Removed the confusing and unnecessary hidden bool argument to the style

drawing functions.

--HG--
extra : convert_revision : svn%3Afdd8eb12-d10e-0410-9acb-85c331704f74/trunk%402593

dlib/gui_widgets/base_widgets.h

@@ -896,7 +896,7 @@ namespace dlib
 
         void draw (
             const canvas& c
-        ) const { style->draw_button(c,rect,hidden,enabled,*mfont,lastx,lasty,name_,is_depressed()); }
+        ) const { style->draw_button(c,rect,enabled,*mfont,lastx,lasty,name_,is_depressed()); }
 
         void on_button_up (
             bool mouse_over
@@ -1204,7 +1204,7 @@ namespace dlib
                 const canvas& c
             ) const
             {
-                my_scroll_bar.style->draw_scroll_bar_background(c,rect,hidden,enabled,lastx,lasty,is_depressed());
+                my_scroll_bar.style->draw_scroll_bar_background(c,rect,enabled,lastx,lasty,is_depressed());
             }
 
             void on_button_down (
@@ -1307,7 +1307,7 @@ namespace dlib
                 const canvas& c
             ) const
             {
-                my_scroll_bar.style->draw_scroll_bar_slider(c,rect,hidden,enabled,lastx,lasty, is_being_dragged());
+                my_scroll_bar.style->draw_scroll_bar_slider(c,rect,enabled,lastx,lasty, is_being_dragged());
             }
 
             bool mouse_in_widget;

dlib/gui_widgets/style.cpp

@@ -17,7 +17,6 @@ namespace dlib
     void button_style_default::draw_button (
         const canvas& c,
         const rectangle& rect,
-        const bool hidden,
         const bool enabled,
         const font& mfont,
         const long lastx,
@@ -107,7 +106,6 @@ namespace dlib
     void button_style_toolbar1::draw_button (
         const canvas& c,
         const rectangle& rect,
-        const bool hidden,
         const bool enabled,
         const font& mfont,
         const long lastx,
@@ -206,7 +204,6 @@ namespace dlib
     void button_style_toolbar_icon1::draw_button (
         const canvas& c,
         const rectangle& rect,
-        const bool hidden,
         const bool enabled,
         const font& mfont,
         const long lastx,
@@ -405,7 +402,6 @@ namespace dlib
     draw_button (
         const canvas& c,
         const rectangle& rect,
-        const bool hidden,
         const bool enabled,
         const font& mfont,
         const long lastx,
@@ -426,7 +422,6 @@ namespace dlib
     draw_button (
         const canvas& c,
         const rectangle& rect,
-        const bool hidden,
         const bool enabled,
         const font& mfont,
         const long lastx,
@@ -447,7 +442,6 @@ namespace dlib
     draw_button (
         const canvas& c,
         const rectangle& rect,
-        const bool hidden,
         const bool enabled,
         const font& mfont,
         const long lastx,
@@ -468,7 +462,6 @@ namespace dlib
     draw_button (
         const canvas& c,
         const rectangle& rect,
-        const bool hidden,
         const bool enabled,
         const font& mfont,
         const long lastx,
@@ -490,7 +483,6 @@ namespace dlib
     void toggle_button_style_default::draw_toggle_button (
         const canvas& c,
         const rectangle& rect,
-        const bool hidden,
         const bool enabled,
         const font& mfont,
         const long lastx,
@@ -581,7 +573,6 @@ namespace dlib
     void toggle_button_style_check_box::draw_toggle_button (
         const canvas& c,
         const rectangle& rect,
-        const bool hidden,
         const bool enabled,
         const font& mfont,
         const long lastx,
@@ -674,7 +665,6 @@ namespace dlib
     void toggle_button_style_radio_button::draw_toggle_button (
         const canvas& c,
         const rectangle& rect,
-        const bool hidden,
         const bool enabled,
         const font& mfont,
         const long lastx,
@@ -850,7 +840,6 @@ namespace dlib
     draw_scroll_bar_background (
         const canvas& c,
         const rectangle& rect,
-        const bool hidden,
         const bool enabled,
         const long lastx,
         const long lasty,
@@ -869,7 +858,6 @@ namespace dlib
     draw_scroll_bar_slider (
         const canvas& c,
         const rectangle& rect,
-        const bool hidden,
         const bool enabled,
         const long lastx,
         const long lasty,

