Is it possible to capture the screen rendering of a QML Component and save it to an image file? I would like to drive a Component through several different states, and capture its visual appearance for documentation purposes, without having to do screen/window captures.
Yes, you could set up your state transitions to call QWidget::grab then save it to a file through QPixmap.
If you need an example of how to set up your code to call QWidget::grab take a look at this answer: How to take ScreenShot Qt/QML
It's important to replace QPixmap::grabWidget with QWidget::grab because QPixmap::grabWidget is now obsolete. Once you have the QPixmap from QWidget::grab follow the documentation in QPixmap to save to the format you'd like such as jpeg, png, gif.
Here are some links to the documentation to help you out.
QWidget::grab
QPixmap
QPixmap::save
With Qt 5.4 it is now made easier with grabToImage - this method resides on all QQuickItem objects.
EDIT
It's worth mentioning that the item you call grabToImage() on must be a child of a top-level Window item container
Related
In a Dolphin smalltalk treeview I'd like to use a custom icon, depending on the state of the item displayed, (differente state, different icon)
How can I do that ?
I cannot really understand how to use a "my" icon.
I've create a class "connection", with an instance variable "connected"
and two class methods "connectedIcon and unconnectedIcon that returns icon images.
Then an instance function "icon" that returns one or the other image based on the connection state.
I can add instances of this class to a tree view and see the name of the connections.
But how to show my Icons ?
I tried to sustitute the getImageBlock of my presenter view with the following expression [:obj | obj icon] but it doesn't work.
(nothing seems to happen).
this is made in my presenter initialize :
initialize
super initialize.
treePresenter view getImageBlock: [:obj | obj icon]
what's wrong with it ?
best regards
Maurizio
When you are editing a TreeView, one of the properties is getImageBlock. By default it is not really a block but another object that understands the message #'value:' (the class IconicListAbstract). You can replace this property with a code block (or other object that understands #'value:') and answer the image you want displayed.
In Microsoft Windows, icons are typically stored in a DLL. You should be able to use an icon explorer or editing tool to see the icons in a dll. For example, get IconExplorer from http://www.mitec.cz/iconex.html and try opening DolphinDR7.dll. Do the icons and numbers match what you see when you return a number in your application?
To determine (or override) the resource library used, see SessionManager>>#'defaultResLibPath'.
Typically, the getImageBlock is set using the property editor in the GUI editor, but setting it through code can work as well.
Wonderful Dolphin Smalltalk!
I had two problems
1) how and where to modify the getImageBlock method of my Treepresenter.
2) where to put the icons ad how to get the imageindex of each icon.
This is the solution :
1) it's not needed.
The treeview sends an #iconImageIndex" message to my model
this is handled by the default method (in the Object class) that send to my object the message #icon
and to the result of this message (an icon) the message #iconIndex.
This message is understood from the icon that answers with its own iconIndex.
So the only method I need to impement is #icon in my class Connection
that I implemented as follows:
icon
opened ifTrue: [^Connection connectedIcon] ifFalse: [^Connection unconnectedIcon]
In the class itself the two icons are imported in the image by evaluating the createIconMethod,
as explained in the blog article 'Beauty with less Beast'.
So my problems are solved.
Thanks to all.
Maurizio.
Is there an example of the resize function for dropzone.js? I don't really understand how it works, it says:
"Resize is the function that gets called to create the resize information. It gets the file as first parameter and must return an object with srcX, srcY, srcWidth and srcHeight and the same for trg*. Those values are going to be used by ctx.drawImage()."
But I don't really get how to use it. So far I'm resizing the images on server-side, but I'd like to do it client-side and I think this might help. Any other solutions using dropzone.js if not this one?
I believe the built-in resize function in dropzoneJS is what is used to create the thumbnail, not resize the photo client-side, per se. There might be some way you could leverage it by setting the thumbnail dimensions to what you want to save to the server, and overwriting the file being saved with the thumbnail, but I'd have to hack about for a spell to offer you any code suggestions for that.
