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-rw-r--r--src/widget.cpp2
-rw-r--r--src/widget_type.h8
-rw-r--r--src/window_gui.h19
3 files changed, 21 insertions, 8 deletions
diff --git a/src/widget.cpp b/src/widget.cpp
index 880a94ae5..befc94da3 100644
--- a/src/widget.cpp
+++ b/src/widget.cpp
@@ -855,7 +855,7 @@ void Window::DrawSortButtonState(int widget, SortButtonState state) const
top = this->widget[widget].top;
} else {
assert(this->nested_array != NULL);
- NWidgetBase *nwid = this->GetWidget<NWidgetBase>(widget);
+ const NWidgetBase *nwid = this->GetWidget<NWidgetBase>(widget);
base = offset + nwid->pos_x + (_dynlang.text_dir == TD_LTR ? nwid->current_x - WD_SORTBUTTON_ARROW_WIDTH : 0);
top = nwid->pos_y;
}
diff --git a/src/widget_type.h b/src/widget_type.h
index e655a465f..f273b2250 100644
--- a/src/widget_type.h
+++ b/src/widget_type.h
@@ -308,9 +308,9 @@ public:
void SetDataTip(uint16 widget_data, StringID tool_tip);
inline void SetLowered(bool lowered);
- inline bool IsLowered();
+ inline bool IsLowered() const;
inline void SetDisabled(bool disabled);
- inline bool IsDisabled();
+ inline bool IsDisabled() const;
void StoreWidgets(Widget *widgets, int length, bool left_moving, bool top_moving, bool rtl);
/* virtual */ void FillNestedArray(NWidgetBase **array, uint length);
@@ -335,7 +335,7 @@ inline void NWidgetCore::SetLowered(bool lowered)
}
/** Return whether the widget is lowered. */
-inline bool NWidgetCore::IsLowered()
+inline bool NWidgetCore::IsLowered() const
{
return HasBit(this->disp_flags, NDB_LOWERED);
}
@@ -350,7 +350,7 @@ inline void NWidgetCore::SetDisabled(bool disabled)
}
/** Return whether the widget is disabled. */
-inline bool NWidgetCore::IsDisabled()
+inline bool NWidgetCore::IsDisabled() const
{
return HasBit(this->disp_flags, NDB_DISABLED);
}
diff --git a/src/window_gui.h b/src/window_gui.h
index 2d182ba8b..a78004f89 100644
--- a/src/window_gui.h
+++ b/src/window_gui.h
@@ -389,7 +389,9 @@ public:
Window *z_back; ///< The window behind us in z-order.
template <class NWID>
- inline NWID *GetWidget(uint widnum) const;
+ inline const NWID *GetWidget(uint widnum) const;
+ template <class NWID>
+ inline NWID *GetWidget(uint widnum);
void InitNested(const WindowDesc *desc, WindowNumber number = 0);
@@ -847,7 +849,7 @@ public:
* @return The requested widget if it is instantiated, \c NULL otherwise.
*/
template <class NWID>
-inline NWID *Window::GetWidget(uint widnum) const
+inline NWID *Window::GetWidget(uint widnum)
{
if (widnum >= this->nested_array_size || this->nested_array[widnum] == NULL) return NULL;
NWID *nwid = dynamic_cast<NWID *>(this->nested_array[widnum]);
@@ -857,12 +859,23 @@ inline NWID *Window::GetWidget(uint widnum) const
/** Specialized case of #Window::GetWidget for the nested widget base class. */
template <>
-inline NWidgetBase *Window::GetWidget<NWidgetBase>(uint widnum) const
+inline const NWidgetBase *Window::GetWidget<NWidgetBase>(uint widnum) const
{
if (widnum >= this->nested_array_size) return NULL;
return this->nested_array[widnum];
}
+/** Get the nested widget with number \a widnum from the nested widget tree.
+ * @tparam NWID Type of the nested widget.
+ * @param widnum Widget number of the widget to retrieve.
+ * @return The requested widget if it is instantiated, \c NULL otherwise.
+ */
+template <class NWID>
+inline const NWID *Window::GetWidget(uint widnum) const
+{
+ return const_cast<Window *>(this)->GetWidget<NWID>(widnum);
+}
+
/**
* Base class for windows opened from a toolbar.