viewport_gui.cpp

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00001 /* $Id: viewport_gui.cpp 21331 2010-11-26 15:22:18Z alberth $ */
00002 
00003 /*
00004  * This file is part of OpenTTD.
00005  * OpenTTD 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, version 2.
00006  * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
00007  * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
00008  */
00009 
00012 #include "stdafx.h"
00013 #include "landscape.h"
00014 #include "window_gui.h"
00015 #include "viewport_func.h"
00016 #include "gfx_func.h"
00017 #include "strings_func.h"
00018 #include "zoom_func.h"
00019 #include "window_func.h"
00020 #include "tilehighlight_func.h"
00021 
00022 #include "table/strings.h"
00023 #include "table/sprites.h"
00024 
00026 enum ExtraViewportWindowWidgets {
00027   EVW_CAPTION,
00028   EVW_VIEWPORT,
00029   EVW_ZOOMIN,
00030   EVW_ZOOMOUT,
00031   EVW_MAIN_TO_VIEW,
00032   EVW_VIEW_TO_MAIN,
00033 };
00034 
00035 /* Extra ViewPort Window Stuff */
00036 static const NWidgetPart _nested_extra_view_port_widgets[] = {
00037   NWidget(NWID_HORIZONTAL),
00038     NWidget(WWT_CLOSEBOX, COLOUR_GREY),
00039     NWidget(WWT_CAPTION, COLOUR_GREY, EVW_CAPTION), SetDataTip(STR_EXTRA_VIEW_PORT_TITLE, STR_TOOLTIP_WINDOW_TITLE_DRAG_THIS),
00040     NWidget(WWT_SHADEBOX, COLOUR_GREY),
00041     NWidget(WWT_STICKYBOX, COLOUR_GREY),
00042   EndContainer(),
00043   NWidget(WWT_PANEL, COLOUR_GREY),
00044     NWidget(NWID_VIEWPORT, INVALID_COLOUR, EVW_VIEWPORT), SetPadding(2, 2, 2, 2), SetResize(1, 1), SetFill(1, 1),
00045   EndContainer(),
00046   NWidget(NWID_HORIZONTAL),
00047     NWidget(WWT_PUSHIMGBTN, COLOUR_GREY, EVW_ZOOMIN), SetDataTip(SPR_IMG_ZOOMIN, STR_TOOLBAR_TOOLTIP_ZOOM_THE_VIEW_IN),
00048     NWidget(WWT_PUSHIMGBTN, COLOUR_GREY, EVW_ZOOMOUT), SetDataTip(SPR_IMG_ZOOMOUT, STR_TOOLBAR_TOOLTIP_ZOOM_THE_VIEW_OUT),
00049     NWidget(NWID_HORIZONTAL, NC_EQUALSIZE),
00050       NWidget(WWT_PUSHTXTBTN, COLOUR_GREY, EVW_MAIN_TO_VIEW), SetFill(1, 1), SetResize(1, 0),
00051                     SetDataTip(STR_EXTRA_VIEW_MOVE_MAIN_TO_VIEW, STR_EXTRA_VIEW_MOVE_MAIN_TO_VIEW_TT),
00052       NWidget(WWT_PUSHTXTBTN, COLOUR_GREY, EVW_VIEW_TO_MAIN), SetFill(1, 1), SetResize(1, 0),
00053                     SetDataTip(STR_EXTRA_VIEW_MOVE_VIEW_TO_MAIN, STR_EXTRA_VIEW_MOVE_VIEW_TO_MAIN_TT),
00054     EndContainer(),
00055   EndContainer(),
00056   NWidget(NWID_HORIZONTAL),
00057     NWidget(WWT_PANEL, COLOUR_GREY), SetFill(1, 1), SetResize(1, 0), EndContainer(),
00058     NWidget(WWT_RESIZEBOX, COLOUR_GREY),
00059   EndContainer(),
00060 };
00061 
00062 class ExtraViewportWindow : public Window {
00063 public:
00064   ExtraViewportWindow(const WindowDesc *desc, int window_number, TileIndex tile) : Window()
00065   {
00066     this->InitNested(desc, window_number);
00067 
00068     NWidgetViewport *nvp = this->GetWidget<NWidgetViewport>(EVW_VIEWPORT);
00069     nvp->InitializeViewport(this, 0, ZOOM_LVL_NORMAL);
00070     this->DisableWidget(EVW_ZOOMIN);
00071 
00072     Point pt;
00073     if (tile == INVALID_TILE) {
00074       /* No tile? Use center of main viewport. */
00075       const Window *w = FindWindowById(WC_MAIN_WINDOW, 0);
00076 
00077       /* center on same place as main window (zoom is maximum, no adjustment needed) */
00078       pt.x = w->viewport->scrollpos_x + w->viewport->virtual_width / 2;
00079       pt.y = w->viewport->scrollpos_y + w->viewport->virtual_height / 2;
00080     } else {
00081       pt = RemapCoords(TileX(tile) * TILE_SIZE + TILE_SIZE / 2, TileY(tile) * TILE_SIZE + TILE_SIZE / 2, TileHeight(tile));
00082     }
00083 
00084     this->viewport->scrollpos_x = pt.x - this->viewport->virtual_width / 2;
00085     this->viewport->scrollpos_y = pt.y - this->viewport->virtual_height / 2;
00086     this->viewport->dest_scrollpos_x = this->viewport->scrollpos_x;
00087     this->viewport->dest_scrollpos_y = this->viewport->scrollpos_y;
00088   }
