Merge from trunk.

Subversion-branch: /branches/raven-branch
Subversion-revision: 2347

21 files changed, 350 insertions, 71 deletions

diff --git a/textscreen/txt_button.c b/textscreen/txt_button.c
index 85517b3d..536e5f56 100644
--- a/textscreen/txt_button.c
+++ b/textscreen/txt_button.c
@@ -46,16 +46,12 @@ static void TXT_ButtonDrawer(TXT_UNCAST_ARG(button), int selected)
 
     w = button->widget.w;
 
-    TXT_BGColor(TXT_COLOR_BLUE, 0);
     TXT_FGColor(TXT_COLOR_BRIGHT_WHITE);
 
-    if (selected)
-    {
-        TXT_BGColor(TXT_COLOR_GREY, 0);
-    }
+    TXT_SetWidgetBG(button, selected);
 
     TXT_DrawString(button->label);
-    
+
     for (i=strlen(button->label); i < w; ++i)
     {
         TXT_DrawString(" ");
diff --git a/textscreen/txt_checkbox.c b/textscreen/txt_checkbox.c
index 35c5739d..f2183b7c 100644
--- a/textscreen/txt_checkbox.c
+++ b/textscreen/txt_checkbox.c
@@ -48,7 +48,7 @@ static void TXT_CheckBoxDrawer(TXT_UNCAST_ARG(checkbox), int selected)
 
     w = checkbox->widget.w;
 
-    TXT_BGColor(TXT_COLOR_BLUE, 0);
+    TXT_BGColor(TXT_WINDOW_BACKGROUND, 0);
     TXT_FGColor(TXT_COLOR_BRIGHT_CYAN);
     TXT_DrawString("(");
 
@@ -67,11 +67,7 @@ static void TXT_CheckBoxDrawer(TXT_UNCAST_ARG(checkbox), int selected)
 
     TXT_DrawString(") ");
 
-    if (selected)
-    {
-        TXT_BGColor(TXT_COLOR_GREY, 0);
-    }
-
+    TXT_SetWidgetBG(checkbox, selected);
     TXT_FGColor(TXT_COLOR_BRIGHT_WHITE);
 
     TXT_DrawString(checkbox->label);
diff --git a/textscreen/txt_desktop.c b/textscreen/txt_desktop.c
index f833441f..c497f0e3 100644
--- a/textscreen/txt_desktop.c
+++ b/textscreen/txt_desktop.c
@@ -61,6 +61,16 @@ void TXT_RemoveDesktopWindow(txt_window_t *win)
     num_windows = to;
 }
 
+txt_window_t *TXT_GetActiveWindow(void)
+{
+    if (num_windows == 0)
+    {
+        return NULL;
+    }
+
+    return all_windows[num_windows - 1];
+}
+
 static void DrawDesktopBackground(const char *title)
 {
     int i;
diff --git a/textscreen/txt_desktop.h b/textscreen/txt_desktop.h
index 95343977..42a011e7 100644
--- a/textscreen/txt_desktop.h
+++ b/textscreen/txt_desktop.h
@@ -63,6 +63,15 @@ void TXT_ExitMainLoop(void);
 
 void TXT_GUIMainLoop(void);
 
+/**
+ * Get the top window on the desktop that is currently receiving
+ * inputs.
+ *
+ * @return    The active window, or NULL if no windows are present.
+ */
+
+txt_window_t *TXT_GetActiveWindow(void);
+
 #endif /* #ifndef TXT_DESKTOP_H */
 
 
diff --git a/textscreen/txt_dropdown.c b/textscreen/txt_dropdown.c
index c8103302..c9a5d015 100644
--- a/textscreen/txt_dropdown.c
+++ b/textscreen/txt_dropdown.c
@@ -99,6 +99,22 @@ static int SelectorWindowListener(txt_window_t *window, int key, void *user_data
     return 0;
 }
 
+static int SelectorMouseListener(txt_window_t *window, int x, int y, int b,
+                                 void *unused)
+{
+    txt_widget_t *win;
+
+    win = (txt_widget_t *) window;
+
+    if (x < win->x || x > win->x + win->w || y < win->y || y > win->y + win->h)
+    {
+        TXT_CloseWindow(window);
+        return 1;
+    }
+
+    return 0;
+}
+
 // Open the dropdown list window to select an item
 
 static void OpenSelectorWindow(txt_dropdown_list_t *list)
@@ -158,6 +174,7 @@ static void OpenSelectorWindow(txt_dropdown_list_t *list)
     // Catch presses of escape in this window and close it.
 
