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Re: Help needed. [message #27337 is a reply to message #27331]

Tue, 13 July 2010 00:21

koldo
Messages: 3361
Registered: August 2008

Senior Veteran

281264 wrote on Mon, 12 July 2010 18:28

Hi,

I am struggling with this dummy application I am creating. The objective is to draw lines in the application�s screen after the user has selected �line� by clicking in its corresponding button.

Allow me to explain what I have done:

1.- I have created a struct containing a menu with three buttons-only button �line� does something.
2.- I have added a SplitterFrame and put the previous struct in its left. This allows me to have the application�s window for drawing.
3.- Functionality: once the user has selected �line� from the menu the screen shows mouse coordinates. Then the user clicks again and anchors one point of the line; after a second click the line is drawn on the screen; so far so good.
4.- However, in the next steps, I am finding some problems:
a.- the last coordinates remains in the screen after line creation process; how to get rid off it?
b.- My intention is to store all the lines in a container, so they can be redraw every time is needed. So far, I am using C++ vectors. I have created a struct �line- for contain lines (with four variables). The first problem arises when I try to create a line in my application: it does not compile. Second is the usage of vectors or U++ vectors. What to use? In general, is it allow to use the STL in U++?.

Many thanks,

Javier

Hello Javier

1. I have renamed "line" struct to "myline". line name seems not to be good for a struct.

4.a I have added this to handle mouse up:

void ejemplo_splitter::LeftUp(Point p,dword d) {
	if(!ended) {
		ended = 1;
		Refresh();
	}
}

And Paint begin like this:

void ejemplo_splitter::Paint(Draw& draw)
{
	draw.DrawRect(GetSize(),White());

now it works.

4.b About vectors or other containers I use U++ ones. Read for example this http://www.ultimatepp.org/srcdoc$Core$NTLvsSTL$en-us.html or this http://www.ultimatepp.org/srcdoc$Core$Tutorial$en-us.html

Attachment: ejemplo_splitter.7z
(Size: 1.50KB, Downloaded 143 times)

Best regards
Iñaki

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