Am 09.03.2011 01:00, schrieb Rene Gollent:
On Tue, Mar 8, 2011 at 5:49 PM, Robert Stiehler <r.stiehler85@xxxxxxxxxxxxxx> wrote:is there a way to get knowledge about with which mouse button a BPictureButton was clicked (left or right mouse button (maybe event by keyboard))?In order to detect that, you'll need to get at the message which triggered the mouse down event. i.e. by overriding BPictureButton's MouseDown and doing something like the following: void CustomPictureButton::MouseDown(BPoint point) { BMessage *message = CurrentMessage(); int32 buttons = 0; if (message->FindInt32("buttons",&buttons) == B_OK) { switch(buttons) { case B_PRIMARY_MOUSE_BUTTON: { // left click } break; case B_SECONDARY_MOUSE_BUTTON: { // right click } break; case B_TERTIARY_MOUSE_BUTTON: { // middle click } break; } } BPictureButton::MouseDown(point); }
The buttons int32 is a bit mask. Therefor the code is more future proof like this:
BMessage* message = CurrentMessage();
int32 buttons = 0;
if (message->FindInt32("buttons", &buttons) == B_OK) {
if ((buttons & B_PRIMARY_MOUSE_BUTTON) != 0) {
// ...
}
if ((buttons & B_SECONDARY_MOUSE_BUTTON) != 0) {
// ...
}
// ...
}
At the moment, the input_server or app_server (don't remember which)
will, to comply with BeOS behavior, not generate another mouse down
event when the user presses additional buttons while already holding one
button. However, the additional buttons will appear in the MouseMoved()
message buttons field. So depending on where such a switch block appears
in an application's code, it might not work as expected.
Best regards, -Stephan