     TXT_SetKeyListener(window, SelectorWindowListener, NULL);
+    TXT_SetMouseListener(window, SelectorMouseListener, NULL);
 }
 
 static int DropdownListWidth(txt_dropdown_list_t *list)
@@ -197,15 +214,7 @@ static void TXT_DropdownListDrawer(TXT_UNCAST_ARG(list), int selected)
 
     // Set bg/fg text colors.
 
-    if (selected) 
-    {
-        TXT_BGColor(TXT_COLOR_GREY, 0);
-    }
-    else
-    {
-        TXT_BGColor(TXT_COLOR_BLUE, 0);
-    }
-
+    TXT_SetWidgetBG(list, selected);
     TXT_FGColor(TXT_COLOR_BRIGHT_WHITE);
 
     // Select a string to draw from the list, if the current value is
diff --git a/textscreen/txt_gui.c b/textscreen/txt_gui.c
index ec166415..d00e3a65 100644
--- a/textscreen/txt_gui.c
+++ b/textscreen/txt_gui.c
@@ -131,7 +131,7 @@ void TXT_DrawWindowFrame(const char *title, int x, int y, int w, int h)
     int bx, by;
 
     TXT_FGColor(TXT_COLOR_BRIGHT_CYAN);
-    TXT_BGColor(TXT_COLOR_BLUE, 0);
+    TXT_BGColor(TXT_WINDOW_BACKGROUND, 0);
 
     for (y1=y; y1<y+h; ++y1)
     {
@@ -191,7 +191,7 @@ void TXT_DrawSeparator(int x, int y, int w)
     data = TXT_GetScreenData();
 
     TXT_FGColor(TXT_COLOR_BRIGHT_CYAN);
-    TXT_BGColor(TXT_COLOR_BLUE, 0);
+    TXT_BGColor(TXT_WINDOW_BACKGROUND, 0);
 
     if (!VALID_Y(y))
     {
diff --git a/textscreen/txt_gui.h b/textscreen/txt_gui.h
index ad7ae428..06fc7a36 100644
--- a/textscreen/txt_gui.h
+++ b/textscreen/txt_gui.h
@@ -27,6 +27,9 @@
 #ifndef TXT_GUI_H
 #define TXT_GUI_H
 
+#define TXT_WINDOW_BACKGROUND TXT_COLOR_BLUE
+#define TXT_HOVER_BACKGROUND  TXT_COLOR_CYAN
+
 void TXT_DrawDesktopBackground(const char *title);
 void TXT_DrawWindowFrame(const char *title, int x, int y, int w, int h);
 void TXT_DrawSeparator(int x, int y, int w);
@@ -35,6 +38,7 @@ void TXT_DrawString(const char *s);
 void TXT_DrawHorizScrollbar(int x, int y, int w, int cursor, int range);
 void TXT_DrawVertScrollbar(int x, int y, int h, int cursor, int range);
 
+
 void TXT_InitClipArea(void);
 void TXT_PushClipArea(int x1, int x2, int y1, int y2);
 void TXT_PopClipArea(void);
diff --git a/textscreen/txt_inputbox.c b/textscreen/txt_inputbox.c
index 852346f3..a28c342c 100644
--- a/textscreen/txt_inputbox.c
+++ b/textscreen/txt_inputbox.c
@@ -60,15 +60,9 @@ static void TXT_InputBoxDrawer(TXT_UNCAST_ARG(inputbox), int selected)
     {
         TXT_BGColor(TXT_COLOR_BLACK, 0);
     }
-    else if (selected)
-    {
-        TXT_BGColor(TXT_COLOR_GREY, 0);
-    }
     else
     {
-        // Not even selected
-
-        TXT_BGColor(TXT_COLOR_BLUE, 0);
+        TXT_SetWidgetBG(inputbox, selected);
     }
 
