How to draw some text when click a button in wxWidgets?

How to draw some text when click a button in wxWidgets?

By : user3100404
Date : January 12 2021, 07:00 PM
will help you You must use wxPaintDC when drawing in your wxEVT_PAINT handler, not wxClientDC. While wxClientDC also "works", at least for now and at least under some platforms, this is definitely not the right way to do it.
When using wxPaintDC, Refresh() would work as expected and will result in a call to your paint handler during the next event loop iteration. Normally you don't need to call Update(), which immediately calls your handler, at all.
code :

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WxWidgets draw a bitmap with opacity

WxWidgets draw a bitmap with opacity

By : Gabriel Braga
Date : March 29 2020, 07:55 AM
will be helpful for those in need How can I draw a wxImage, or wxBitmap to a DC with opacity? It looks like its not possible with the standard DC or with wxGraphicsContext.
code :
void YourCustomWindow::OnPaint( wxPaintEvent& event ) {
  wxPaintDC dc(this);
  wxImage image( width, height ); 
  unsigned char* imgdata = img.GetData();
  unsigned char* imgalpha = img.GetAlpha();

  // manipulate raw memory buffers to populate
  // them with whatever image you like.
  // Putting zeros everywhere will create a fully
  // transparent image.

     // almost done, but not quite... 
     // wxDC can only draw wxBitmaps, not wxImage,
     // so one last step is required
  wxBitmap bmp( image );
  dc.DrawBitmap( bmp, 0, 0 );
How to add text field with button when click on Add(+) button, again click new added button add one more fields in andro

How to add text field with button when click on Add(+) button, again click new added button add one more fields in andro

By : ak47
Date : March 29 2020, 07:55 AM
I wish this helpful for you i am suffering from last one week with this problem. I have one row with EditText text field, setTime button, and Addmore button. Now when i click setTime button open dialod and set time, it will displayed in text field. After this click on Addmore button then create new row same like above and when click setTime button again add time into text field. Now click on Addmore button it will create another row like above with same functionality. I did when click on setTime button it will add to text Field. now i want to click Addmore button it will create new row like above with same fuctionality with the set time and add more button. I did set time code. , i found very good example...this resolved my problem
code :
How to draw after button click?

How to draw after button click?

By : Michal Kravcenko
Date : March 29 2020, 07:55 AM
will be helpful for those in need If I understood you right, you could have a boolean variable and set it to true when you click the button... something like:
code :
private bool _buttonClicked = false;

void myButton_Click(object sender, EventArgs e)
   _buttonClicked = true;
   this.Invalidate(); // <-- invalidate the form so it's repainted
   this.Update(); // <-- optional: force a synchronous repaint

protected override void OnPaint(PaintEventArgs e)

    if(!_buttonClicked) return;

    // this will only happen after button is clicked
    var cp = new Point(Width / 2, Height / 2);
    DrawGradientCircle(e.Graphics, cp, 100);
How to click a Button in wxWidgets handler OnClose?

How to click a Button in wxWidgets handler OnClose?

By : K Mohanta
Date : March 29 2020, 07:55 AM
I hope this helps . I have a handler for the close button (upper right corner) in a dialog and a handler for an addition button inside the dialog. My custom button has wxID_CANCEL as ID. The handler OnClose should execute the handler OnButtonCancel. What happens: it closes the dialog and the app, because the dialog is in a overwritten wxApp:OnInit. But OnButtonCancel is not executed. , I think I have found the bug:
code :
// wrong: don't use ProcessEvent of wxDialog
// this->ProcessEvent(event_button_clicked);

// right: use ProcessEvent of the custom wxButton
Use standard Window to draw with wxWidgets into?

Use standard Window to draw with wxWidgets into?

By : HeartRocker
Date : September 21 2020, 07:00 PM
wish help you to fix your issue You can use wxNativeContainerWindow to create a wxTopLevelWindow representing the foreign HWND you're given and then use it as the parent for all your other windows.
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