How to load gif using wxWidgets c++? - c++

Question

I need your help! Im currently really new to wxWidgets as a uni student. I am trying to load a .gif file using wxWidgets. I tried using the code below... but it only loads 1 frame, it doesn't move/ change to the other frames, it's basically a still picture. The file is .gif extension, and it has 3 frames or so. The location of the image is already correct. Help would be much appreciated!
Thank you
#include "ImageWindow.h"
#include <wx/stdpaths.h>
#include <wx/filename.h>
BEGIN_EVENT_TABLE(ImageWindow, wxWindow)
EVT_PAINT(ImageWindow::OnPaint)
END_EVENT_TABLE()
ImageWindow::ImageWindow(wxFrame *parent)
: wxWindow(parent, wxID_ANY)
{
this->SetBackgroundColour(wxColour(*wxWHITE));
wxImageHandler *gifLoader = new wxGIFHandler();
wxImage::AddHandler(gifLoader);
this->LoadPotatoBitmap();
}
ImageWindow::~ImageWindow()
{
delete potatoBitmap;
}
void ImageWindow::LoadPotatoBitmap()
{
wxStandardPaths &stdPaths = wxStandardPaths::Get();
wxString fileLocation = stdPaths.GetExecutablePath();
wxImage image(wxT("A:\\Projects\\TestGif\\Assets\\Kuning.gif"),
wxBITMAP_TYPE_GIF);
potatoBitmap = new wxBitmap(image);
}
void ImageWindow::OnPaint(wxPaintEvent &event)
{
wxPaintDC pdc(this);
if (potatoBitmap != nullptr)
{
pdc.DrawBitmap(*potatoBitmap, wxPoint(150, 100), true);
}
}

Answer 1

You are not specifying the index of the image in the constructor and that's why you see the default one as you can see in the wxWdigets documentation:
wxImage::wxImage ( const wxString & name,
wxBitmapType type = wxBITMAP_TYPE_ANY,
int index = -1
)
index Index of the image to load in the case that the image file contains multiple images. This is only used by GIF, ICO and TIFF handlers. The default value (-1) means "choose the default image" and is interpreted as the first image (index=0) by the GIF and TIFF handler and as the largest and most colourful one by the ICO handler.
But, you should also consider wxAnimationCtrl (see this sample)

Answer 2

Use wxAnimationCtrl for playing gif animations
or
Use extract each frame from the gif image and draw one by one using wxTimer.