I have a dexterity type, with image field definition looks like this:
image = NamedBlobImage(
title=_(u'Lead Image'),
description=_(u"Upload a Image of Size 230x230."),
required=True,
)
How can I add a validator to check the uploaded image file? For example, if an image is over 500px in width, warn the user to upload another file. Hints or sample codes are appreciated.
You want to set a constraint function:
from zope.interface import Invalid
from foo.bar import MessageFactory as _
def imageSizeConstraint(value):
# value implements the plone.namedfile.interfaces.INamedBlobImageField interface
width, height = value.getImageSize()
if width > 500 or height > 500:
raise Invalid(_(u"Your image is too large"))
then set that function as the constraint of your NamedBlobImage field:
image = NamedBlobImage(
title=_(u'Lead Image'),
description=_(u"Upload a Image of Size 230x230."),
constraint=imageSizeConstraint,
required=True,
)
See the Dexterity manual on validation for more information, as well as the plone.namedfile interface definitions.
Related
Because I'm loading my icons from a font, I cannot provide a url for a image property in stylesheets. I only have access to the QPixmap or QIcon. However I'm not sure what other kind of data the image property accepts besides url's. This is what I tried:
arrow_up_icon = FontIcon('arrow-up', color='white')
arrow_up_pixmap = arrow_up_icon.pixmap(QtCore.QSize(16, 16))
header = QtWigets.QHeaderView()
header.setStyleSheet("""
QHeaderView::up-arrow{
image: %s;
}
""" % arrow_up_pixmap)
In Vaadin 14, we can set some CSS values programmatically in our Java code.
We can call getElement, then getStyle, and set the name of the CSS property along with a value.
For example, here we set the background color to green.
public class MainView extends VerticalLayout
{
public MainView ( )
{
this.getElement().getStyle().set( "background-color" , "Green" );
How do we do this for a CSS property like background-image that takes an argument of the CSS function named url?
Hard-coding the CSS path does not work.
public class MainView extends VerticalLayout
{
public MainView ( )
{
this.getElement().getStyle().set( "background-image" , "cat.jpg" );
➥ In Vaadin Flow, how to do we use Java to get CSS to find an image such as "cat.jpg"?
Furthermore, what should be the relative or absolute path to that image file be? I understand that the usual place for static images in Vaadin web app is in the src/main/resources folder.
In case of a "Plain Java Servlet" (non-Spring, non-CDI) Vaadin project, the file should go under /src/main/webapp
In case of Spring: /src/main/resources/META-INF/resources/img
Taken from official docs here: Resource Cheat Sheet
And, as #symlink has noticed in the comments, you should use a url('filename') syntax to reference an image in css : CSS background-image Property
For example, if I have a file named cat.jpg inside a /src/main/webapp/images, then this sets it getElement().getStyle().set("background-image","url('images/cat.jpg')");
Here is another example, with the picture file cat.jpg in src/main/webapp without nesting in an images folder. This is a Vaadin 14.0.10 web app, using the Plain Java Servlet technology stack option on the Start a new project with Vaadin page.
Below is the source code for an entire view using this image as a background.
Notice the first line of the constructor, where we pass "url('cat.jpg')" as an argument. See how we used single-quote marks around the file name to embed in a Java string without escaping. Fortunately the CSS specification allows for either single quotes (') or double quotes (") — quite convenient for Vaadin programmers embedding CSS within Java code.
package work.basil.example;
import com.vaadin.flow.component.button.Button;
import com.vaadin.flow.component.notification.Notification;
import com.vaadin.flow.component.orderedlayout.VerticalLayout;
import com.vaadin.flow.router.Route;
import com.vaadin.flow.server.PWA;
/**
* The main view contains a button and a click listener.
*/
#Route ( "" )
#PWA ( name = "Project Base for Vaadin", shortName = "Project Base" )
public class MainView extends VerticalLayout
{
public MainView ( )
{
this.getElement().getStyle().set( "background-image" , "url('cat.jpg')" );
Button button = new Button( "Click me" , event -> Notification.show( "Clicked!" ) );
add( button );
}
}
And a screenshot of this web app in action. The image is cropped because of the short height of the VerticalLayout. The layout is short because it contains only a button, whose label Click me can be seen faintly in blue text on the left edge. The cropped cat’s face is repeated across the page as is the default with CSS.
I want to develop new features in Quod Libet music player.
I need to increase size of specific scrollbar.
There's a function already exists to apply css to a widget:
def add_css(widget, css):
"""Add css for the widget, overriding the theme.
