I'm converting/re-writing one of my older programs, and I'm planning on using a function with PANEL* as a parameter. The thing is, I want to be able to access it from a button();. Is it possible to call a function from a button(); with parameters? I have a workaround in mind if it isn't, but I'm just checking before I do something redundant.

EDIT: according to the manual:

Quote:

---

Several buttons may share the same function. The number of the button is passed as the first parameter to the function (1 = first button), the panel pointer is passed as the second parameter.

---

does this mean that if I have a function with a PANEL* as a parameter (void blablabla(PANEL* _pan)), that it chooses the panel automatically?

yes, i guess it will be set automatically, but i always define button functions with 2 parameters - panel pointer and button_number

It doesn't work.

I'll just have to use the redundant method, I guess.

EDIT: Ugh! More trouble! My for loops (apparently) aren't organized correctly. I don't see what's wrong, though.

Code:

---

void scroll_menu_switch(PANEL* _pan)
{
	if(_pan.flags&= ~VISIBLE)
	{
		for(_pan.flags|= VISIBLE,_pan.scale_y= 0.005; _pan.scale_y < 1; _pan.scale_y+= 0.1 * time_step) wait(1);
	}
	else
	{
		for(_pan.scale_y; _pan.scale_y > 0.01; _pan.scale_y-= 0.1 * time_step) wait(1);
		_pan.flags&= ~VISIBLE;
	}
}

---

This is how I had the old wdl code before (pretty much the same idea):

Code:

---

function swap_gui_panel() // rolls up/down the GUI drop-down menus.
{
	//gui_dropdown.visible= (gui_dropdown.visible== off);
	//file_txt.visible= (file_txt.visible== off);
	if (gui_dropdown.visible== off)
	{
		file_txt.visible= on;
		gui_dropdown.scale_y= 0.01;
		gui_dropdown.visible= on;
		while(gui_dropdown.scale_y < 0.9)
		{
			gui_dropdown.scale_y+= 0.1 * time_step;
			wait(1);
		}
	}
	else
	{
		while(gui_dropdown.scale_y > 0.01)
		{
			gui_dropdown.scale_y-= 0.1 * time_step;
			wait(1);
		}
		file_txt.visible= off;
		wait(1);
		gui_dropdown.visible= off;
	}
}

---

I hate these brain-strains!

I've revised it, but I don't know how you can retrieve the button number on a panel.

Here's my Code:

---

#define OFF 0
...

int button_num,dummy;
...

void scroll_menu_down(PANEL* _pan)
{
	for(_pan.scale_y= 0.1,_pan.flags|= VISIBLE; _pan.scale_y < 0.9; _pan.scale_y+= 0.1 * time_step) wait(1);
}

void scroll_menu_up(PANEL* _pan)
{
	for(_pan.scale_y; _pan.scale_y > 0.1; _pan.scale_y-= 0.1 * time_step) wait(1);
}

void menu()
{
	dummy= (dummy== OFF);
	switch(button_num)
	{
		case 1:
			if(dummy== 0)
			{
				scroll_menu_down(gui_dropdown1);
			}
			else
			{
				scroll_menu_up(gui_dropdown1);
			}
		case 2:
			if(dummy== 0)
			{
				scroll_menu_down(gui_dropdown2);
			}
			else
			{
				scroll_menu_up(gui_dropdown2);
			}
		case 3:
			if(dummy== 0)
			{
				scroll_menu_down(gui_dropdown3);
			}
			else
			{
				scroll_menu_up(gui_dropdown3);
			}
		case 4:
			if(dummy== 0)
			{
				scroll_menu_down(gui_dropdown4);
			}
			else
			{
				scroll_menu_up(gui_dropdown4);
			}	
	}
}

---

I have no idea how to set this all up to work with the buttons.

I guess I should just give up trying to make my programming sleeker, if it's going to be more difficult than doing it the long way.

EDIT: Yay! with a little more revision, it works! Well, sort of. You have to click on one button at least once before you can open the menus. And the behavior of it is odd when you have multiple things open at one time (not that you'll need to ).

Code:

---

if(_pan.flags&= ~VISIBLE)

---

I guess you want to check if the VISIBLE flag is off. You should do it like this:
Code:

---

if((_pan.flags) & (~VISIBLE))

---

Or else it will reset the flag. Remember, if there is an "=" in there, it can change the flags.

Also, you should always initialize your variables. Maybe your problem ("You have to click on one button at least once before you can open the menus.") is related to this.

int button_num = 0, dummy = 0;

Essentially I do the same like you: panel calls one function for all buttons. This function then makes use of switch case or if (..){..};
My function looks like this:

void pnlPanClicked(var button_number,PANEL* pan) //select, which button was pressed on panel pan

{
if (button_number == 1)
{
scroll_menu_down(gui_dropdown2);
}
if (button_number == 2)
{
....
etc
}