The wxDC DrawEllipse function is used to draw an ellipse on a device context. It takes four parameters defining the coordinates of the ellipse's top-left corner, its width and height. It is part of the wxWidgets library, specifically the wxDC class.
Here are two examples of using wxDC DrawEllipse function:
Example 1: Drawing an ellipse on a panel
```c++ wxPanel* panel = new wxPanel(this, wxID_ANY); wxPaintDC dc(panel); dc.SetBrush(wxBrush(wxColour(255, 0, 0))); // set brush color to red dc.SetPen(wxPen(wxColour(255, 0, 0))); // set pen color to red dc.DrawEllipse(10, 10, 50, 30); // draw an ellipse at (10, 10) with width 50 and height 30
This code creates a panel and uses its device context to draw a red ellipse at coordinates (10, 10) with width 50 and height 30.
Example 2: Drawing random ellipses on a bitmap
c++
#include
#include
#include // for rand()
wxBitmap bitmap(100, 100);
wxMemoryDC memdc(bitmap);
memdc.SetBrush(wxBrush(wxColour(255, 255, 255))); // set brush color to white
memdc.Clear(); // clear the bitmap with white color
srand(time(NULL)); // seed the random number generator with the current time
for(int i = 0; i < 10; i++) {
memdc.SetBrush(wxBrush(wxColour(rand() % 256, rand() % 256, rand() % 256))); // set brush color to a random RGB value
memdc.DrawEllipse(rand() % 80, rand() % 80, rand() % 20 + 10, rand() % 20 + 10); // draw a random ellipse on the bitmap
}
wxImage image = bitmap.ConvertToImage(); // convert the bitmap to an image
image.SaveFile("random_ellipses.png", wxBITMAP_TYPE_PNG); // save the image to a file
```
This code creates a 100x100 bitmap and draws ten random ellipses on it using a memory device context. The ellipses have random colors and sizes. Finally, the bitmap is converted to an image and saved to a PNG file.
Overall, wxDC DrawEllipse function is a useful tool for drawing ellipses on device contexts in wxWidgets applications.
C++ (Cpp) wxDC::DrawEllipse - 24 examples found. These are the top rated real world C++ (Cpp) examples of wxDC::DrawEllipse extracted from open source projects. You can rate examples to help us improve the quality of examples.