For QPushButton named "pushButtonShow" we can create a slot with this syntax and we do not need to explicitly create the connect expression
void on_pushButtonShow_clicked();
what would be the similar syntax for QSpinBox
When designing Qt Widget forms I recommend you to use Qt Form editor in Qt Designer or Qt Creator. In this editor you can simply right click the selected object, open context menu and choose Go to slot, that will create C++ slot in your selected form class.
Alternatively, the syntax is always the same, put in slots following
void on_<objectName>_<signalName>(<signal arguments>);
Related
I recently installed VS 2019 Preview, and i'm facing this issue:
In my VB code editor, in the navigation bar, when i try to choose a class (button, dropdowlist,...) it's not working: the list of classes it's not refreshing, the class i tried to select is not selected, so i can't be able to edit/create an event for the class i need to edit. I manually have to search for the event, or to create it manually.
Is it malfunction of the Editor? is it a bad configuration? or do i need to re-install VS 2019 ...?
Thanks in advance, looking forward for your comments on above.
I am not sure why your chose the Preview edition. I never used it. I have the latest VS 2019. In my version I can choose any control on the form in the middle drop down and the events for that control appear in the right drop down.
Another way to add the stub for an event procedure. Is available in Design View. Select a control and view the properties window. On the toolbar choose the lightning bolt. All the events for that control are listed. Double click on the event you want and the stub will be inserted in the code editor.
Of course, you can always just type in the event procedure, as long as it has the correct signature and handles clause, it will work.
I am making a chat application using XAML in UWP.The side panel is consisting of users. like this.
Everything is in Listbox in which I have this template that consists one ellipse as a circle which is like an indicator,one user image,textblocks and one toggle switch.I have to give states to the toggle switch in on the state it should change the green color of circle and make it red.
I want to give this functionality in code c# in MainPage.cs. I made the object of toggle in toggled Event Handler but I am not able to access the other elements inside the data template like ellispse,textblock.
What is the other alternative way of doing this?
NOTE: It has to be in listbox because I want to use the same template for every user.
The best way to do this would be to use data binding.
You would define a ViewModel class for the item, which would contain a bool property and would react to the toggling of the switch in the setter or have a Command which you would execute when the state event changes using behaviors.
If you really want the code as a event handler on main page, you have some options. To get the item associated with the toggle, you can use its DataContext property and cast it to the data type you are using. Alternatively, you can use Visual Tree Extesnions provided by the UWP Community Toolkit. This enables you to find the parent (probably Grid) where you store all the item controls and then manually find the user image, TextBlock, etc.
I am quite new to visual studio. Developed previously with vba.
Encountering a problem writing a language translation class.
The language dependent values are stored in a localdb table every row having formname , controlname and controlproperty as wel as a column per language.
The Language class Handles the translations at runtime. For forms I use a Sub FormUpdate(frm as Form) called from the form's load event as FormUpdate(Me) it checks the form's language kept in a custom parameter against the current language and updates the .text property of the controls on the form that are exposing some language specific text (Buttons, Labels, Tabcontrol etc..).
However I could not solve how to access and update the form's Tooltip component from the language class. (in vba it was easy as every control was exposing it's Controltiptext property)
In the form's class you would use MyTooltip.Settooltip(CtrlName,Text) but I could not figure out how to do that from another class (the tooltip component is not part of the form's controls - and I could not figure out nor find info how to do it) ??
Could someone advise pls?
I was so focused on finding a similar way to the one I used before that I did not see the easy way to resolve it - not yet enough accustomed to the new environment.
Sure, I am interested in an answer to my question but instead of making it too complicated using external components I'll do it the easy way by overloading the FormUpdate sub adding a sub with an extra parameter as Tooltip.
I am looking for a way to be able to use the tab control on my main form and transfer all 3 other forms onto that main form that has the tab control. Problem being is that some functions are named the same in each of the septate forms i want to bring into just one for the tab control.
Is there a way to separate the code for each form ON the main form of the tab control so i don't have to rename/recode each of the 3 forms i want to place on the main form of the tab control?
As an example:
Form1 has a function called upDateMe()
form2 has a function called upDateMe()
So now the main form would look like this:
Friend Class frmPW
Function sub upDateMe()
blah blah
End Function
Function sub upDateMe()
blah blah
End Function
so when i put both form1 and form2 code on the main form where the tab control is, its going to tell me that i have a duplicate function name.
Thanks for any help!
David
Why not add the what as a parameter to the update-sub?
I don't know what the functions are doing, but assuming that they load some data and bind Controls to it, you could provide a parameter that you can use to separate the logic/datasource.
Another possibility would be to simply rename the subs so that you can distinguish their purpose.
Last but not least you could encapsulate the whole business logic and databinding in one class/UserControl and instantiate it for every ex-form.
Consider User Controls.
There are plenty of examples available. You might want to start with this walkthrough on MSDN:
Walkthrough: Authoring a Composite Control with Visual Basic
One thing to watch for: The project type you'll create is actually 'Windows Forms Control Library', not 'Windows Control Library' like the 'Creating the Project' section, step 2 says.
You would create a User Control for each form in your project. Each of these UCs can be added to a tab on your main form and can be treated like any other standard Windows control.
For example - you can create a UC for your form1 called ctlForm1 and add it to Visual Studio's Toolbar. You can use the WinForm designer to drop an instance of your control in a tab page on your new main form and call it, say, ucForm1. To call the UC's upDateMe method you would simply call:
ucForm1.upDateMe()
You can thne create a UC for your form2, add it to your Toolbar and drop an instance of it on a different tab page on your main form (calling that instance ucForm2). You can call that control's upDateMe method like this:
ucForm2.upDateMe()
You'll want to learn about User Controls; they're a great way to encapsulate logic, events and UI elements into descrete, reusable components.
Hello
I am working in VB.Net 2.0 windows forms.
A color palette occurs on click of backcolor of any control. I want to add a new tab in this palette. In the new tab, I want to add the new colors as per the requirement.
The actual dialog is a private class named ColorUI, nested inside the System.Drawing.Design.ColorEditor class. That prevents you from altering it.
You'll need to create a complete replacement for this UITypeEditor derived class. You can get implementation hints on getting this right by using Reflector. Beware that you cannot override the [Editor] attribute on existing controls, your new version of the dialog will only be usable on your own custom controls.