QScrollBar::add-line:vertical {
  border: 2px solid gray;
  background: blue;
  height: 5px;
  subcontrol-position: bottom;
  subcontrol-origin: margin;
}

QScrollBar::sub-line:vertical {
  border: 2px solid gray;
  background: blue;
  height: 5px;
  subcontrol-position: top;
  subcontrol-origin: margin;
}

QHeaderView::section {
  border: 1px solid black;
  background-color: darkslategray;
  color: white; /* font */
  padding: 1px;
  margin: 0px;
}

QHeaderView {
  border-width: 0px;
}

/* style the sort indicator */
QHeaderView::down-arrow {
  image: url(:/diagona/icons/diagona/icons/arrow-270-small.png);
  subcontrol-position: bottom left;
}

QHeaderView::up-arrow {
  image: url(:/diagona/icons/diagona/icons/arrow-090-small.png);
  subcontrol-position: bottom left;
}

QTableView, QTreeView, QListView {
  border: 1px solid green;
  border-radius: 5px;
  background-color: transparent;
  alternate-background-color: darkslategray;
  selection-background-color: blue;
  margin-left: 2px;
  margin-right: 2px;
  margin-top: 2px;
  margin-bottom: 2px;
  padding:0px;
}

QTableView::item:selected {
  background-color: blue;
}

QTreeView {
  show-decoration-selected: 1;
}

QTreeView::item {
  border: 0px;
  padding: 2px 2px 2px 2px;
}

QTreeView::item:hover {
  background: green;
}

QTreeView::item:selected {
  background: blue;
}

QTreeView::branch:open:has-children {
  image: url(:/diagona/icons/diagona/icons/toggle.png);
}

QTreeView::branch:closed:has-children {
    image: url(:/diagona/icons/diagona/icons/toggle-expand.png);
}

QSlider::groove:horizontal {
  border: 1px solid gray;
  height: 4px; /* the groove expands to the size of the slider by default. by giving it a height, it has a fixed size */
  background: darkslategray;
}

QSlider::handle:horizontal {
  background: lightgray;
  border: 1px solid darkslategray;
  width: 18px;
  margin: -2px 0; /* handle is placed by default on the contents rect of the groove. Expand outside the groove */
  border-radius: 3px;
}

QSizeGrip {
  image: url(:/diagona/icons/diagona/icons/arrow-in-out.png);
  padding: 0px 20px 0px 0px;
  width: 16px;
  height: 16px;
}

QStatusBar {
  background: transparent;
}

QStatusBar::item {
  border: none;
}

QStatusBar QLabel {
  border: none;
  padding-left: 5px;
}