     TXT_FGColor(TXT_COLOR_BRIGHT_WHITE);
diff --git a/textscreen/txt_label.c b/textscreen/txt_label.c
index 0deea803..c973bce2 100644
--- a/textscreen/txt_label.c
+++ b/textscreen/txt_label.c
@@ -176,7 +176,7 @@ txt_label_t *TXT_NewLabel(char *text)
 
     // Default colors
 
-    label->bgcolor = TXT_COLOR_BLUE;
+    label->bgcolor = TXT_WINDOW_BACKGROUND;
     label->fgcolor = TXT_COLOR_BRIGHT_WHITE;
 
     TXT_SetLabel(label, text);
diff --git a/textscreen/txt_main.h b/textscreen/txt_main.h
index add30fa3..a415ee1b 100644
--- a/textscreen/txt_main.h
+++ b/textscreen/txt_main.h
@@ -34,10 +34,12 @@
 
 // Special keypress values that correspond to mouse button clicks
 
-#define TXT_MOUSE_BASE   0x10000
-#define TXT_MOUSE_LEFT   (TXT_MOUSE_BASE + 0)
-#define TXT_MOUSE_RIGHT  (TXT_MOUSE_BASE + 1)
-#define TXT_MOUSE_MIDDLE (TXT_MOUSE_BASE + 2)
+#define TXT_MOUSE_BASE         0x10000
+#define TXT_MOUSE_LEFT         (TXT_MOUSE_BASE + 0)
+#define TXT_MOUSE_RIGHT        (TXT_MOUSE_BASE + 1)
+#define TXT_MOUSE_MIDDLE       (TXT_MOUSE_BASE + 2)
+#define TXT_MOUSE_SCROLLUP     (TXT_MOUSE_BASE + 3)
+#define TXT_MOUSE_SCROLLDOWN   (TXT_MOUSE_BASE + 4)
 #define TXT_MAX_MOUSE_BUTTONS  16
 
 // Screen size
@@ -67,6 +69,16 @@ typedef enum
     TXT_COLOR_BRIGHT_WHITE,
 } txt_color_t;
 
+// Modifier keys.
+
+typedef enum
+{
+    TXT_MOD_SHIFT,
+    TXT_MOD_CTRL,
+    TXT_MOD_ALT,
+    TXT_NUM_MODIFIERS
+} txt_modifier_t;
+
 // Initialize the screen
 // Returns 1 if successful, 0 if failed.
 
@@ -92,6 +104,10 @@ void TXT_UpdateScreen(void);
 
 int TXT_GetChar(void);
 
+// Read the current state of modifier keys that are held down.
+
+int TXT_GetModifierState(txt_modifier_t mod);
+
 // Provides a short description of a key code, placing into the 
 // provided buffer.
 
diff --git a/textscreen/txt_radiobutton.c b/textscreen/txt_radiobutton.c
index 00c2c4fc..0755562d 100644
--- a/textscreen/txt_radiobutton.c
+++ b/textscreen/txt_radiobutton.c
@@ -48,7 +48,7 @@ static void TXT_RadioButtonDrawer(TXT_UNCAST_ARG(radiobutton), int selected)
 
     w = radiobutton->widget.w;
 
-    TXT_BGColor(TXT_COLOR_BLUE, 0);
+    TXT_BGColor(TXT_WINDOW_BACKGROUND, 0);
     TXT_FGColor(TXT_COLOR_BRIGHT_CYAN);
     TXT_DrawString("(");
 
@@ -67,11 +67,7 @@ static void TXT_RadioButtonDrawer(TXT_UNCAST_ARG(radiobutton), int selected)
 
     TXT_DrawString(") ");
 
