cpp/openttd-patchpack/source Changeset - r14523:4e778c543d98

Changeset - r14523:4e778c543d98

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alberth - 14 years ago 2010-02-12 13:46:41
alberth@openttd.org

(svn r19104) -Fix (r19039): Stablize main view centering in smallmap.

1 file changed with 38 insertions and 7 deletions:

src/smallmap_gui.cpp

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src/smallmap_gui.cpp

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@@ @@ -557,15 +557,16 @@ class SmallMapWindow : public Window { @@
 	/**
 	 * Determine the tile relative to the base tile of the smallmap, and the pixel position at
 	 * that tile for a point in the smallmap.
 	 * @param px Horizontal coordinate of the pixel.
 	 * @param py Vertical coordinate of the pixel.
 	 * @param px       Horizontal coordinate of the pixel.
 	 * @param py       Vertical coordinate of the pixel.
 	 * @param sub[out] Pixel position at the tile (0..3).
 	 * @param add_sub  Add current #subscroll to the position.
 	 * @return Tile being displayed at the given position relative to #scroll_x and #scroll_y.
 	 * @note The #subscroll offset is already accounted for.
 	 */
 	FORCEINLINE Point PixelToTile(int px, int py, int *sub) const
+	FORCEINLINE Point PixelToTile(int px, int py, int *sub, bool add_sub = true) const
+	{
 		px += this->subscroll;  // Total horizontal offset.
+		if (add_sub) px += this->subscroll;  // Total horizontal offset.
 		/* For each two rows down, add a x and a y tile, and
 		 * For each four pixels to the right, move a tile to the right. */
@@ @@ -586,6 +587,37 @@ class SmallMapWindow : public Window { @@
 		return pt;
+	}
 	/**
 	 * Compute base parameters of the smallmap such that tile (\a tx, \a ty) starts at pixel (\a x, \a y).
 	 * @param tx        Tile x coordinate.
 	 * @param ty        Tile y coordinate.
 	 * @param x         Non-negative horizontal position in the display where the tile starts.
 	 * @param y         Non-negative vertical position in the display where the tile starts.
 	 * @param sub [out] Value of #subscroll needed.
 	 * @return #scroll_x, #scroll_y values.
 	 */
 	Point ComputeScroll(int tx, int ty, int x, int y, int *sub)
+	{
 		assert(x >= 0 && y >= 0);
 		int new_sub;
 		Point tile_xy = PixelToTile(x, y, &new_sub, false);
 		tx -= tile_xy.x;
 		ty -= tile_xy.y;
 		Point scroll;
 		if (new_sub == 0) {
 			*sub = 0;
 			scroll.x = (tx + this->zoom) * TILE_SIZE;
 			scroll.y = (ty - this->zoom) * TILE_SIZE;
 		} else {
 			*sub = 4 - new_sub;
 			scroll.x = (tx + 2 * this->zoom) * TILE_SIZE;
 			scroll.y = (ty - 2 * this->zoom) * TILE_SIZE;
+		}
 		return scroll;
+	}
 	/** Initialize or change the zoom level.
 	 * @param change  Way to change the zoom level.
 	 * @param zoom_pt Position to keep fixed while zooming.
@@ @@ -1287,9 +1319,8 @@ public: @@
 		int sub;
 		const NWidgetBase *wid = this->GetWidget<NWidgetBase>(SM_WIDGET_MAP);
 		Point tile = this->PixelToTile(wid->current_x / 2, wid->current_y / 2, &sub);
 		this->SetNewScroll(pt.x - tile.x * TILE_SIZE, pt.y - tile.y * TILE_SIZE, sub);
 		Point sxy = this->ComputeScroll(pt.x / TILE_SIZE, pt.y / TILE_SIZE, max(0, (int)wid->current_x / 2 - 2), wid->current_y / 2, &sub);
 		this->SetNewScroll(sxy.x, sxy.y, sub);
 		this->SetDirty();
+	}
 };

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