[SOLVED]Start Drag from GeUserArea
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On 07/06/2017 at 13:57, xxxxxxxx wrote:
I don't success to get it to work properly. The main issue is I don't know when to start drag event. Same for end it. So for exemple it didn't make the difference beetween a simple click and a drag event.
Moreover kills event doesn't seem to work.
Here is an exempleimport c4d class Area(c4d.gui.GeUserArea) : xValue = 0 yValue = 0 def DrawMsg(self, x1, y1, x2, y2, msg) : self.DrawSetPen(c4d.Vector(.2)) self.DrawRectangle(x1, y1, x2, y2) def drag_message(self, msg, result) : bc_click = c4d.BaseContainer() self.GetInputState(c4d.BFM_INPUT_MOUSE, c4d.BFM_INPUT_MOUSELEFT, bc_click) mousex = bc_click.GetLong(c4d.BFM_INPUT_X) mousey = bc_click.GetLong(c4d.BFM_INPUT_X) self.MouseDragStart(c4d.KEY_MLEFT, mousex, mousey, c4d.MOUSEDRAGFLAGS_DONTHIDEMOUSE | c4d.MOUSEDRAGFLAGS_NOMOVE) mx = mousex my = mousey drag_result, dx, dy, channels = self.MouseDrag() first = True drag = False while drag_result == c4d.MOUSEDRAGRESULT_CONTINUE: drag = True if first: print 'Start' first = False mx += dx my += dy if dx==0.0 and dy==0.0: drag_result, dx, dy, channels = self.MouseDrag() continue self.KillEvents() #Don't work drag_result, dx, dy, channel = self.MouseDrag() print "Mouse Dragging at position [%f,%f]" % (mx, my) if self.MouseDragEnd() == c4d.MOUSEDRAGRESULT_FINISHED and drag: print "Mouse Dragging Ended: ", self.MouseDragEnd() return def Message(self, msg, result) : self.drag_message(msg, result) if msg.GetId() == c4d.BFM_INPUT: print 'clicked' return c4d.gui.GeUserArea.Message(self, msg, result) class MyDialog(c4d.gui.GeDialog) : def __init__(self, area) : self.area = area def CreateLayout(self) : self.SetTitle("My UserArea") self.AddUserArea(1000, c4d.BFH_SCALEFIT|c4d.BFV_SCALEFIT) self.AttachUserArea(self.area, 1000) self.GroupEnd() return True def main() : area = Area() dialog = None dialog = MyDialog(area) dialog.Open(dlgtype=c4d.DLG_TYPE_MODAL_RESIZEABLE, defaultw=500, defaulth=500) if __name__=='__main__': main()As you could see if you click its also print you drag. Hope you understand my problem ^^'. Who is Get the start of a drag event and get the end of a drag event. Like that in the Message function I can do if START_OF_DRAG : self.drag_message, and if END_OF_DRAG : print 'end'
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On 08/06/2017 at 03:25, xxxxxxxx wrote:
To check for a drag event the solution is to simply use MouseDragStart()/MouseDrag()/MouseDragEnd().
Instead of Message(), move the mouse dragging into InputEvent().
Then to check if the started drag processing was just a click add this condition at the beginning of the while dragging loop:if bc_click[c4d.BFM_INPUT_VALUE] == 0: breakThis condition exits the loop whenever the mouse left button is released. Then check if the mouse was really moved or if it was just a mouse click.
Finally, I don't think KillEvents() is useful here if it's called inside the while dragging loop.
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On 08/06/2017 at 04:40, xxxxxxxx wrote:
Thanks you sadly I didnt succes to get the click evaluated properly.
import c4d class Area(c4d.gui.GeUserArea) : def DrawMsg(self, x1, y1, x2, y2, msg) : self.DrawSetPen(c4d.Vector(.2)) self.DrawRectangle(x1, y1, x2, y2) def InputEvent(self, msg) : mousex = msg[c4d.BFM_INPUT_X] mousey = msg[c4d.BFM_INPUT_Y] self.MouseDragStart(c4d.KEY_MLEFT, mousex, mousey, c4d.MOUSEDRAGFLAGS_DONTHIDEMOUSE | c4d.MOUSEDRAGFLAGS_NOMOVE) mx = mousex my = mousey while True: if msg[c4d.BFM_INPUT_VALUE] == 0: break result, dx, dy, channels = self.MouseDrag() if result!=c4d.MOUSEDRAGRESULT_CONTINUE: break #If we don't move that mean we clicked' if not dx or not dy: print 'clicked' else: mx += dx my += dy print "Mouse Dragging at position [%f,%f]" % (mx, my) end_state = self.MouseDragEnd() if end_state == c4d.MOUSEDRAGRESULT_ESCAPE: print "Escaped" elif end_state == c4d.MOUSEDRAGRESULT_FINISHED: print 'Mouse Drag End' return True class MyDialog(c4d.gui.GeDialog) : def CreateLayout(self) : self.area = Area() self.AddUserArea(1000, c4d.BFH_SCALEFIT|c4d.BFV_SCALEFIT) self.AttachUserArea(self.area, 1000) return True def main() : dialog = MyDialog() dialog.Open(dlgtype=c4d.DLG_TYPE_MODAL_RESIZEABLE, defaultw=500, defaulth=500) if __name__=='__main__': main()As you could see, the first tick is always drag (dx and dy are not equal to 0) even if you don't move the mouse.
