def __init__(self):
super(HTMLWidget, self).__init__()
self.settings().setAttribute(
QWebSettings.LocalContentCanAccessRemoteUrls, True)
self.settings().setAttribute(QWebSettings.DeveloperExtrasEnabled, True)
self.setPage(WebPage())
self._obj = None
self._styles = [_DEFAULT_STYLES]
self._header = ''
self._body = ''
self.add_to_js('widget', self)
self._event = EventEmitter()
self.add_header('''<script>
var emit = function (name, arg) {
widget._emit_from_js(name, JSON.stringify(arg));
};
</script>''')
self._pending_js_eval = []
def __init__(self):
super(HTMLWidget, self).__init__()
self.settings().setAttribute(
QWebSettings.LocalContentCanAccessRemoteUrls, True)
self.settings().setAttribute(
QWebSettings.DeveloperExtrasEnabled, True)
self.setPage(WebPage())
self._obj = None
self._styles = [_DEFAULT_STYLES]
self._header = ''
self._body = ''
self.add_to_js('widget', self)
self._event = EventEmitter()
self.add_header('''<script>
var emit = function (name, arg) {
widget._emit_from_js(name, JSON.stringify(arg));
};
</script>''')
self._pending_js_eval = []
class HTMLWidget(QWebView):
"""An HTML widget that is displayed with Qt.
Python methods can be called from Javascript with `widget.the_method()`.
They must be decorated with `pyqtSlot(str)` or similar, depending on
the parameters.
"""
title = 'Widget'
body = ''
def __init__(self):
super(HTMLWidget, self).__init__()
self.settings().setAttribute(
QWebSettings.LocalContentCanAccessRemoteUrls, True)
self.settings().setAttribute(QWebSettings.DeveloperExtrasEnabled, True)
self.setPage(WebPage())
self._obj = None
self._styles = [_DEFAULT_STYLES]
self._header = ''
self._body = ''
self.add_to_js('widget', self)
self._event = EventEmitter()
self.add_header('''<script>
var emit = function (name, arg) {
widget._emit_from_js(name, JSON.stringify(arg));
};
</script>''')
self._pending_js_eval = []
self._built = None
# Events
# -------------------------------------------------------------------------
def emit(self, *args, **kwargs):
return self._event.emit(*args, **kwargs)
def connect_(self, *args, **kwargs):
self._event.connect(*args, **kwargs)
def unconnect_(self, *args, **kwargs):
self._event.unconnect(*args, **kwargs)
# Headers
# -------------------------------------------------------------------------
def add_styles(self, s):
"""Add CSS styles."""
self._styles.append(s)
def add_style_src(self, filename):
"""Link a CSS file."""
self.add_header(('<link rel="stylesheet" type="text/css" '
'href="{}" />').format(filename))
def add_script_src(self, filename):
"""Link a JS script."""
self.add_header('<script src="{}"></script>'.format(filename))
def add_header(self, h):
"""Add HTML code to the header."""
self._header += (h + '\n')
# HTML methods
# -------------------------------------------------------------------------
def set_body(self, s):
"""Set the HTML body."""
self._body = s
def add_body(self, s):
"""Add HTML code to the body."""
self._body += '\n' + s + '\n'
def html(self):
"""Return the full HTML source of the widget."""
return self.page().mainFrame().toHtml()
def rebuild(self):
styles = '\n\n'.join(self._styles)
html = _PAGE_TEMPLATE.format(
title=self.title,
styles=styles,
header=self._header,
body=self._body,
)
logger.log(5, "Set HTML: %s", html)
static_dir = op.join(op.realpath(op.dirname(__file__)), 'static/')
base_url = QUrl().fromLocalFile(static_dir)
self.setHtml(html, base_url)
def build(self):
"""Build the full HTML source."""
if self.is_built(): # pragma: no cover
return
with _wait_signal(self.loadFinished, 20):
self.rebuild()
self._built = True
def is_built(self):
return self._built
# Javascript methods
# -------------------------------------------------------------------------
def add_to_js(self, name, var):
"""Add an object to Javascript."""
frame = self.page().mainFrame()
frame.addToJavaScriptWindowObject(name, var)
def eval_js(self, expr):
"""Evaluate a Javascript expression."""
