mirror of https://github.com/OpenTTD/OpenTTD.git
(svn r16963) -Codechange: Added NWidgetViewport widget.
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2dd998ab06
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@ -6,6 +6,8 @@
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#include "company_func.h"
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#include "gfx_func.h"
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#include "window_gui.h"
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#include "viewport_func.h"
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#include "zoom_func.h"
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#include "debug.h"
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#include "strings_func.h"
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@ -1798,6 +1800,65 @@ NWidgetBase *NWidgetBackground::GetWidgetOfType(WidgetType tp)
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return nwid;
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}
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NWidgetViewport::NWidgetViewport(int index) : NWidgetCore(NWID_VIEWPORT, INVALID_COLOUR, true, true, 0x0, STR_NULL)
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{
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this->SetIndex(index);
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}
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void NWidgetViewport::SetupSmallestSize(Window *w, bool init_array)
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{
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if (init_array && this->index >= 0) {
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assert(w->nested_array_size > (uint)this->index);
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w->nested_array[this->index] = this;
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}
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this->smallest_x = this->min_x;
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this->smallest_y = this->min_y;
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}
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void NWidgetViewport::StoreWidgets(Widget *widgets, int length, bool left_moving, bool top_moving, bool rtl)
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{
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NOT_REACHED();
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}
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void NWidgetViewport::Draw(const Window *w)
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{
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w->DrawViewport();
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}
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Scrollbar *NWidgetViewport::FindScrollbar(Window *w, bool allow_next)
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{
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return NULL;
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}
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/**
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* Initialize the viewport of the window.
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* @param w Window owning the viewport.
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* @param follow_flags Type of viewport, see #InitializeViewport().
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* @param zoom Zoom level.
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*/
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void NWidgetViewport::InitializeViewport(Window *w, uint32 follow_flags, ZoomLevel zoom)
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{
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InitializeWindowViewport(w, this->pos_x, this->pos_y, this->current_x, this->current_y, follow_flags, zoom);
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}
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/**
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* Update the position and size of the viewport (after eg a resize).
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* @param w Window owning the viewport.
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*/
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void NWidgetViewport::UpdateViewportCoordinates(Window *w)
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{
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ViewPort *vp = w->viewport;
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if (vp != NULL) {
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vp->left = w->left + this->pos_x;
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vp->top = w->top + this->pos_y;
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vp->width = this->current_x;
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vp->height = this->current_y;
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vp->virtual_width = ScaleByZoom(vp->width, vp->zoom);
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vp->virtual_height = ScaleByZoom(vp->height, vp->zoom);
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}
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}
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/** Reset the cached dimensions. */
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/* static */ void NWidgetLeaf::InvalidateDimensionCache()
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{
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@ -2401,9 +2462,15 @@ static int MakeNWidget(const NWidgetPart *parts, int count, NWidgetBase **dest,
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case WPT_ENDCONTAINER:
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return num_used;
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case NWID_VIEWPORT:
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if (*dest != NULL) return num_used;
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*dest = new NWidgetViewport(parts->u.widget.index);
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*biggest_index = max(*biggest_index, (int)parts->u.widget.index);
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break;
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default:
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if (*dest != NULL) return num_used;
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assert((parts->type & WWT_MASK) < NWID_HORIZONTAL);
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assert((parts->type & WWT_MASK) < WWT_LAST);
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*dest = new NWidgetLeaf(parts->type, parts->u.widget.colour, parts->u.widget.index, 0x0, STR_NULL);
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*biggest_index = max(*biggest_index, (int)parts->u.widget.index);
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break;
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@ -113,6 +113,7 @@ enum WidgetType {
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NWID_SPACER, ///< Invisible widget that takes some space.
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NWID_SELECTION, ///< Stacked widgets, only one visible at a time (eg in a panel with tabs).
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NWID_LAYERED, ///< Widgets layered on top of each other, all visible at the same time.
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NWID_VIEWPORT, ///< Nested widget containing a viewport.
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/* Nested widget part types. */
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WPT_RESIZE, ///< Widget part for specifying resizing.
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@ -471,6 +472,25 @@ private:
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NWidgetPIPContainer *child; ///< Child widget.
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};
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/**
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* Nested widget to display a viewport in a window.
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* After initializing the nested widget tree, call #InitializeViewport(). After changing the window size,
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* call #UpdateViewportCoordinates() eg from Window::OnResize().
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* @todo Class derives from #NWidgetCore, but does not use #colour, #widget_data, or #tool_tip.
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* @ingroup NestedWidgets */
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class NWidgetViewport : public NWidgetCore {
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public:
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NWidgetViewport(int index);
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/* virtual */ void SetupSmallestSize(Window *w, bool init_array);
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/* virtual */ void StoreWidgets(Widget *widgets, int length, bool left_moving, bool top_moving, bool rtl);
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/* virtual */ void Draw(const Window *w);
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/* virtual */ Scrollbar *FindScrollbar(Window *w, bool allow_next = true);
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void InitializeViewport(Window *w, uint32 follow_flags, ZoomLevel zoom);
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void UpdateViewportCoordinates(Window *w);
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};
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/** Leaf widget.
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* @ingroup NestedWidgets */
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class NWidgetLeaf : public NWidgetCore {
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@ -560,9 +560,7 @@ void SetWindowDirty(const Window *w)
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if (w != NULL) w->SetDirty();
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}
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/** Re-initialize a window.
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* @todo Extend the function to handle viewports.
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*/
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/** Re-initialize a window. */
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void Window::ReInit()
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{
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if (this->nested_root == NULL) return; // Only nested widget windows can re-initialize.
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@ -595,6 +593,10 @@ void Window::ReInit()
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if (dx == 0 && dy == 0) { // No resize needed.
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this->SetDirty();
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if (this->viewport != NULL) {
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NWidgetViewport *nvp = (NWidgetViewport *)nested_root->GetWidgetOfType(NWID_VIEWPORT);
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nvp->UpdateViewportCoordinates(this);
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}
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return;
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}
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@ -602,7 +604,7 @@ void Window::ReInit()
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Point diff;
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diff.x = dx;
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diff.y = dy;
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this->OnResize(diff);
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this->OnResize(diff); // Calls NWidgetViewport::UpdateViewportCoordinates()
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}
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/** Find the Window whose parent pointer points to this window
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@ -193,7 +193,7 @@ enum SortButtonState {
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* A viewport is either following a vehicle (its id in then in #follow_vehicle), or it aims to display a specific
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* location #dest_scrollpos_x, #dest_scrollpos_y (#follow_vehicle is then #INVALID_VEHICLE).
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* The actual location being shown is #scrollpos_x, #scrollpos_y.
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* @see InitializeViewport(), UpdateViewportPosition().
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* @see InitializeViewport(), UpdateViewportPosition(), UpdateViewportCoordinates().
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*/
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struct ViewportData : ViewPort {
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VehicleID follow_vehicle; ///< VehicleID to follow if following a vehicle, #INVALID_VEHICLE otherwise.
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@ -644,6 +644,7 @@ public:
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/**
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* Called after the window got resized.
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* For nested windows with a viewport, call NWidgetViewport::UpdateViewportCoordinates.
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* @param delta The amount of which the window size changed.
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*/
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virtual void OnResize(Point delta) {}
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