-    if (selected)
-    {
-        TXT_BGColor(TXT_COLOR_GREY, 0);
-    }
-
+    TXT_SetWidgetBG(radiobutton, selected);
     TXT_FGColor(TXT_COLOR_BRIGHT_WHITE);
 
     TXT_DrawString(radiobutton->label);
diff --git a/textscreen/txt_scrollpane.c b/textscreen/txt_scrollpane.c
index 17c9bcbf..2fd45c55 100644
--- a/textscreen/txt_scrollpane.c
+++ b/textscreen/txt_scrollpane.c
@@ -416,6 +416,33 @@ static void TXT_ScrollPaneMousePress(TXT_UNCAST_ARG(scrollpane),
 
     scrollbars = NeedsScrollbars(scrollpane);
 
+    if (b == TXT_MOUSE_SCROLLUP)
+    {
+        if (scrollbars & SCROLLBAR_VERTICAL)
+        {
+            scrollpane->y -= 3;
+        }
+        else if (scrollbars & SCROLLBAR_HORIZONTAL)
+        {
+            scrollpane->x -= 3;
+        }
+
+        return;
+    }
+    else if (b == TXT_MOUSE_SCROLLDOWN)
+    {
+        if (scrollbars & SCROLLBAR_VERTICAL)
+        {
+            scrollpane->y += 3;
+        }
+        else if (scrollbars & SCROLLBAR_HORIZONTAL)
+        {
+            scrollpane->x += 3;
+        }
+
+        return;
+    }
+
     rel_x = x - scrollpane->widget.x;
     rel_y = y - scrollpane->widget.y;
 
@@ -433,14 +460,15 @@ static void TXT_ScrollPaneMousePress(TXT_UNCAST_ARG(scrollpane),
         else
         {
             int range = FullWidth(scrollpane) - scrollpane->w;
+            int bar_max = scrollpane->w - 3;
 
-            scrollpane->x = ((rel_x - 1) * range) / (scrollpane->w - 3);
+            scrollpane->x = ((rel_x - 1) * range + (bar_max / 2)) / bar_max;
         }
 
         return;
     }
 
-    // Click on the horizontal scrollbar?
+    // Click on the vertical scrollbar?
     if ((scrollbars & SCROLLBAR_VERTICAL) && rel_x == scrollpane->w)
     {
         if (rel_y == 0)
@@ -454,8 +482,9 @@ static void TXT_ScrollPaneMousePress(TXT_UNCAST_ARG(scrollpane),
         else
         {
             int range = FullHeight(scrollpane) - scrollpane->h;
+            int bar_max = scrollpane->h - 3;
 
-            scrollpane->y = ((rel_y - 1) * range) / (scrollpane->h - 3);
+            scrollpane->y = ((rel_y - 1) * range + (bar_max / 2)) / bar_max;
         }
 
         return;
@@ -465,7 +494,6 @@ static void TXT_ScrollPaneMousePress(TXT_UNCAST_ARG(scrollpane),
     {
         TXT_WidgetMousePress(scrollpane->child, x, y, b);
     }
-
 }
 
 static void TXT_ScrollPaneLayout(TXT_UNCAST_ARG(scrollpane))
@@ -529,6 +557,10 @@ txt_scrollpane_t *TXT_NewScrollPane(int w, int h, TXT_UNCAST_ARG(target))
     scrollpane->expand_w = w <= 0;
     scrollpane->expand_h = h <= 0;
 
+    // Set parent pointer for inner widget.
+
+    target->parent = &scrollpane->widget;
+
     return scrollpane;
 }
 
diff --git a/textscreen/txt_sdl.c b/textscreen/txt_sdl.c
index 2fbaa316..477fdb52 100644
--- a/textscreen/txt_sdl.c
+++ b/textscreen/txt_sdl.c
@@ -63,6 +63,8 @@ static int key_mapping = 1;
 static TxtSDLEventCallbackFunc event_callback;
 static void *event_callback_data;
 
+static int modifier_state[TXT_NUM_MODIFIERS];
+
 // Font we are using:
 
 static txt_font_t *font;
@@ -225,7 +227,7 @@ int TXT_Init(void)
 
