On 05/17/12 20:27, Greg Ercolano wrote:
> On 05/17/12 11:56, Eugenio Bargiacchi wrote:
>> What do you suggest as a workaround for me while waiting on the next awesome
>> release? Is the Fl_Button method the only way?
>>
>
> I'd suggest derive your own class from Fl_Tree,
> and make a handle() method catch FL_PUSH and check for
> the right mouse, and if so, determine the item and then
> Fl_Tree::select() it, eg:
>
> int handle(int e) {
> switch (e) {
> case FL_PUSH:
> if ( Fl::event_button() == FL_RIGHT_MOUSE ) {
> Fl_Tree_Item *item = (Fl_Tree_Item*)find_clicked();
> if ( item ) {
> printf("*Right* click on item '%s'\n", item->label());
> select(item); // for example, select the
> item
> }
> }
> break;
> }
> return(Fl_Tree::handle(e));
> }
>
> Your tree callback can then check if Fl::event_button() is
> FL_RIGHT_MOUSE
> and act accordingly.
Oh, and I should have mentioned calling select(item) in the above
triggers your tree callback, which is why you can then add the
code you want to the tree callback.
Here's a compilable example using the above technique to show how
it enables right clicking to eg. select items, and how to have your
tree callback detect right clicks (see the ** RIGHT MOUSE ** message):
#include <stdio.h>
#include <FL/Fl.H>
#include <FL/Fl_Double_Window.H>
#include <FL/Fl_Tree.H>
#include <FL/Fl_Menu_Button.H>
class MyTree : public Fl_Tree
{
public:
MyTree(int X,int Y,int W,int H,const char*L=0):Fl_Tree(X,Y,W,H,L) {
}
int handle(int e) {
switch (e) {
case FL_PUSH:
if ( Fl::event_button() == FL_RIGHT_MOUSE ) {
Fl_Tree_Item *item = (Fl_Tree_Item*)find_clicked();
if ( item ) {
printf("*Right* click on item '%s'\n", item->label());
select(item); // for example, select the item
}
}
break;
}
return(Fl_Tree::handle(e));
}
};
// Tree's callback
// Invoked whenever an item's state changes.
//
void Tree_CB(Fl_Widget *w, void *data) {
Fl_Tree *tree = (Fl_Tree*)w;
Fl_Tree_Item *item = (Fl_Tree_Item*)tree->callback_item();
if ( ! item ) return;
switch ( tree->callback_reason() ) {
case FL_TREE_REASON_SELECTED: {
char pathname[256];
tree->item_pathname(pathname, sizeof(pathname), item);
if ( Fl::event_button() == FL_RIGHT_MOUSE )
{ fprintf(stderr, "** RIGHT MOUSE **: "); }
fprintf(stderr, "Tree_CB: Item selected='%s', Full pathname='%s'\n",
item->label(), pathname);
break;
}
case FL_TREE_REASON_DESELECTED:
fprintf(stderr, "Tree_CB: Item '%s' deselected\n", item->label());
break;
case FL_TREE_REASON_OPENED:
fprintf(stderr, "Tree_CB: Item '%s' opened\n", item->label());
break;
case FL_TREE_REASON_CLOSED:
fprintf(stderr, "Tree_CB: Item '%s' closed\n", item->label());
default:
break;
}
}
int main(int argc, char *argv[]) {
Fl_Double_Window win(250, 400, "Simple Tree");
MyTree tree(10, 10, win.w()-20, win.h()-20);
tree.callback(Tree_CB);
tree.add("Aaa/a-0001");
tree.add("Aaa/a-0002");
tree.add("Aaa/a-0003");
tree.add("Bbb/b-0001");
tree.add("Bbb/b-0002");
tree.add("Bbb/b-0003");
tree.end();
win.end();
win.resizable(win);
win.show(argc, argv);
return(Fl::run());
}
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