Maybe using a grid might be an option. Regards Pete
On Sat, 2008-09-06 at 10:13 +0200, Tomas Eroles i Forner wrote: > Ok, it seems to work fine. > I can draw all the board without problems, but I have yet some > questions: > > I'm drawing the board after a menu command. If after the drawing the > board I click on Maximize button, the board is erased and I have to draw > it another time. How can I solve that? > > Other question: the board is a 15x15 matrix, drawn by rectangles, and I > would like to work with each rectangle, because I would like to paint > some of them depending on their position (it will be stored on a file or > on a database). Is possible to refer to a rectangle after it has been > drawn? That is, may I draw all the rectangles and after that, while > reading a file (or a table) put some colour on them (background property > perhaps)? > > Thanks in advance for your answers, guys > > > El dv 05 de 09 del 2008 a les 11:59 +0200, en/na Benoit Minisini va > escriure: > > On vendredi 05 septembre 2008, Doriano Blengino wrote: > > > Werner ha scritto: > > > > Tomas Eroles i Forner wrote: > > > >> commands in a Draw.Begin(DrawingArea)...Draw.End group of code. > > > >> > > > >> It seems to work, but, I see that you can start drawing if you put a > > > >> command button, or a menu or something like this, but it does not work > > > >> in a Form_Open event. > > > >> > > > >> Is it like this? > > > > > > > > However, it is much more practical to use the drawing area's draw event > > > > http://gambasdoc.org/help/comp/gb.qt/drawingarea/.draw > > > > > > > > because it will also deal with needs to redraw that come from outside > > > > the > > > > application i.e.other applications' windows that were partially > > > > overlapping. Have a look at the "Analog Watch" example. > > > > > > Werner is right but, perhaps, you can still get what you want if you set > > > the "Cached" property of the DrawingArea. > > > By setting that property, the DrawingArea repaints automatically itself > > > when needed; whether to go this way or the other depends on several > > > factors: dimension of the drawing, complexity of the drawing, complexity > > > of the code needed to remember what to draw... > > > > > > I suppose that the main difference between the two methods is this. If > > > you use the Cached property, your code can update the drawing when it > > > wants; the result is a cached bitmap that can consume a lot of memory, > > > but still is a simple bitmap. This is the easiest way. If you don't use > > > the Cached property, your code to update the drawing is called every > > > time the DrawingArea "unveals". If this code is fast, then this method > > > is better. However, this second method is a little more complicated to > > > understand: when the program, asynchronously, wants to change the > > > appearance, it can Draw() directly, > > > > You cannot draw directly on a DrawingArea if it is not cached (even if it > > actually allowed at the moment). > > > > Drawing must be done inside the Draw event only. > > > > If you need to refresh the DrawingArea, you must call its Refresh() method. > > > > When the DrawingArea is cached, it maintain a pixmap cache (like a Picture > > object), so you can draw inside it whenever you want. > > > > Regards, > > > > > ------------------------------------------------------------------------- > This SF.Net email is sponsored by the Moblin Your Move Developer's challenge > Build the coolest Linux based applications with Moblin SDK & win great prizes > Grand prize is a trip for two to an Open Source event anywhere in the world > http://moblin-contest.org/redirect.php?banner_id=100&url=/ > _______________________________________________ > Gambas-user mailing list > Gambas-user@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/gambas-user > ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ Gambas-user mailing list Gambas-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/gambas-user
