コード例 #1
0
/**
**  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);
}
コード例 #2
0
ファイル: mainloop.cpp プロジェクト: kimlavoie/BeepBeepPingus
/**
**  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);
}