dlib/gui_widgets/style.h

@@ -46,7 +46,6 @@ namespace dlib
         virtual void draw_button (
             const canvas& c,
             const rectangle& rect,
-            const bool hidden,
             const bool enabled,
             const font& mfont,
             const long lastx,
@@ -66,7 +65,6 @@ namespace dlib
         virtual void draw_button (
             const canvas& c,
             const rectangle& rect,
-            const bool hidden,
             const bool enabled,
             const font& mfont,
             const long lastx,
@@ -100,7 +98,6 @@ namespace dlib
         virtual void draw_button (
             const canvas& c,
             const rectangle& rect,
-            const bool hidden,
             const bool enabled,
             const font& mfont,
             const long lastx,
@@ -149,7 +146,6 @@ namespace dlib
         virtual void draw_button (
             const canvas& c,
             const rectangle& rect,
-            const bool hidden,
             const bool enabled,
             const font& mfont,
             const long lastx,
@@ -223,7 +219,6 @@ namespace dlib
         virtual void draw_button (
             const canvas& c,
             const rectangle& rect,
-            const bool hidden,
             const bool enabled,
             const font& mfont,
             const long lastx,
@@ -246,7 +241,6 @@ namespace dlib
         virtual void draw_button (
             const canvas& c,
             const rectangle& rect,
-            const bool hidden,
             const bool enabled,
             const font& mfont,
             const long lastx,
@@ -269,7 +263,6 @@ namespace dlib
         virtual void draw_button (
             const canvas& c,
             const rectangle& rect,
-            const bool hidden,
             const bool enabled,
             const font& mfont,
             const long lastx,
@@ -292,7 +285,6 @@ namespace dlib
         virtual void draw_button (
             const canvas& c,
             const rectangle& rect,
-            const bool hidden,
             const bool enabled,
             const font& mfont,
             const long lastx,
@@ -335,7 +327,6 @@ namespace dlib
         virtual void draw_toggle_button (
             const canvas& c,
             const rectangle& rect,
-            const bool hidden,
             const bool enabled,
             const font& mfont,
             const long lastx,
@@ -356,7 +347,6 @@ namespace dlib
         virtual void draw_toggle_button (
             const canvas& c,
             const rectangle& rect,
-            const bool hidden,
             const bool enabled,
             const font& mfont,
             const long lastx,
@@ -389,7 +379,6 @@ namespace dlib
         virtual void draw_toggle_button (
             const canvas& c,
             const rectangle& rect,
-            const bool hidden,
             const bool enabled,
             const font& mfont,
             const long lastx,
@@ -414,7 +403,6 @@ namespace dlib
         virtual void draw_toggle_button (
             const canvas& c,
             const rectangle& rect,
-            const bool hidden,
             const bool enabled,
             const font& mfont,
             const long lastx,
@@ -462,7 +450,6 @@ namespace dlib
         virtual void draw_scroll_bar_background (
             const canvas& c,
             const rectangle& rect,
-            const bool hidden,
             const bool enabled,
             const long lastx,
             const long lasty,
@@ -472,7 +459,6 @@ namespace dlib
         virtual void draw_scroll_bar_slider (
             const canvas& c,
             const rectangle& rect,
-            const bool hidden,
             const bool enabled,
             const long lastx,
             const long lasty,
@@ -514,7 +500,6 @@ namespace dlib
         virtual void draw_scroll_bar_background (
             const canvas& c,
             const rectangle& rect,
-            const bool hidden,
             const bool enabled,
             const long lastx,
             const long lasty,
@@ -524,7 +509,6 @@ namespace dlib
         virtual void draw_scroll_bar_slider (
             const canvas& c,
             const rectangle& rect,
-            const bool hidden,
             const bool enabled,
             const long lastx,
             const long lasty,

dlib/gui_widgets/style_abstract.h

@@ -57,7 +57,6 @@ namespace dlib
         virtual void draw_button (
             const canvas& c,
             const rectangle& rect,
-            const bool hidden,
             const bool enabled,
             const font& mfont,
             const long lastx,
@@ -69,7 +68,7 @@ namespace dlib
             requires
                 - the mutex drawable::m is locked
                 - c == the canvas to draw on
-                - rect, hidden, enabled, mfont, lastx, and lasty are the variables
+                - rect, enabled, mfont, lastx, and lasty are the variables
                   defined in the protected section of the drawable class.
                 - name == the name of the button to be drawn
                 - is_depressed == true if the button is to be drawn in a depressed state
@@ -204,7 +203,6 @@ namespace dlib
         virtual void draw_toggle_button (
             const canvas& c,
             const rectangle& rect,
-            const bool hidden,
             const bool enabled,
             const font& mfont,
             const long lastx,
@@ -217,7 +215,7 @@ namespace dlib
             requires
                 - the mutex drawable::m is locked
                 - c == the canvas to draw on
-                - rect, hidden, enabled, mfont, lastx, and lasty are the variables
+                - rect, enabled, mfont, lastx, and lasty are the variables
                   defined in the protected section of the drawable class.
                 - name == the name of the button to be drawn
                 - is_depressed == true if the button is to be drawn in a depressed state
@@ -335,7 +333,6 @@ namespace dlib
         virtual void draw_scroll_bar_background (
             const canvas& c,
             const rectangle& rect,
-            const bool hidden,
             const bool enabled,
             const long lastx,
             const long lasty,
@@ -345,7 +342,7 @@ namespace dlib
             requires
                 - the mutex drawable::m is locked
                 - c == the canvas to draw on
-                - rect, hidden, enabled, lastx, and lasty are the variables
+                - rect, enabled, lastx, and lasty are the variables
                   defined in the protected section of the drawable class.
                 - is_depressed == true if the background area of the scroll_bar is to 
                   be drawn in a depressed state (because the user is clicking on it)
@@ -357,7 +354,6 @@ namespace dlib
         virtual void draw_scroll_bar_slider (
             const canvas& c,
             const rectangle& rect,
-            const bool hidden,
             const bool enabled,
             const long lastx,
             const long lasty,
@@ -367,7 +363,7 @@ namespace dlib
             requires
                 - the mutex drawable::m is locked
                 - c == the canvas to draw on
-                - rect, hidden, enabled, lastx, and lasty are the variables
+                - rect, enabled, lastx, and lasty are the variables
                   defined in the protected section of the drawable class
                 - is_being_dragged == true if the user is dragging the slider
             ensures

dlib/gui_widgets/widgets.h

@@ -274,7 +274,7 @@ namespace dlib
 
         void draw (
             const canvas& c
-        ) const { style->draw_toggle_button(c,rect,hidden,enabled,*mfont,lastx,lasty,name_,is_depressed(),checked); }
+        ) const { style->draw_toggle_button(c,rect,enabled,*mfont,lastx,lasty,name_,is_depressed(),checked); }
 
         void on_button_up (
             bool mouse_over