#
#  Creates a drawing frame, and binds mouse events
#
set oldmousex 0
set oldmousey 0
#

# if { 1 } {
if {[catch {togl .ndraw -width 400 -height 300  -rgba true -double true -depth true -privatecmap false -stereo false -indirect true }] } {    
    puts "no OpenGL" 
} {
    #
    pack .ndraw -expand true -fill both -padx 10 -pady 10
    #
    bind .ndraw <Button-1> {
	set oldmousex %x; set oldmousey %y;
    }
    bind .ndraw <Button-2> {
	set oldmousex %x; set oldmousey %y;
    }
    bind .ndraw <Button-3> {
	set oldmousex %x; set oldmousey %y;
    }
    bind .ndraw <B1-Motion> {
	Ng_MouseMove $oldmousex $oldmousey %x %y $drawmode
	.ndraw render
	set oldmousex %x; set oldmousey %y;
    }

    bind .ndraw <Double-1> {
	Ng_MouseDblClick %x %y
	.ndraw render
	if { [winfo exists .bcprop_dlg] } { bcpropdialog }
	if { [winfo exists .surfacemeshsize_dlg] } { surfacemeshsizedialog }
	if { [winfo exists .fieldlines_dlg] } { fieldlinesdialog }
    }

    bind .ndraw <B2-Motion> {
	Ng_MouseMove $oldmousex $oldmousey %x %y move
	.ndraw render
	set oldmousex %x; set oldmousey %y;
    }

    bind .ndraw <B3-Motion> {
	Ng_MouseMove $oldmousex $oldmousey %x %y zoom
	.ndraw render
	set oldmousex %x; set oldmousey %y;
    }
}


proc popupcheckredraw { vari { x 0 } } {
    upvar $vari varname
    if { $varname == 1 } {
	set varname 0
    } {
        #        puts "popup-redraw $vari"
	Ng_Vis_Set parameters
	redraw
    }
}
proc popupcheckredraw2 { vari boolvar { x 0 } } {
    upvar $vari varname
    if { $varname == 1 } {
	set varname 0
    } {
	Ng_SetVisParameters
	if { $boolvar == 1 } { redraw }
	Ng_SetVisParameters
    }
}
proc popupcheckredraw3 { vari { x 0 } } {
    upvar $vari varname
    if { $varname == 1 } {
	set varname 0
    } {
	Ng_Vis_Set parameters
    }
}




proc redraw { {x 0} } {
    if {[winfo exists .ndraw]} { .ndraw render } 
}



bind . <Left> { Ng_MouseMove 0 0 -10 0 rotate; redraw }
bind . <Right> { Ng_MouseMove 0 0 10 0 rotate; redraw }
bind . <Up> { Ng_MouseMove 0 0 0 -10 rotate; redraw }
bind . <Down> { Ng_MouseMove 0 0 0 10 rotate; redraw }
bind . <Shift-Left> { Ng_MouseMove 0 0 -10 0 move; redraw }
bind . <Shift-Right> { Ng_MouseMove 0 0 10 0 move; redraw }
bind . <Shift-Up> { Ng_MouseMove 0 0 0 -10 move; redraw }
bind . <Shift-Down> { Ng_MouseMove 0 0 0 10 move; redraw }
bind . <Control-Up> { Ng_MouseMove 0 0 0 -10 zoom; redraw }
bind . <Control-Down> { Ng_MouseMove 0 0 0 10 zoom; redraw }

bind all <Button-4> \
   {event generate [focus -displayof %W] <MouseWheel> -delta  120}

 bind all <Button-5> \
   {event generate [focus -displayof %W] <MouseWheel> -delta -120}

bind all <MouseWheel> { Ng_MouseMove 0 0 0 [expr {%D/-5}] zoom; redraw }