Moreover I would like to ask is there a way for changing mouse icon? For exemple I would like to change it when she is outside of my GeUserArea.
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On 08/06/2017 at 08:14, xxxxxxxx wrote:
Sorry my first post was missing information.
MouseDrag() has to be called first in the loop for each drag event. Then the current input state for the mouse left button has to be retrieved before checking c4d.BFM_INPUT_VALUE.
So the dragging loop would be:mx = mousex my = mousey state = c4d.BaseContainer() while True: result, dx, dy, channels = self.MouseDrag() if result == c4d.MOUSEDRAGRESULT_ESCAPE: break if not self.GetInputState(c4d.BFM_INPUT_MOUSE, c4d.BFM_INPUT_MOUSELEFT, state) : break if state[c4d.BFM_INPUT_VALUE] == 0: print "Released Left Mouse" break if dx == 0 and dy == 0: continue mx += dx my += dy print "Mouse Dragging at position [%f,%f]" % (mx, my)state[c4d.BFM_INPUT_VALUE] gives the mouse left button clicked state. So this allows to check when the mouse button has been released.
If the mouse position hasn't changed then no dragging should be processed.You can change the mouse icon with gui.SetMousePointer().
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On 08/06/2017 at 09:38, xxxxxxxx wrote:
Thanks you. Tested and solved !
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On 09/06/2017 at 00:54, xxxxxxxx wrote:
Sorry to bump this thread but is there a way for start drag from a GeUserArea and recieve drop message from TreeViewCustomGui? Or at least is it possible to send message to this TreeViewCustomGui? Or a timer?
Just tell me yes or no
Cause I think I must do the following thing but I prefer ask if there is no other way before ^^
Make my timer function into my GeDialog who call a custom timer function inside my TreeView -
On 09/06/2017 at 02:29, xxxxxxxx wrote:
GeUserArea.HandleMouseDrag() is missing in the Python API so it would be really difficult and hacky to send drag and drop data to other gadgets.
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On 09/06/2017 at 02:46, xxxxxxxx wrote:
Ok thanks for confirming !
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On 09/06/2017 at 13:53, xxxxxxxx wrote:
Sorry again to bump this thread, but I don't udnerstand the output code while the mouse is not moving, delta y is always -22 while it should be 0
def InputEvent(self, msg) : mousex = msg[c4d.BFM_INPUT_X] mousey = msg[c4d.BFM_INPUT_Y] self.MouseDragStart(c4d.KEY_MLEFT, mousex, mousey, c4d.MOUSEDRAGFLAGS_DONTHIDEMOUSE | c4d.MOUSEDRAGFLAGS_NOMOVE) start_x = mousex start_y = mousey mx = mousex my = mousey state = c4d.BaseContainer() while True: result, dx, dy, channels = self.MouseDrag() if result == c4d.MOUSEDRAGRESULT_ESCAPE: break if not self.GetInputState(c4d.BFM_INPUT_MOUSE, c4d.BFM_INPUT_MOUSELEFT, state) : break if state[c4d.BFM_INPUT_VALUE] == 0: print "Released Left Mouse" break if dx == 0 and dy == 0: #dy != 0 while not moving continue mx += dx my += dy #Should not be display if not moving print 'drag' print start_x - mx print start_y - my #-22 if not moving return True -
On 12/06/2017 at 07:06, xxxxxxxx wrote:
Originally posted by xxxxxxxx
Sorry again to bump this thread, but I don't understand the output code while the mouse is not moving, delta y is always -22 while it should be 0
If the mouse doesn't move dx and dy are 0. The final mouse delta X and Y values depends on how you calculate the current mouse position.
It's better to subtract the mouse drag delta values:mx -= dx my -= dyThen the final delta value can be calculated:
print mx - mousex
print my - mouseyIf you don't want MouseDrag() to return when the mouse doesn't move, don't pass MOUSEDRAGFLAGS_NOMOVE to MouseDragStart().