     // Ignore all mouse motion events
 
-    SDL_EventState(SDL_MOUSEMOTION, SDL_IGNORE);
+//    SDL_EventState(SDL_MOUSEMOTION, SDL_IGNORE);
 
     // Repeat key presses so we can hold down arrows to scroll down the
     // menu, for example. This is what setup.exe does.
@@ -479,6 +481,66 @@ static int SDLButtonToTXTButton(int button)
     }
 }
 
+static int MouseHasMoved(void)
+{
+    static int last_x = 0, last_y = 0;
+    int x, y;
+
+    TXT_GetMousePosition(&x, &y);
+
+    if (x != last_x || y != last_y)
+    {
+        last_x = x; last_y = y;
+        return 1;
+    }
+    else
+    {
+        return 0;
+    }
+}
+
+// Examine a key press/release and update the modifier key state
+// if necessary.
+
+static void UpdateModifierState(SDL_keysym *sym, int pressed)
+{
+    txt_modifier_t mod;
+
+    switch (sym->sym)
+    {
+        case SDLK_LSHIFT:
+        case SDLK_RSHIFT:
+            mod = TXT_MOD_SHIFT;
+            break;
+
+        case SDLK_LCTRL:
+        case SDLK_RCTRL:
+            mod = TXT_MOD_CTRL;
+            break;
+
+        case SDLK_LALT:
+        case SDLK_RALT:
+#if !SDL_VERSION_ATLEAST(1, 3, 0)
+        case SDLK_LMETA:
+        case SDLK_RMETA:
+#endif
+            mod = TXT_MOD_ALT;
+            break;
+
+        default:
+            return;
+    }
+
+    if (pressed)
+    {
+        ++modifier_state[mod];
+    }
+    else
+    {
+        --modifier_state[mod];
+    }
+}
+
 signed int TXT_GetChar(void)
 {
     SDL_Event ev;
@@ -508,12 +570,24 @@ signed int TXT_GetChar(void)
                 break;
 
             case SDL_KEYDOWN:
+                UpdateModifierState(&ev.key.keysym, 1);
+
                 return TranslateKey(&ev.key.keysym);
 
+            case SDL_KEYUP:
+                UpdateModifierState(&ev.key.keysym, 0);
+                break;
+
             case SDL_QUIT:
                 // Quit = escape
                 return 27;
 
+            case SDL_MOUSEMOTION:
+                if (MouseHasMoved())
+                {
+                    return 0;
+                }
+
             default:
                 break;
         }
@@ -522,6 +596,16 @@ signed int TXT_GetChar(void)
     return -1;
 }
 
+int TXT_GetModifierState(txt_modifier_t mod)
+{
+    if (mod < TXT_NUM_MODIFIERS)
+    {
+        return modifier_state[mod] > 0;
+    }
+
+    return 0;
+}
+
 static const char *SpecialKeyName(int key)
 {
     switch (key)
diff --git a/textscreen/txt_separator.c b/textscreen/txt_separator.c
index 6b779626..89db0b03 100644
--- a/textscreen/txt_separator.c
+++ b/textscreen/txt_separator.c
@@ -65,7 +65,7 @@ static void TXT_SeparatorDrawer(TXT_UNCAST_ARG(separator), int selected)
     {
         TXT_GotoXY(x, y);
 
-        TXT_BGColor(TXT_COLOR_BLUE, 0);
+        TXT_BGColor(TXT_WINDOW_BACKGROUND, 0);
         TXT_FGColor(TXT_COLOR_BRIGHT_GREEN);
         TXT_DrawString(" ");
         TXT_DrawString(separator->label);
@@ -80,6 +80,20 @@ static void TXT_SeparatorDestructor(TXT_UNCAST_ARG(separator))
     free(separator->label);
 }
 
+void TXT_SetSeparatorLabel(txt_separator_t *separator, char *label)
+{
+    free(separator->label);
+
+    if (label != NULL)
+    {
+        separator->label = strdup(label);
+    }
+    else
+    {
+        separator->label = NULL;
+    }
+}
+
 txt_widget_class_t txt_separator_class =
 {
     TXT_NeverSelectable,
@@ -99,14 +113,8 @@ txt_separator_t *TXT_NewSeparator(char *label)
 
