I need to create a view like this in Qt
If I click the circle then it'll give a popup message like this "You clicked 2 circle."
I need to add the circle during run time in any location. How to implement this in Qt using QGraphicsView? Or are there any other better way to implement this?
The following page from Qt documentation can help you: http://doc.qt.io/qt-5/graphicsview.html
The Drag and drop example will help you to know how deals with your QGraphicItems
Hope that helps
Related
i'm programming a Qt Quick application and I'm looking for a possibility to display the user errors. In Qt widgets there is QMessageBox but i can not find any equivalent to this in Qt Quick.
Sure i can create a MessageBox by myself but I can't imagine that there is no given possibility?
I found an ebook on the official site here and there is an Dialog described on page 67 but it doesn't work anymore and i can't find any further information about that. Is it dropped in the current version?
Thanks in advance
There is no Qt-Quick component for this yet. What I do in my application is using the Window QML component. I set the modality property to Qt.WindowModal to have it as a modal Window. You can then use the Button component to create OK/Cancel buttons.
Another thing I do is create these modals dynamically when something wrong occurs using Qt.createComponent() in QML.
Edit: Just discovered a new Dialog component that will be released in Qt5.2 that seems to match what you are looking for: MessageDialog
I am trying to develop a functionality using Qt which I don't know whether it is possible to implement. Here is the requirement:
When the user hovers over a node (an object derived from QGraphicsItem), a window will be shown near the node, in the window there might be some histograms or buttons that can be clicked to show further information. When the mouse leaves the window, it will automatically close.
I tried to use a tooltip, because it can pop-up near the node and close when the mouse leaves it, but it can only show text. So, it still cannot work that way. I am wondering if there is another way to do this? I did lots of google search, but there is still no answer.
Thanks so much for helping me with this.
If you're ok with using a 3rd party library, Qxt provides a class that provides a tooltip that is QWidget based, which will let you use an arbitrary widget as the tooltip rather than just text.
See: Qxt::ToolTip
you don't have to use tooltip for your app
you can use or call widget or dialog, on hover mouse event
Please refer Qt Example EmbeddedDialog Example, It is advanced, But you can understand how hover Enter/Leaving events are working. I personally prefer don not create instance of Popupdialog for each item, create it if only nesessary. Otherwise create one dialog and pass its reference to all the items through the constructor initialization.
1. These are the API you are intrested on, reimplemet this.
QGraphicsItem::hoverEnterEvent(QGraphicsSceneHoverEvent *event) and void QGraphicsItem::hoverLeaveEvent(QGraphicsSceneHoverEvent *event)
2. When You create Dialog, You can pass Qt::WindowFlags as Qt::ToolTip.
I have a Qt project where I'm using QGraphicsView framework, also I have popup windows on the scenes. (QDialogs)
When someone clicks on a certain button a popup window appears, and I'm invoking it with the .exec() method instead of .show() to make it the active one. Also I want to give it a visual effect like lightbox provides for html pages, so it would be obvious for the user too, that the background window won't communicate. Do you know any simple solution to make it work? or is it hard to implement in Qt?
EDIT: I don't know if it's obvious of not, but it's a desktop application, not a web application.
Just create QFrame over necessary area with customized background and transparency. For animation effect you may use QPropertyAnimation + QGraphicEffects and other stuff from qt animation framework.
Now I found another way to accomplish what I wanted. Like this:
QWidget* mytranswidget = new QWidget(mybgwidget);
mytranswidget->setStyleSheet( "background:transparent; background-color:rgba(0,0,0,95)");
mytranswidget->setWindowFlag(Qt::FramelessWindowHint);
mytranswidget->setGeometry(mybgwidget->rect());
mytranswidget->show();
I'm doing it at the beginning of my popup widget's constructor so it's being drawn before draw my popup, so it will be shown in the right order.
I have just completed my first Qt 5 project and I want to add an About dialog. Is there a default, and how do you use it? If not, what's the best way to add one and edit it and display its content using the Help menu action? Any help would be appreciated. Thanks in advance.
The way to add a dialog to your project depends a little bit on what development environment you are using. You can always use QtDesigner (part of Qt) to design your About dialog and then add it to your project. To display it, just call the exec() function of the QDialog class in a slot connected to the triggered() signal of your About QAction object.
i am wondering if there is a way to skin the whole drop down box, after searching Google i could only find thing like adding icons resizing and alike, but no full skinning of the box.
Is this at all possible and if so how? i would very much like my whole program to be skinned rather than everything but the drop down boxes.
I am more of a designer than a coder so as far as code goes I'm quite a novice with the code side, would be a great help if you could give me a point in the right direction and/or a quick insight how to do it.
in flex... sorry
Thanks.
i am wondering if there is a way to skin the whole drop down box,
Yes, create a custom skin class for the DropDownList, just like you would any other Spark class. You can use code for the DropDownListSkin as a reference point for creating your own. In Flash Builder, if you create a new MXML Skin; and specify the hostComponent as a DropDownList then you'll get the DropDownListSkin code as a starter point for your customization.
For more info, read these docs on skinning Spark Components.
We did, in essence, exactly this to create our Mobile DropDownList.