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/*
* scroller.c -- manage autorepeat of virtual screen and window scrolling
*
* Copyright (C) 1993-2000 by Massimiliano Ghilardi
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
*/
#include "twin.h"
#include "data.h"
#include "methods.h"
#include "scroller.h"
#include "hw_multi.h"
#include "resize.h"
#include "printk.h"
#include "util.h"
/* FIXME: Fix screen scrolling during Interactive Drag/Resize */
msgport Scroller_MsgPort;
static void ScrollerH(msgport MsgPort);
/*
* just dummy msgs that we receive when we are called
* to start/stop scrolling immediately
*/
msg Do_Scroll, Dont_Scroll;
byte InitScroller(void) {
if ((Scroller_MsgPort=Do(Create,MsgPort)
(FnMsgPort, 8, "Scroller", (time_t)0, 401 MilliSECs, (byte)0, ScrollerH)) &&
(Do_Scroll=Do(Create,Msg)(FnMsg, 0, 0)) &&
(Dont_Scroll=Do(Create,Msg)(FnMsg, 0, 0))) {
return TRUE;
}
printk("twin: Scroller: %s\n", ErrStr);
return FALSE;
}
INLINE void ScrollerDeactivate(void) {
Scroller_MsgPort->PauseDuration.Fraction = 333 MilliSECs + 1;
Scroller_MsgPort->WakeUp = 0;
}
INLINE void ScrollerAutoRepeat(void) {
if (Scroller_MsgPort->PauseDuration.Fraction > 333 MilliSECs)
Scroller_MsgPort->PauseDuration.Fraction = 333 MilliSECs;
else
Scroller_MsgPort->PauseDuration.Fraction = 30 MilliSECs;
}
INLINE void ScrollerDelayRepeat(void) {
Scroller_MsgPort->PauseDuration.Fraction = 333 MilliSECs + 1;
}
static void ScrollerH(msgport MsgPort) {
msg Msg, saveMsg;
mouse_state *Mouse;
screen Screen;
uldat Attrib, WState;
dat Limit;
dat Mouse_delta_x, Mouse_delta_y;
byte State, FlagDeskScroll, FlagWinScroll, WinScrolled = FALSE;
window FocusWindow;
while ((Msg=Scroller_MsgPort->FirstMsg)) {
Remove(Msg);
if (Msg == Do_Scroll || Msg == Dont_Scroll)
saveMsg = Msg;
else
Delete(Msg);
}
if (saveMsg == Dont_Scroll || !All->MouseHW) {
ScrollerDeactivate();
return;
}
Mouse = &All->MouseHW->MouseState;
FocusWindow = (window)All->FirstScreen->FocusW;
if (FocusWindow && !IS_WINDOW(FocusWindow))
FocusWindow = (window)0;
if (FocusWindow) {
Attrib=FocusWindow->Attrib;
WState=FocusWindow->State;
FlagWinScroll = (((Attrib & WINDOW_X_BAR) && (WState | X_BAR_SELECT))
|| ((Attrib & WINDOW_Y_BAR) && (WState | Y_BAR_SELECT)))
&& !(WState & TAB_SELECT);
} else
FlagWinScroll = FALSE;
FlagDeskScroll = (All->SetUp->Flags & SETUP_EDGESCROLL)
&& (Mouse->keys == HOLD_LEFT || Mouse->keys == HOLD_MIDDLE || Mouse->keys == HOLD_RIGHT);
State = All->State & STATE_ANY;
if (State != STATE_DEFAULT && State != STATE_SCROLL &&
State != STATE_DRAG && State != STATE_RESIZE) {
ScrollerDeactivate();
return;
}
if (State != STATE_DEFAULT && FlagWinScroll) {
if ((WinScrolled = ExecScrollFocusWindow()))
ScrollerAutoRepeat();
}
Mouse_delta_x=-Mouse->delta_x;
Mouse_delta_y=-Mouse->delta_y;
FlagDeskScroll &= Mouse_delta_x || Mouse_delta_y;
if (!FlagDeskScroll) {
if (!WinScrolled) {
ScrollerDelayRepeat();
}
return;
}
if (FlagDeskScroll) {
Screen=All->FirstScreen;
Limit=All->SetUp->MaxMouseSnap;
if (Scroller_MsgPort->PauseDuration.Fraction > 333 MilliSECs) {
Mouse_delta_x = Sign(Mouse_delta_x);
Mouse_delta_y = Sign(Mouse_delta_y);
}
DragFirstScreen(Mouse_delta_x*Limit, Mouse_delta_y*Limit);
if (!WinScrolled)
ScrollerAutoRepeat();
StdAddEventMouse(MSG_MOUSE, DRAG_MOUSE | Mouse->keys, Mouse->x, Mouse->y);
} else {
if (!WinScrolled)
ScrollerDelayRepeat();
}
}
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