Anyway to customize the icon drawing method in "CAknSingleGraphicStyleListBox"?

[jerrytian]

We want to make the icons displayed in "CAknSingleGraphicStyleListBox" control with various, smaller decoration icon on it according to the status of items.

So far I have tried two approaches:
1. Before provide the list box with an icon array, modify the content of the bitmaps in CGulIcon accordingly. I am having bad luck with this way.

2. Modify the default drawing behavior of the "CAknSingleGraphicStyleListBox". I have checked this wiki:
http://wiki.forum.nokia.com/index.ph..._a_list_box%3F
but it seems it can only affect the layout and text drawing of the listbox.

Any suggestion is welcomed.

[yogpan]

Hi,
It is possible to have your own icon displayed in the listbox. I think you are heading in right direction you will need to have cutomized Draw function where you can mention something like
TSize iconSize(iconRect.Width(),iconRect.Height());
AknIconUtils::SetSize(icon->iBitmap, iconSize);
AknIconUtils::SetSize(icon->iMask, iconSize);
aGc.BitBltMasked(iconRect.iTl, icon->iBitmap, TRect(TPoint(0,0), iconSize), icon->iMask, EFalse);
This is just an example you can implement it according to your needs.

[stenlik]

Hi,

you can override the drawer only (e.g. CDoubleLargeStyleItemDrawer or similar) or provide new set of icons as you have mentioned. All drawers are derived from the CListItemDrawer class, which have the method DrawItem(), which is responsible for drawing the whole line. This could be pretty difficult and you have to care also about the skins, selections, proper colors, etc. I did not find any drawer - in which you can override only the icon rendering...

I will personally start with providing the new icon array - this should work.

BR,
STeN

[jerrytian]

Thanks a lot.

I have tried further, with the following code, but it doesn't affect the icon drawn on the list.

//draw a "green donut" circle on the bitmap image.
CGulIcon *gulIcon = aAppInfo.iIcon;
CFbsBitmap* appIcon = gulIcon->Bitmap();
CFbsBitmap* appIconMask = gulIcon->Mask();

TSize appIconSize = appIcon->SizeInPixels();
TRect statusAreaRect(appIconSize.iWidth/2, appIconSize.iHeight/2, appIconSize.iWidth, appIconSize.iHeight);
TPoint statusAreaTopCenter(appIconSize.iWidth*3/4, appIconSize.iHeight/2);

CFbsBitmapDevice* bitmapDevice = NULL;
CFbsBitGc* bitmapGc = NULL;

bitmapDevice = CFbsBitmapDevice::NewL(appIcon);
bitmapDevice->CreateContext(bitmapGc);
bitmapGc->SetDrawMode(CGraphicsContext::EDrawModePEN);
bitmapGc->SetBrushStyle(CGraphicsContext::ESolidBrush);
bitmapGc->SetPenStyle(CGraphicsContext::ESolidPen);
bitmapGc->SetPenSize(TSize(2, 2));
bitmapGc->SetPenColor(TRgb(0x0000dd66, 0xff));
bitmapGc->DrawArc(statusAreaRect, statusAreaTopCenter, statusAreaTopCenter);

delete bitmapDevice;
bitmapDevice = NULL;
delete bitmapGc;
bitmapGc = NULL;

bitmapDevice = CFbsBitmapDevice::NewL(appIconMask);
bitmapDevice->CreateContext(bitmapGc);
bitmapGc->SetDrawMode(CGraphicsContext::EDrawModePEN);
bitmapGc->SetBrushStyle(CGraphicsContext::ESolidBrush);
bitmapGc->SetPenStyle(CGraphicsContext::ESolidPen);
bitmapGc->SetPenSize(TSize(2, 2));
bitmapGc->SetPenColor(TRgb(0x00000000, 0xff));
bitmapGc->DrawArc(statusAreaRect, statusAreaTopCenter, statusAreaTopCenter);

delete bitmapDevice;
bitmapDevice = NULL;
delete bitmapGc;
bitmapGc = NULL;

aAppInfo.iIconStatus = true;

Besides, the icon I try to modify is application's shoutcut icon retrieved by

AknsUtils::CreateAppIconLC(MAknsSkinInstance *aInstance, TUid aAppUid, TAknsAppIconType aType, CFbsBitmap *&aBitmap, CFbsBitmap *&aMask)

thus, they are mostly SVG based scalable graphics icon. Is there anything wrong to do with it?

[sriky27]

I would have opted the approach mentioned by stenlik, I would have a class derived from Item drawer and draw the icons of my size based on condition or set new icons to listbox based on conditions.