/**
** Handle scrolling area.
**
** @param state Scroll direction/state.
** @param fast Flag scroll faster.
**
** @todo Support dynamic acceleration of scroll speed.
** @todo If the scroll key is longer pressed the area is scrolled faster.
*/
void DoScrollArea(int state, bool fast, bool isKeyboard)
{
CViewport *vp;
int stepx;
int stepy;
static int remx = 0; // FIXME: docu
static int remy = 0; // FIXME: docu
int speed = isKeyboard ? UI.KeyScrollSpeed : UI.MouseScrollSpeed;
if (state == ScrollNone) {
return;
}
vp = UI.SelectedViewport;
if (fast) {
stepx = (int)(speed * vp->MapWidth / 2 * PixelTileSize.x * FRAMES_PER_SECOND / 4);
stepy = (int)(speed * vp->MapHeight / 2 * PixelTileSize.y * FRAMES_PER_SECOND / 4);
} else {// dynamic: let these variables increase up to fast..
// FIXME: pixels per second should be configurable
stepx = (int)(speed * PixelTileSize.x * FRAMES_PER_SECOND / 4);
stepy = (int)(speed * PixelTileSize.y * FRAMES_PER_SECOND / 4);
}
if ((state & (ScrollLeft | ScrollRight)) && (state & (ScrollLeft | ScrollRight)) != (ScrollLeft | ScrollRight)) {
stepx = stepx * 100 * 100 / VideoSyncSpeed / FRAMES_PER_SECOND / (SkipFrames + 1);
remx += stepx - (stepx / 100) * 100;
stepx /= 100;
if (remx > 100) {
++stepx;
remx -= 100;
}
} else {
stepx = 0;
}
if ((state & (ScrollUp | ScrollDown)) && (state & (ScrollUp | ScrollDown)) != (ScrollUp | ScrollDown)) {
stepy = stepy * 100 * 100 / VideoSyncSpeed / FRAMES_PER_SECOND / (SkipFrames + 1);
remy += stepy - (stepy / 100) * 100;
stepy /= 100;
if (remy > 100) {
++stepy;
remy -= 100;
}
} else {
stepy = 0;
}
if (state & ScrollUp) {
stepy = -stepy;
}
if (state & ScrollLeft) {
stepx = -stepx;
}
const PixelDiff offset(stepx, stepy);
vp->Set(vp->MapPos, vp->Offset + offset);
// This recalulates some values
HandleMouseMove(CursorScreenPos);
}
/**
** Handle scrolling area.
**
** @param state Scroll direction/state.
** @param fast Flag scroll faster.
**
** @todo Support dynamic acceleration of scroll speed.
** @todo If the scroll key is longer pressed the area is scrolled faster.
*/
void DoScrollArea(int state, bool fast)
{
CViewport *vp;
int stepx;
int stepy;
static int remx = 0; // FIXME: docu
static int remy = 0; // FIXME: docu
if (state == ScrollNone) {
return;
}
vp = UI.SelectedViewport;
if (fast) {
stepx = vp->MapWidth / 2 * TileSizeX * FRAMES_PER_SECOND;
stepy = vp->MapHeight / 2 * TileSizeY * FRAMES_PER_SECOND;
} else {// dynamic: let these variables increase upto fast..
// FIXME: pixels per second should be configurable
stepx = TileSizeX * FRAMES_PER_SECOND;
stepy = TileSizeY * FRAMES_PER_SECOND;
}
if ((state & (ScrollLeft | ScrollRight)) &&
(state & (ScrollLeft | ScrollRight)) != (ScrollLeft | ScrollRight)) {
stepx = stepx * 100 * 100 / VideoSyncSpeed / FRAMES_PER_SECOND / (SkipFrames + 1);
remx += stepx - (stepx / 100) * 100;
stepx /= 100;
if (remx > 100) {
++stepx;
remx -= 100;
}
} else {
stepx = 0;
}
if ((state & (ScrollUp | ScrollDown)) &&
(state & (ScrollUp | ScrollDown)) != (ScrollUp | ScrollDown)) {
stepy = stepy * 100 * 100 / VideoSyncSpeed / FRAMES_PER_SECOND / (SkipFrames + 1);
remy += stepy - (stepy / 100) * 100;
stepy /= 100;
if (remy > 100) {
++stepy;
remy -= 100;
}
} else {
stepy = 0;
}
if (state & ScrollUp) {
stepy = -stepy;
}
if (state & ScrollLeft) {
stepx = -stepx;
}
vp->Set(vp->MapX, vp->MapY, vp->OffsetX + stepx, vp->OffsetY + stepy);
// This recalulates some values
HandleMouseMove(CursorX, CursorY);
}