     TXT_InitWidget(separator, &txt_separator_class);
 
-    if (label != NULL)
-    {
-        separator->label = strdup(label);
-    }
-    else
-    {
-        separator->label = NULL;
-    }
+    separator->label = NULL;
+    TXT_SetSeparatorLabel(separator, label);
 
     return separator;
 }
diff --git a/textscreen/txt_separator.h b/textscreen/txt_separator.h
index 2f2331da..f693d70e 100644
--- a/textscreen/txt_separator.h
+++ b/textscreen/txt_separator.h
@@ -59,6 +59,14 @@ extern txt_widget_class_t txt_separator_class;
 
 txt_separator_t *TXT_NewSeparator(char *label);
 
-#endif /* #ifndef TXT_SEPARATOR_H */
+/**
+ * Change the label on a separator.
+ *
+ * @param separator     The separator.
+ * @param label         The new label.
+ */
+
+void TXT_SetSeparatorLabel(txt_separator_t *separator, char *label);
 
+#endif /* #ifndef TXT_SEPARATOR_H */
 
diff --git a/textscreen/txt_spinctrl.c b/textscreen/txt_spinctrl.c
index d775aecf..2b2d4d09 100644
--- a/textscreen/txt_spinctrl.c
+++ b/textscreen/txt_spinctrl.c
@@ -149,7 +149,7 @@ static void TXT_SpinControlDrawer(TXT_UNCAST_ARG(spincontrol), int selected)
     unsigned int padding;
 
     TXT_FGColor(TXT_COLOR_BRIGHT_CYAN);
-    TXT_BGColor(TXT_COLOR_BLUE, 0);
+    TXT_BGColor(TXT_WINDOW_BACKGROUND, 0);
 
     TXT_DrawString("\x1b ");
     
@@ -161,13 +161,9 @@ static void TXT_SpinControlDrawer(TXT_UNCAST_ARG(spincontrol), int selected)
     {
         TXT_BGColor(TXT_COLOR_BLACK, 0);
     }
-    else if (selected)
-    {
-        TXT_BGColor(TXT_COLOR_GREY, 0);
-    }
     else
     {
-        TXT_BGColor(TXT_COLOR_BLUE, 0);
+        TXT_SetWidgetBG(spincontrol, selected);
     }
 
     if (!spincontrol->editing)
@@ -195,7 +191,7 @@ static void TXT_SpinControlDrawer(TXT_UNCAST_ARG(spincontrol), int selected)
     }
 
     TXT_FGColor(TXT_COLOR_BRIGHT_CYAN);
-    TXT_BGColor(TXT_COLOR_BLUE, 0);
+    TXT_BGColor(TXT_WINDOW_BACKGROUND, 0);
     TXT_DrawString(" \x1a");
 }
 
diff --git a/textscreen/txt_table.c b/textscreen/txt_table.c
index ffe6fd14..7a8624f0 100644
--- a/textscreen/txt_table.c
+++ b/textscreen/txt_table.c
@@ -173,6 +173,13 @@ void TXT_AddWidget(TXT_UNCAST_ARG(table), TXT_UNCAST_ARG(widget))
                              sizeof(txt_widget_t *) * (table->num_widgets + 1));
     table->widgets[table->num_widgets] = widget;
     ++table->num_widgets;
+
+    // Maintain parent pointer.
+
+    if (widget != NULL)
+    {
+        widget->parent = &table->widget;
+    }
 }
 
 // Add multiple widgets to a table.
diff --git a/textscreen/txt_widget.c b/textscreen/txt_widget.c
index 760943d5..d47a7507 100644
--- a/textscreen/txt_widget.c
+++ b/textscreen/txt_widget.c
@@ -24,6 +24,8 @@
 
 #include "txt_io.h"
 #include "txt_widget.h"
+#include "txt_gui.h"
+#include "txt_desktop.h"
 
 typedef struct
 {
@@ -82,6 +84,7 @@ void TXT_InitWidget(TXT_UNCAST_ARG(widget), txt_widget_class_t *widget_class)
 
     widget->widget_class = widget_class;
     widget->callback_table = TXT_NewCallbackTable();
+    widget->parent = NULL;
 
     // Visible by default.
 
