static void new_position(GuiObject *slid, int pos_neg)
{
int old_position;
check_object(slid, "slid", "new_position");
old_position = slid->position;
if (pos_neg < -1)
slid->position -= slid->length;
else if (pos_neg < 0)
slid->position--;
else if (pos_neg > 1)
slid->position += slid->length;
else if (pos_neg > 0)
slid->position++;
if (slid->position < 0)
slid->position = 0;
if (slid->position > slid->slider_length - slid->length)
slid->position = slid->slider_length - slid->length;
if (old_position != slid->position) {
show_slider(slid);
slid->object_callback(slid, slid->u_data);
}
}
void scroll_bar::
set_length (
unsigned long length
)
{
// make the min length be at least 1
if (length == 0)
{
length = 1;
}
auto_mutex M(m);
parent.invalidate_rectangle(rect);
if (ori == HORIZONTAL)
{
rect.set_right(rect.left() + length - 1);
rect.set_bottom(rect.top() + width_ - 1);
// if the length is too small then we have to smash up the arrow buttons
// and hide the slider.
if (length <= width_*2)
{
b1.set_size(length/2,width_);
b2.set_size(length/2,width_);
}
else
{
b1.set_size(width_,width_);
b2.set_size(width_,width_);
// now adjust the slider
if (max_pos != 0)
{
slider.set_size(get_slider_size(),width_);
}
}
}
else
{
rect.set_right(rect.left() + width_ - 1);
rect.set_bottom(rect.top() + length - 1);
// if the length is too small then we have to smush up the arrow buttons
// and hide the slider.
if (length <= width_*2)
{
b1.set_size(width_,length/2);
b2.set_size(width_,length/2);
}
else
{
b1.set_size(width_,width_);
b2.set_size(width_,width_);
// now adjust the slider
if (max_pos != 0)
{
slider.set_size(width_,get_slider_size());
}
}
}
// call this to put everything is in the right spot.
set_pos (rect.left(),rect.top());
if ((b2.get_rect().top() - b1.get_rect().bottom() - 1 <= 8 && ori == VERTICAL) ||
(b2.get_rect().left() - b1.get_rect().right() - 1 <= 8 && ori == HORIZONTAL) ||
max_pos == 0)
{
hide_slider();
}
else if (enabled && !hidden)
{
show_slider();
}
}
void press_slider(GuiObject * slid)
{
GuiWindow *win;
GuiWinThread *win_thread;
int position, old_x, old_y;
int x, y;
int old_position = 0, on_bar = FALSE;
check_object(slid, "slid", "press_slider");
win = slid->win;
check_window(win, "press_slider");
win_thread = win->win_thread;
old_x = slid->x;
old_y = slid->y;
x = mouse.x - win->x;
y = mouse.y - win->y;
if ((slid->type == HOR_SLIDER && /* on slider bar? */
x >= slid->x + slid->position &&
x <= slid->x + slid->position + slid->length) ||
(slid->type == VERT_SLIDER &&
y >= slid->y + slid->slider_length - slid->position - slid->length &&
y <= slid->y + slid->slider_length - slid->position)) {
old_x = x;
old_y = y - slid->slider_length;
old_position = slid->position;
on_bar = TRUE;
}
if (!on_bar && (slid->type == HOR_SLIDER || slid->type == VERT_SLIDER)) {
if (slid->type == HOR_SLIDER) {
if (x > slid->x + slid->position)
move_slider(slid, 2);
else
move_slider(slid, -2);
}
if (slid->type == VERT_SLIDER) {
if (y > slid->y + slid->slider_length - slid->position)
move_slider(slid, -2);
else
move_slider(slid, +2);
}
return;
}
do {
usleep(sleep_time);
do_window_functions(win_thread);
if (GuiGetMessage() == GuiMouseEvent) {
move_mouse();
x = mouse.x - win->x;
y = mouse.y - win->y;
position = old_position;
if (slid->type == HOR_SLIDER || slid->type == NICE_HOR_SLIDER)
position += x - old_x;
else
position += slid->slider_length - (y - old_y);
if (position > slid->slider_length - slid->length)
position = slid->slider_length - slid->length;
if (position < 0)
position = 0;
slid->position = position;
show_slider(slid);
slid->object_callback(slid, slid->u_data);
}
}
while (GuiMouseGetButton() == GuiMouseLeftButton);
/* check for double click on slider bar */
if (on_bar)
check_double_click(slid);
}
