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(svn r19042) -Add: Allow mousewheel zooming in smallmap.

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alberth 2010-02-06 13:22:04 +00:00
parent a6e8c747c9
commit 4cf65e6e81
1 changed files with 23 additions and 11 deletions
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34
src/smallmap_gui.cpp
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@ -535,9 +535,11 @@ class SmallMapWindow : public Window {
}
/** Initialize or change the zoom level.
* @param change Way to change the zoom level.
* @param change Way to change the zoom level.
* @param zoom_pt Position to keep fixed while zooming.
* @pre \c *zoom_pt should contain a point in the smallmap display when zooming in or out.
*/
void SetZoomLevel(ZoomLevelChange change)
void SetZoomLevel(ZoomLevelChange change, const Point *zoom_pt)
{
static const int zoomlevels[] = {1, 2, 4, 6, 8}; // Available zoom levels. Bigger number means more zoom-out (further away).
static const int MIN_ZOOM_INDEX = 0;
@ -545,7 +547,6 @@ class SmallMapWindow : public Window {
int new_index, cur_index, sub;
Point tile;
const NWidgetBase *wid = this->GetWidget<NWidgetBase>(SM_WIDGET_MAP);
switch (change) {
case ZLC_INITIALIZE:
cur_index = - 1; // Definitely different from new_index.
@ -559,7 +560,7 @@ class SmallMapWindow : public Window {
}
assert(cur_index <= MAX_ZOOM_INDEX);
tile = this->PixelToTile(wid->current_x / 2, wid->current_y / 2, &sub);
tile = this->PixelToTile(zoom_pt->x, zoom_pt->y, &sub);
new_index = Clamp(cur_index + ((change == ZLC_ZOOM_IN) ? -1 : 1), MIN_ZOOM_INDEX, MAX_ZOOM_INDEX);
break;
@ -569,7 +570,7 @@ class SmallMapWindow : public Window {
if (new_index != cur_index) {
this->zoom = zoomlevels[new_index];
if (cur_index >= 0) {
Point new_tile = this->PixelToTile(wid->current_x / 2, wid->current_y / 2, &sub);
Point new_tile = this->PixelToTile(zoom_pt->x, zoom_pt->y, &sub);
this->SetNewScroll(this->scroll_x + (tile.x - new_tile.x) * TILE_SIZE,
this->scroll_y + (tile.y - new_tile.y) * TILE_SIZE, sub);
}
@ -858,7 +859,7 @@ public:
this->SetWidgetLoweredState(SM_WIDGET_TOGGLETOWNNAME, this->show_towns);
this->GetWidget<NWidgetStacked>(SM_WIDGET_SELECTINDUSTRIES)->SetDisplayedPlane(this->map_type != SMT_INDUSTRY);
this->SetZoomLevel(ZLC_INITIALIZE);
this->SetZoomLevel(ZLC_INITIALIZE, NULL);
this->SmallMapCenterOnCurrentPos();
}
@ -1033,12 +1034,12 @@ public:
} break;
case SM_WIDGET_ZOOM_IN:
this->SetZoomLevel(ZLC_ZOOM_IN);
break;
case SM_WIDGET_ZOOM_OUT:
this->SetZoomLevel(ZLC_ZOOM_OUT);
case SM_WIDGET_ZOOM_OUT: {
const NWidgetBase *wid = this->GetWidget<NWidgetBase>(SM_WIDGET_MAP);
Point pt = {wid->current_x / 2, wid->current_y / 2};
this->SetZoomLevel((widget == SM_WIDGET_ZOOM_IN) ? ZLC_ZOOM_IN : ZLC_ZOOM_OUT, &pt);
break;
}
case SM_WIDGET_CONTOUR: // Show land contours
case SM_WIDGET_VEHICLES: // Show vehicles
@ -1135,6 +1136,17 @@ public:
}
}
virtual void OnMouseWheel(int wheel)
{
const NWidgetBase *wid = this->GetWidget<NWidgetBase>(SM_WIDGET_MAP);
int cursor_x = _cursor.pos.x - this->left - wid->pos_x;
int cursor_y = _cursor.pos.y - this->top - wid->pos_y;
if (IsInsideMM(cursor_x, 0, wid->current_x) && IsInsideMM(cursor_y, 0, wid->current_y)) {
Point pt = {cursor_x, cursor_y};
this->SetZoomLevel((wheel < 0) ? ZLC_ZOOM_IN : ZLC_ZOOM_OUT, &pt);
}
}
virtual void OnTick()
{
/* Update the window every now and then */