I'm re-creating an AIR app with FB 4.5.1. (I've started from scratch, having had trouble importing FB 4 projects).
In the app.xml I have the following defined:
<systemChrome>none</systemChrome>
<transparent>true</transparent>
Having done this I still get a full window with titlebar, min, max, and close buttons.
what gives?
I believe you need to create a skin for the application.
This appears in Adobe's forum, and includes an FXP of a functional transparent app:
http://forums.adobe.com/thread/476699
Setting systemChrome & transparency along with "backgroundAlpha" to "0" would have helped in Flex 3.
But, skinning of components in Flex 4 i.e Spark components is little different and completely customizable.
Following are the steps you need to do make the window transparent.
Set systemChrome to "none" in the XML configuration file
Set transparent to "true" in the XML configuration file
Copy the skin code from <SDK_FOLDER>\frameworks\projects\airframework\src\spark\skins\spark\S parkChromeWindowedApplicationSkin.mxml and paste in a new MXML file.
Set the "alpha" property of "backgroundRect" object inside the skin file to "0".
Assign the newly created skin as the "skinClass" for "s:WindowedApplication" object
Please import the attached FXP file using "File->Import Flex Project" menu and have a look at the code to make it much more clear.
First, I discovered it is easier to interact with app.XML by opening it via "Open With -> Text Editor".
Second, and this is really embarrassing, I had simply failed to remove the comments bracketing
was:
<!-- <systemChrome>none</systemChrome> -->
<!--<transparent>true</transparent>-->
should have been:
<systemChrome>none</systemChrome>
<transparent>true</transparent>
...duh! I knew better, but...
Lastly, for a completely chromeless app, add
showStatusBar="false"
to the app header.
that's it!
I'm using a gtk.Image widget to display a picture in a gtk window. I can set the image to be displayed before I call window.main(), but after I've done that the image won't change any more. Basically:
import pygtk
pygtk.require('2.0')
import gtk
(...)
window= Window()
window.canvas= gtk.Image()
window.window.add(sprite.window.canvas)
window.canvas.show()
window.canvas.set_from_file("pic1.gif")
window.main()
window.canvas.set_from_file("pic2.gif")
pic1.gif will be displayed. Is there a proper way of changing the image (I don't care if I have to use a widget other than gtk.Image)? All I can think of is destroying the window and creating a new one.
Edit:
I realized my mistake... I called window.main() for every window and any window's destroy event called gtk.main_quit(). Had to make slight adjustments, but it works now. Even after calling window.main() :)
As Rawing hasn't yet accepted his own answer, I'll post it to get this off the top of the unanswered questions page, and to help out anyone skimming this from a search engine clickthrough by providing a comprehensive answer. (Rawing, feel free to post your answer yourself, all the same.)
In your code, you're declaring window as Window(), as opposed to gtk.Window. If you're building in one window, you should not need to do this every time. Create the window once, add what you need to it. If you need additional windows, declare them separately in this module, and call them from code (instead of from main).
Furthermore, don't name your objects with a "window." at the beginning...that just gets overly confusing. Give it a simple name, add it where you need it. Python will do the rest.
A cleaned up version of your code above would probably look like this:
window = gtk.Window()
#You may need additional arguments above, such as to make it top level.
canvas = gtk.Image()
window.add(canvas)
canvas.show()
canvas.set_from_file("pic1.gif")
Now, just change the image in an event or another "def", like this:
def ChangePicture():
canvas.set_from_file("pic2.gif")
Canvas should update the picture automatically.
I got a TableView with a list of files in a directory. Now i want to add a colum with the file-thumbnails. How do i do this?
The icon of the file can be obtained by NSWorkspace's iconForFile:, see Apple doc on NSWorkspace.
To get the thumbnail, one uses one of the public function of the client side of QuickLook called QLThumbnailImageCreate, see Apple doc on QuickLook. Note that this is a CoreFoundation-type call, not a Cocoa method. If you're not used to CoreFoundation, read here.