From: Eric <er...@ma...> - 2009-02-16 19:20:42
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Hi all, In order to create a value of type TabPage, I need to create a value of type Bitmap. But how do I create such a value and what if I don't want to because I do not need my tabs to have images? Eric M |
From: Arne V. <ar...@me...> - 2009-02-17 08:33:39
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> Hi all, > > In order to create a value of type TabPage, I need to create a > value of > type Bitmap. But how do I create such a value and what if I don't want > to because I do not need my tabs to have images? > > Eric M Hello, to answer the first question: You can use, for instance, bitmap, bitmapCreateFromFile or bitmapFromImage (all Graphics.UI.WX.Media). bitmap returns Bitmap () while bitmapCreateFromFile returns IO (Bitmap ()). I guess what this means is that bitmap does not require the IO monad but you have little control over when it's executed. So bitmap should probably only be used if the file doesn't change over the lifetime of the application instance. To answer the second question: Maybe you could create an empty image. Regards, Arne Vogel |
From: Eric <er...@ma...> - 2009-02-17 18:21:02
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Arne Vogel wrote: > to answer the first question: You can use, for instance, bitmap, > bitmapCreateFromFile or bitmapFromImage (all Graphics.UI.WX.Media). > > bitmap returns Bitmap () while bitmapCreateFromFile returns IO > (Bitmap ()). > I guess what this means is that bitmap does not require the IO monad but > you have little control over when it's executed. So bitmap should > probably > only be used if the file doesn't change over the lifetime of the > application instance. > Thanks for the info. > To answer the second question: Maybe you could create an empty image. > How do I do that? Eric |