@@ -237,3 +240,62 @@ int TXT_SelectableWidget(TXT_UNCAST_ARG(widget))
     }
 }
 
+int TXT_ContainsWidget(TXT_UNCAST_ARG(haystack), TXT_UNCAST_ARG(needle))
+{
+    TXT_CAST_ARG(txt_widget_t, haystack);
+    TXT_CAST_ARG(txt_widget_t, needle);
+
+    while (needle != NULL)
+    {
+        if (needle == haystack)
+        {
+            return 1;
+        }
+
+        needle = needle->parent;
+    }
+
+    return 0;
+}
+
+int TXT_HoveringOverWidget(TXT_UNCAST_ARG(widget))
+{
+    TXT_CAST_ARG(txt_widget_t, widget);
+    txt_window_t *active_window;
+    int x, y;
+
+    // We can only be hovering over widgets in the active window.
+
+    active_window = TXT_GetActiveWindow();
+
+    if (active_window == NULL || !TXT_ContainsWidget(active_window, widget))
+    {
+        return 0;
+    }
+
+    // Is the mouse cursor within the bounds of the widget?
+
+    TXT_GetMousePosition(&x, &y);
+
+    return (x >= widget->x && x < widget->x + widget->w
+         && y >= widget->y && y < widget->y + widget->h);
+}
+
+void TXT_SetWidgetBG(TXT_UNCAST_ARG(widget), int selected)
+{
+    TXT_CAST_ARG(txt_widget_t, widget);
+
+    if (selected)
+    {
+        TXT_BGColor(TXT_COLOR_GREY, 0);
+    }
+    else if (TXT_HoveringOverWidget(widget))
+    {
+        TXT_BGColor(TXT_HOVER_BACKGROUND, 0);
+    }
+    else
+    {
+        TXT_BGColor(TXT_WINDOW_BACKGROUND, 0);
+    }
+}
+
diff --git a/textscreen/txt_widget.h b/textscreen/txt_widget.h
index bb895f92..ebb5a292 100644
--- a/textscreen/txt_widget.h
+++ b/textscreen/txt_widget.h
@@ -102,6 +102,10 @@ struct txt_widget_s
 
     int x, y;
     unsigned int w, h;
+
+    // Pointer up to parent widget that contains this widget.
+
+    txt_widget_t *parent;
 };
 
 void TXT_InitWidget(TXT_UNCAST_ARG(widget), txt_widget_class_t *widget_class);
@@ -146,6 +150,34 @@ void TXT_SetWidgetAlign(TXT_UNCAST_ARG(widget), txt_horiz_align_t horiz_align);
 
 int TXT_SelectableWidget(TXT_UNCAST_ARG(widget));
 
-#endif /* #ifndef TXT_WIDGET_H */
+/**
+ * Query whether the mouse is hovering over the specified widget.
+ *
+ * @param widget       The widget.
+ * @return             Non-zero if the mouse cursor is over the widget.
+ */
+
+int TXT_HoveringOverWidget(TXT_UNCAST_ARG(widget));
+
+/**
+ * Set the background to draw the specified widget, depending on
+ * whether it is selected and the mouse is hovering over it.
+ *
+ * @param widget       The widget.
+ * @param selected     Whether the widget is selected.
+ */
+
+void TXT_SetWidgetBG(TXT_UNCAST_ARG(widget), int selected);
+
+/**
+ * Query whether the specified widget is contained within another
+ * widget.
+ *
+ * @param haystack     The widget that might contain needle.
+ * @param needle       The widget being queried.
+ */
 