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On 13/06/2017 at 04:52, xxxxxxxx wrote:
Ok I get why it's wrong... The corect loop initialization is:
mousex = msg[c4d.BFM_INPUT_X] mousey = msg[c4d.BFM_INPUT_Y] self.MouseDragStart(c4d.KEY_MLEFT, mousex, mousey, c4d.MOUSEDRAGFLAGS_DONTHIDEMOUSE | c4d.MOUSEDRAGFLAGS_NOMOVE) while self.MouseDrag()[0] == c4d.MOUSEDRAGRESULT_CONTINUE: if msg[c4d.BFM_INPUT_VALUE] == 0: break result, dx, dy, channels = self.MouseDrag() print "dx {} - dy {}".format(dx, dy)While in the documention of https://developers.maxon.net/docs/py/2023_2/modules/c4d.gui/EditorWindow/index.html#EditorWindow.MouseDragStart the main drag loop is done with While true, which give you a wrong value for dx/dy for the first packet of the drag input.
So doing it like in the C++ exemple
win->MouseDragStart(button, mouseX, mouseY, MOUSEDRAGFLAGS_DONTHIDEMOUSE | MOUSEDRAGFLAGS_NOMOVE); while (win->MouseDrag(&dx, &dy, &device) == MOUSEDRAGRESULT_CONTINUE)give us in python
self.MouseDragStart(c4d.KEY_MLEFT, mousex, mousey, c4d.MOUSEDRAGFLAGS_DONTHIDEMOUSE | c4d.MOUSEDRAGFLAGS_NOMOVE) while self.MouseDrag()[0] == c4d.MOUSEDRAGRESULT_CONTINUE:Anyway thanks for your support !
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On 13/06/2017 at 08:18, xxxxxxxx wrote:
I can't confirm that because the delta values returned from the call to MouseDrag()[0] aren't processed for each while loop:
while self.MouseDrag()[0] == c4d.MOUSEDRAGRESULT_CONTINUE: # dx, dy and channels not retrieved and processedThere should be only one MouseDrag() call for each while loop.
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On 13/06/2017 at 08:28, xxxxxxxx wrote:
Juste copy paste thoses two codes and do a normal click without dragging. Just a simple click (no move, nothing just a click), So result should be 0 and 0 for dx/dy in all case (in all packet of the drag pool)
The first one give correct result for dx , dyimport c4d class Area(c4d.gui.GeUserArea) : def InputEvent(self, msg) : mousex = msg[c4d.BFM_INPUT_X] mousey = msg[c4d.BFM_INPUT_Y] self.MouseDragStart(c4d.KEY_MLEFT, mousex, mousey, c4d.MOUSEDRAGFLAGS_DONTHIDEMOUSE | c4d.MOUSEDRAGFLAGS_NOMOVE) while self.MouseDrag()[0]: if msg[c4d.BFM_INPUT_VALUE] == 0: break result, dx, dy, channels = self.MouseDrag() if result!=c4d.MOUSEDRAGRESULT_CONTINUE: break print "dx {} - dy {}".format(dx, dy) return True class MyDialog(c4d.gui.GeDialog) : def CreateLayout(self) : self.area = Area() self.AddUserArea(1000, c4d.BFH_SCALEFIT|c4d.BFV_SCALEFIT) self.AttachUserArea(self.area, 1000) return True def main() : dialog = MyDialog() dialog.Open(dlgtype=c4d.DLG_TYPE_MODAL_RESIZEABLE, defaultw=500, defaulth=500) if __name__=='__main__': main()While the sdk code(using While True) give wrong result for dx, dy in the first packet (dx 4 and dy 4)
import c4d class Area(c4d.gui.GeUserArea) : def InputEvent(self, msg) : mousex = msg[c4d.BFM_INPUT_X] mousey = msg[c4d.BFM_INPUT_Y] self.MouseDragStart(c4d.KEY_MLEFT, mousex, mousey, c4d.MOUSEDRAGFLAGS_DONTHIDEMOUSE | c4d.MOUSEDRAGFLAGS_NOMOVE) while True: if msg[c4d.BFM_INPUT_VALUE] == 0: break result, dx, dy, channels = self.MouseDrag() if result!=c4d.MOUSEDRAGRESULT_CONTINUE: break print "dx {} - dy {}".format(dx, dy) return True class MyDialog(c4d.gui.GeDialog) : def CreateLayout(self) : self.area = Area() self.AddUserArea(1000, c4d.BFH_SCALEFIT|c4d.BFV_SCALEFIT) self.AttachUserArea(self.area, 1000) return True def main() : dialog = MyDialog() dialog.Open(dlgtype=c4d.DLG_TYPE_MODAL_RESIZEABLE, defaultw=500, defaulth=500) if __name__=='__main__': main() -
On 14/06/2017 at 03:17, xxxxxxxx wrote:
You're not retrieving and printing the delta values dx and dy from the self.MouseDrag()[0] calls in the first script. The delta values are 4.0 for the first mouse drag there too.
The limitation with MouseDrag() in Python is the language doesn't support assignments in expressions.