00089 
00090   virtual void SetStringParameters(int widget) const
00091   {
00092     switch (widget) {
00093       case EVW_CAPTION:
00094         /* set the number in the title bar */
00095         SetDParam(0, this->window_number + 1);
00096         break;
00097     }
00098   }
00099 
00100   virtual void OnClick(Point pt, int widget, int click_count)
00101   {
00102     switch (widget) {
00103       case EVW_ZOOMIN: DoZoomInOutWindow(ZOOM_IN,  this); break;
00104       case EVW_ZOOMOUT: DoZoomInOutWindow(ZOOM_OUT, this); break;
00105 
00106       case EVW_MAIN_TO_VIEW: { // location button (move main view to same spot as this view) 'Paste Location'
00107         Window *w = FindWindowById(WC_MAIN_WINDOW, 0);
00108         int x = this->viewport->scrollpos_x; // Where is the main looking at
00109         int y = this->viewport->scrollpos_y;
00110 
00111         /* set this view to same location. Based on the center, adjusting for zoom */
00112         w->viewport->dest_scrollpos_x =  x - (w->viewport->virtual_width -  this->viewport->virtual_width) / 2;
00113         w->viewport->dest_scrollpos_y =  y - (w->viewport->virtual_height - this->viewport->virtual_height) / 2;
00114         w->viewport->follow_vehicle   = INVALID_VEHICLE;
00115         break;
00116       }
00117 
00118       case EVW_VIEW_TO_MAIN: { // inverse location button (move this view to same spot as main view) 'Copy Location'
00119         const Window *w = FindWindowById(WC_MAIN_WINDOW, 0);
00120         int x = w->viewport->scrollpos_x;
00121         int y = w->viewport->scrollpos_y;
00122 
00123         this->viewport->dest_scrollpos_x =  x + (w->viewport->virtual_width -  this->viewport->virtual_width) / 2;
00124         this->viewport->dest_scrollpos_y =  y + (w->viewport->virtual_height - this->viewport->virtual_height) / 2;
00125         break;
00126       }
00127     }
00128   }
00129 
00130   virtual void OnResize()
00131   {
00132     if (this->viewport != NULL) {
00133       NWidgetViewport *nvp = this->GetWidget<NWidgetViewport>(EVW_VIEWPORT);
00134       nvp->UpdateViewportCoordinates(this);
00135     }
00136   }
00137 
00138   virtual void OnScroll(Point delta)
00139   {
00140     const ViewPort *vp = IsPtInWindowViewport(this, _cursor.pos.x, _cursor.pos.y);
00141     if (vp == NULL) return;
00142 
00143     this->viewport->scrollpos_x += ScaleByZoom(delta.x, vp->zoom);
00144     this->viewport->scrollpos_y += ScaleByZoom(delta.y, vp->zoom);
00145     this->viewport->dest_scrollpos_x = this->viewport->scrollpos_x;
00146     this->viewport->dest_scrollpos_y = this->viewport->scrollpos_y;
00147   }
00148 
00149   virtual void OnMouseWheel(int wheel)
00150   {
00151     ZoomInOrOutToCursorWindow(wheel < 0, this);
00152   }
00153 
00154   virtual void OnInvalidateData(int data = 0)
00155   {
00156     /* Only handle zoom message if intended for us (msg ZOOM_IN/ZOOM_OUT) */
00157     HandleZoomMessage(this, this->viewport, EVW_ZOOMIN, EVW_ZOOMOUT);
00158   }
00159 };
00160 
00161 static const WindowDesc _extra_view_port_desc(
00162   WDP_AUTO, 300, 268,
00163   WC_EXTRA_VIEW_PORT, WC_NONE,
00164   WDF_UNCLICK_BUTTONS,
00165   _nested_extra_view_port_widgets, lengthof(_nested_extra_view_port_widgets)
00166 );
00167 
00172 void ShowExtraViewPortWindow(TileIndex tile)
00173 {
00174   int i = 0;
00175 
00176   /* find next free window number for extra viewport */
00177   while (FindWindowById(WC_EXTRA_VIEW_PORT, i) != NULL) i++;
00178 
00179   new ExtraViewportWindow(&_extra_view_port_desc, i, tile);
00180 }
00181 
00187 void ShowExtraViewPortWindowForTileUnderCursor()
00188 {
00189   /* Use tile under mouse as center for new viewport.
00190    * Do this before creating the window, it might appear just below the mouse. */
00191   Point pt = GetTileBelowCursor();
00192   ShowExtraViewPortWindow(pt.x != -1 ? TileVirtXY(pt.x, pt.y) : INVALID_TILE);
00193 }

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