Image in cell of wxGrid? Topic is solved

[Elmi]

After Google sends me to wxPython pages only (where functions are used that do not exist in native wxWidgets) I'll try it here:

I want to create a small grid with an image in the first cell of each column (that reacts on double-click) and a label in the second cell of each column (which simply shows the name of the image in first cell). So that's nothing more than a small icon and its name per every row.

My question: how do I draw an image within a cell of a wxGrid? Or: is it totally oversized to use a wxGrid here?

Elmi

[tan]

Hi,
i think it is better to use wxListCtrl for that.

[Auria]

Or you could create a new cell renderer that renders images :
http://docs.wxwidgets.org/stable/wx_wxg ... llrenderer

[Mojo]

...

My question: how do I draw an image within a cell of a wxGrid? .....

Elmi

As Auria pointed, you should create a new cell renderer that renders images. It goes something like this:

Code: Select all

class myImageGridCellRenderer : public wxGridCellStringRenderer
{
public:
	virtual void Draw(wxGrid& grid, wxGridCellAttr& attr, wxDC& dc, const wxRect& rect, int row, int col, bool isSelected)
	{
		wxGridCellStringRenderer::Draw(grid, attr, dc, rect, row, col, isSelected);
		
		wxImage cellImage;
		
		if (cellImage.LoadFile(wxT("myimage.jpg")))
		{
			wxBitmap cellBitmap(cellImage);
			dc.DrawBitmap(cellBitmap, rect.x, rect.y);
		}
		else 
		{
			wxLogError(_T("The myimage.jpg, in cell:\n row '%d', column '%d',\n didn't load, does it exist?"), row, col);
			grid.SetCellValue(_T("Here's should be an image"), row, col);
		}
	}
};

Then you could set in the cell you need your renderer:

Code: Select all

m_grid1->SetCellRenderer(0, 0, new myImageGridCellRenderer);

[JimFairway]

Hi Mojo,

I agree with the approach, I have drawn many an image in a grid cell.

Only thing I see with your post:

Code: Select all

                else
                {
                        wxLogError(_T("The myimage.jpg, in cell:\n row '%d', column '%d',\n didn't load, does it exist?"), row, col);
                        grid.SetCellValue(_T("Here's should be an image"), row, col);
                }

Is that if there really isn't an image, I think you would have an infinite loop.
SetCellValue() will cause the cell to refresh, which will call the renderer, which would fail again, then call SetCellValue... perhaps best just to render a big X or something?

Jim

[Mojo]

Hi Mojo,

I agree with the approach, I have drawn many an image in a grid cell.

Only thing I see with your post:

Code: Select all

                else
                {
                        wxLogError(_T("The myimage.jpg, in cell:\n row '%d', column '%d',\n didn't load, does it exist?"), row, col);
                        grid.SetCellValue(_T("Here's should be an image"), row, col);
                }

Is that if there really isn't an image, I think you would have an infinite loop.
SetCellValue() will cause the cell to refresh, which will call the renderer, which would fail again, then call SetCellValue... perhaps best just to render a big X or something?

Jim

Thanks Jim, I knew that, it was just an example, instead of wxLogError and SetCellValue is't possibly to use any instruction.