+int TXT_ContainsWidget(TXT_UNCAST_ARG(haystack), TXT_UNCAST_ARG(needle));
+
+#endif /* #ifndef TXT_WIDGET_H */
 
diff --git a/textscreen/txt_window.c b/textscreen/txt_window.c
index 46e71d3a..cd8a6c7a 100644
--- a/textscreen/txt_window.c
+++ b/textscreen/txt_window.c
@@ -40,6 +40,13 @@ void TXT_SetWindowAction(txt_window_t *window,
     }
 
     window->actions[position] = action;
+
+    // Maintain parent pointer.
+
+    if (action != NULL)
+    {
+        action->widget.parent = &window->table.widget;
+    }
 }
 
 txt_window_t *TXT_NewWindow(char *title)
@@ -158,7 +165,7 @@ static void LayoutActionArea(txt_window_t *window)
 
         TXT_CalcWidgetSize(widget);
 
-        widget->x = window->window_x + 2;
+        widget->x = window->window_x + 1;
         widget->y = window->window_y + window->window_h - widget->h - 1;
 
         // Adjust available space:
@@ -175,7 +182,7 @@ static void LayoutActionArea(txt_window_t *window)
 
         TXT_CalcWidgetSize(widget);
 
-        widget->x = window->window_x + window->window_w - 2 - widget->w;
+        widget->x = window->window_x + window->window_w - 1 - widget->w;
         widget->y = window->window_y + window->window_h - widget->h - 1;
 
         // Adjust available space:
@@ -220,7 +227,7 @@ static void CalcActionAreaSize(txt_window_t *window,
     txt_widget_t *widget;
     int i;
 
-    *w = 1;
+    *w = 0;
     *h = 0;
 
     // Calculate the width of all the action widgets and use this
@@ -233,7 +240,7 @@ static void CalcActionAreaSize(txt_window_t *window,
         if (widget != NULL)
         {
             TXT_CalcWidgetSize(widget);
-            *w += widget->w + 1;
+            *w += widget->w;
 
             if (widget->h > *h)
             {
diff --git a/textscreen/txt_window_action.c b/textscreen/txt_window_action.c
index e593b7b6..df0e4ea3 100644
--- a/textscreen/txt_window_action.c
+++ b/textscreen/txt_window_action.c
@@ -37,9 +37,10 @@ static void TXT_WindowActionSizeCalc(TXT_UNCAST_ARG(action))
 
     TXT_GetKeyDescription(action->key, buf);
 
-    // Minimum width is the string length + two spaces for padding
+    // Width is label length, plus key description length, plus '='
+    // and two surrounding spaces.
 
-    action->widget.w = strlen(action->label) + strlen(buf) + 1;
+    action->widget.w = strlen(action->label) + strlen(buf) + 3;
     action->widget.h = 1;
 }
 
@@ -50,12 +51,24 @@ static void TXT_WindowActionDrawer(TXT_UNCAST_ARG(action), int selected)
 
     TXT_GetKeyDescription(action->key, buf);
 
+    if (TXT_HoveringOverWidget(action))
+    {
+        TXT_BGColor(TXT_COLOR_BLACK, 0);
+    }
+    else
+    {
+        TXT_BGColor(TXT_WINDOW_BACKGROUND, 0);
+    }
+
+    TXT_DrawString(" ");
     TXT_FGColor(TXT_COLOR_BRIGHT_GREEN);
     TXT_DrawString(buf);
     TXT_FGColor(TXT_COLOR_BRIGHT_CYAN);
     TXT_DrawString("=");
+
     TXT_FGColor(TXT_COLOR_BRIGHT_WHITE);
     TXT_DrawString(action->label);
+    TXT_DrawString(" ");
 }
 
 static void TXT_WindowActionDestructor(TXT_UNCAST_ARG(action))
@@ -69,7 +82,7 @@ static int TXT_WindowActionKeyPress(TXT_UNCAST_ARG(action), int key)
 {
     TXT_CAST_ARG(txt_window_action_t, action);
 
-    if (key == action->key)
+    if (tolower(key) == tolower(action->key))
     {
         TXT_EmitSignal(action, "pressed");
         return 1;