Can raise GLib.GError in case the css is invalid
"""
if not isinstance(css, bytes):
css = css.encode("utf-8")
provider = Gtk.CssProvider()
provider.load_from_data(css)
context = widget.get_style_context()
context.add_provider(provider, Gtk.STYLE_PROVIDER_PRIORITY_APPLICATION)
So I try to apply css as this:
self.scrollwin = sw = ScrolledWindow()
sw.set_shadow_type(Gtk.ShadowType.IN)
#get scrollbar
vscrollbar = sw.get_vscrollbar()
# 1rst attempt
# qltk.add_css(vscrollbar, '* slider {min-width: 20px;}')
#2nd attempt
qltk.add_css(vscrollbar, 'scrollbar.vertical slider {min-width: 20px;}')
I've got same error with 2 attempts:
'min-width' is not a valid property name (3)
Update 1
I try #Herbalist solution, scrollbar component is resized but "slider" always have same size. It add spaces on right and on left of "slider".
vscrollbar.set_size_request(50,-1)
Is it possible to resize slider of scrollbar ?
Screenshot of result (I outline part of scrollbar in green):
I'm not able to success with css, so I use deprecated method:
GtkRange:slider-width has been deprecated since version 3.20 and
should not be used in newly-written code.
Use the min-height/min-width CSS properties on the slider element. The
value of this style property is ignored.
As this:
qltk.add_css(vscrollbar, '* {-GtkRange-slider-width:40px}')
get_vscrollbar() returns a Gtk.Widget so you could try setting the "width-request" property
Disable width and height fields from image properties I am using ckeditor 4
CKEDITOR.replace('<%=txtCkEditor.ClientID %>', {allowedContent:'img[!src,alt];'});
By using above method it shows only image properties with width and height hidden and rest of the controls also get visible false. Kindly suggest me a solution for disabling the width and height fields from image properties windows.
Thanks in advance.
I'm not sure I entirely understand your question. It seems you want to hide the fields that allow input of height and width. Your initial solution doesn't seem to affect the dialog box, but what content gets saved. These are very different kinds of solutions. My answer assumes you're seeking to alter the image properties dialog box fields.
Based on this earlier question, I recommend adding the following configuration:
CKEDITOR.on('dialogDefinition', function(ev) {
var editor = ev.editor;
var dialogName = ev.data.name;
var dialogDefinition = ev.data.definition;
if (dialogName == 'image') {
var infoTab = dialogDefinition.getContents( 'info' );
infoTab.remove( 'txtWidth' ); // Remove width element from Info tab
infoTab.remove( 'txtHeight' ); // Remove height element from Info tab
}
});
I'm creating some custom content types using dexterity. I would like to "customize" the aspect of a RichText Field allowing only basic buttons of TinyMce on this field.
In Archetypes I could use
TextField('text',
allowable_content_types=('text/html',),
default_output_type='text/x-html-safe',
required=1,
widget=RichWidget
(label='Content',
allow_buttons=(
'bold',
'italic',
'justifyleft',
'justifyright',
),
),),
How would I do this with Dexerity based contenttypes?
There doesn't appear to be a "nice" way to do this right now. Even the Plone docs are currently at a loss. http://docs.plone.org/develop/plone/forms/wysiwyg.html#id9
The problem lies with Products.TinyMCE trying to get the WYSIWYG configuration from the widget attribute of the Field.
https://github.com/plone/Products.TinyMCE/blob/1.3.6/Products/TinyMCE/utility.py#L711-L713
# Get widget attributes
widget = getattr(field, 'widget', None)
filter_buttons = getattr(widget, 'filter_buttons', None)
allow_buttons = getattr(widget, 'allow_buttons', None)
But, as I understand, with Dexterity we instead map fields to widgets on the form object.
from plone.autoform import directives as form
from plone.app.z3cform.wysiwyg import WysiwygFieldWidget
class IExample(model.schema):
form.widget('body', WysiwygFieldWidget)
body = schema.Text(title=u"Body")
So, our body field possesses no widget attribute from which Products.TinyMCE can extract configurations.
At any rate, if you need it to work right now, I was able to hack it by doing the following:
In your ZMI, customize portal_skins/tinymce/tinymce_wysiwyg_support to change the line field field|nothing to field field|view/field|nothing.
Define your content type in a schema-driven fashion, and for your WYSIWYG field do the following:
class mywidg(object):
allow_buttons = ('bold',
'italic',
'justifyright',
'justifyleft',)
class IExample(model.schema):
form.widget('body', WysiwygFieldWidget)
body = schema.Text(title=u"Body")
body.widget = mywidg()