Gadgets and FreeGadget

[jak64]

Gadgets and FreeGadget

Hello everyone,

I would like to have your opinion on a question that I ask myself. For this, I will take an example to explain myself. It is just an example, it has nothing to do with what I want to do.

Let's imagine that I write a program, with on the left of the screen, several buttons. A "Trees" button, an "Animals" button, a "Fruits" button, etc...

By clicking, for example, on the "Trees" button, I display pictures of trees in ImageGadget(), there is a quantity that I do not know.
Likewise, if I click on the "Animals" button, I display pictures of animals in ImageGadget().

My idea is to dynamically create the ImageGadet() each time and then free them (Freegadget()).

The question I ask myself is this.

Doesn't creating and freeing (FreeGadget()) risk saturating the computer's memory after a while?

[Fred]

No, it shouldn't.

[Bisonte]

Create an ImageGadget and use SetGadgetState() to add a new image every time.
This way you do not need to create a new gadget for each image. Use dynamically
created images (or load them with #PB_Any as number) and release them after use.
That would be the normal procedure.

And to the main question:
No, it should have no effect on the total memory of the computer.
The operating system should take care of these things.
Unless you forget to free something

[jak64]

Hello Fred and Bisonte,

Thanks for your answers.

To answer Bisonte, of course, I can create the gadgets and reuse them with SetGadgetState(), but I don't know the number of images to display, so I would have to create a certain number of ImageGadget without being sure to have created enough.

[BarryG]

Doesn't creating and freeing (FreeGadget()) risk saturating the computer's memory after a while?

No; in fact that's the total opposite. Freeing it before recreating is the best way to not saturate your PC's memory.

Fun Fact: You don't even need to free a gadget if you recreate it with the same gadget number, because PureBasic will free it automatically.

[jak64]

Hello BarryG

Thanks, I didn't know that recreating it with the same number automatically frees it, but in my case I create them with #pb_Any, and as I mentioned, I don't know the number to create (100, 200, 500, 1000?)

[mk-soft]

With #PB_Any you must explicitly call FreeGadget.

[jak64]

thanks mk-soft

[mk-soft]

Alternatively, create a CanvasGadget yourself and draw a grid with the images.
Display the CanvasGadget in the size of the window and mathematically redraw only the images that fit into the window.

[jak64]

Hello mk-soft,
I opted for a scrollarea in which I add as many gadgets as necessary and it works very well like that.

However, I just made another post, because I noticed that, if we use a scrollarea in which we put canvasgadgets, then the mouse wheel does not work to scroll vertically!

[Axolotl]

@jak64,
As I showed in the other post, the behavior is logical and understandable, because both gadgets can receive the mouse wheel event.

[jak64]

OK, Thanks Axolotl