if not self.is_built():
self._pending_js_eval.append(expr)
return
logger.log(5, "Evaluate Javascript: `%s`.", expr)
out = self.page().mainFrame().evaluateJavaScript(expr)
return _to_py(out)
@pyqtSlot(str, str)
def _emit_from_js(self, name, arg_json):
self.emit(text_type(name), json.loads(text_type(arg_json)))
def show(self):
self.build()
super(HTMLWidget, self).show()
# Call the pending JS eval calls after the page has been built.
assert self.is_built()
for expr in self._pending_js_eval:
self.eval_js(expr)
self._pending_js_eval = []
class HTMLWidget(QWebView):
"""An HTML widget that is displayed with Qt.
Python methods can be called from Javascript with `widget.the_method()`.
They must be decorated with `pyqtSlot(str)` or similar, depending on
the parameters.
"""
title = 'Widget'
body = ''
def __init__(self):
super(HTMLWidget, self).__init__()
self.settings().setAttribute(
QWebSettings.LocalContentCanAccessRemoteUrls, True)
self.settings().setAttribute(
QWebSettings.DeveloperExtrasEnabled, True)
self.setPage(WebPage())
self._obj = None
self._styles = [_DEFAULT_STYLES]
self._header = ''
self._body = ''
self.add_to_js('widget', self)
self._event = EventEmitter()
self.add_header('''<script>
var emit = function (name, arg) {
widget._emit_from_js(name, JSON.stringify(arg));
};
</script>''')
self._pending_js_eval = []
self._built = None
# Events
# -------------------------------------------------------------------------
def emit(self, *args, **kwargs):
return self._event.emit(*args, **kwargs)
def connect_(self, *args, **kwargs):
self._event.connect(*args, **kwargs)
def unconnect_(self, *args, **kwargs):
self._event.unconnect(*args, **kwargs)
# Headers
# -------------------------------------------------------------------------
def add_styles(self, s):
"""Add CSS styles."""
self._styles.append(s)
def add_style_src(self, filename):
"""Link a CSS file."""
self.add_header(('<link rel="stylesheet" type="text/css" '
'href="{}" />').format(filename))
def add_script_src(self, filename):
"""Link a JS script."""
self.add_header('<script src="{}"></script>'.format(filename))
def add_header(self, h):
"""Add HTML code to the header."""
self._header += (h + '\n')
# HTML methods
# -------------------------------------------------------------------------
def set_body(self, s):
"""Set the HTML body."""
self._body = s
def add_body(self, s):
"""Add HTML code to the body."""
self._body += '\n' + s + '\n'
def html(self):
"""Return the full HTML source of the widget."""
return self.page().mainFrame().toHtml()
def rebuild(self):
styles = '\n\n'.join(self._styles)
html = _PAGE_TEMPLATE.format(title=self.title,
styles=styles,
header=self._header,
body=self._body,
)
logger.log(5, "Set HTML: %s", html)
static_dir = op.join(op.realpath(op.dirname(__file__)), 'static/')
base_url = QUrl().fromLocalFile(static_dir)
self.setHtml(html, base_url)
def build(self):
"""Build the full HTML source."""
if self.is_built(): # pragma: no cover
return
with _wait_signal(self.loadFinished, 20):
self.rebuild()
self._built = True
def is_built(self):
return self._built
# Javascript methods
# -------------------------------------------------------------------------
def add_to_js(self, name, var):
"""Add an object to Javascript."""
frame = self.page().mainFrame()
frame.addToJavaScriptWindowObject(name, var)
def eval_js(self, expr):
"""Evaluate a Javascript expression."""
if not self.is_built():
self._pending_js_eval.append(expr)
return
logger.log(5, "Evaluate Javascript: `%s`.", expr)
out = self.page().mainFrame().evaluateJavaScript(expr)
return _to_py(out)
@pyqtSlot(str, str)
def _emit_from_js(self, name, arg_json):
self.emit(text_type(name), json.loads(text_type(arg_json)))
def show(self):
self.build()
super(HTMLWidget, self).show()
# Call the pending JS eval calls after the page has been built.
assert self.is_built()
for expr in self._pending_js_eval:
self.eval_js(expr)
self._pending_js_eval = []