GUI2: removed unused offset parameters from drawing functions

These were added in 8f945cf235, but since the "new" listbox
implementation never came to be, these have just been unused clutter. There was one place
they were used as parameters in a manual call to calculate_blitting_rectangle, but that was
refactored out in 3332ae9757.

This also removes an overload of widget::draw_debug_border, since without the offsets, both
functions now did the same thing.

This affects:
* widget::draw_background
* widget::draw_children
* widget::draw_foreground
* widget::impl_draw_background (offset overload removed)
* widget::impl_draw_children
* widget::impl_draw_foreground
* widget::calculate_blitting_rectangle
* widget::calculate_clipping_rectangle
* widget::draw_debug_border

src/gui/widgets/container_base.cpp

@@ -194,12 +194,12 @@ void container_base::set_visible_rectangle(const SDL_Rect& rectangle)
 	grid_.set_visible_rectangle(rectangle);
 }
 
-void container_base::impl_draw_children(int x_offset, int y_offset)
+void container_base::impl_draw_children()
 {
 	assert(get_visible() == widget::visibility::visible
 		   && grid_.get_visible() == widget::visibility::visible);
 
-	grid_.draw_children(x_offset, y_offset);
+	grid_.draw_children();
 }
 
 void container_base::layout_children()

src/gui/widgets/container_base.hpp

@@ -107,7 +107,7 @@ public:
 	virtual void set_visible_rectangle(const SDL_Rect& rectangle) override;
 
 	/** See @ref widget::impl_draw_children. */
-	virtual void impl_draw_children(int x_offset, int y_offset) override;
+	virtual void impl_draw_children() override;
 
 protected:
 	/** See @ref widget::layout_children. */

src/gui/widgets/generator.hpp

@@ -279,7 +279,7 @@ public:
 	virtual void set_visible_rectangle(const SDL_Rect& rectangle) override = 0;
 
 	/** See @ref widget::impl_draw_children. */
-	virtual void impl_draw_children(int x_offset, int y_offset) override = 0;
+	virtual void impl_draw_children() override = 0;
 
 	/** See @ref widget::find_at. */
 	virtual widget* find_at(const point& coordinate,

src/gui/widgets/generator_private.hpp

@@ -826,7 +826,7 @@ public:
 	}
 
 	/** See @ref widget::impl_draw_children. */
-	virtual void impl_draw_children(int x_offset, int y_offset) override
+	virtual void impl_draw_children() override
 	{
 		assert(this->get_visible() == widget::visibility::visible);
 
@@ -836,7 +836,7 @@ public:
 			child* item = items_[index].get();
 
 			if(item->child_grid.get_visible() == widget::visibility::visible && item->shown) {
-				item->child_grid.draw_children(x_offset, y_offset);
+				item->child_grid.draw_children();
 			}
 		}
 	}

src/gui/widgets/grid.cpp

@@ -975,7 +975,7 @@ void grid::layout(const point& origin)
 	}
 }
 
-void grid::impl_draw_children(int x_offset, int y_offset)
+void grid::impl_draw_children()
 {
 	/*
 	 * The call to SDL_PumpEvents seems a bit like black magic.
@@ -1003,9 +1003,9 @@ void grid::impl_draw_children(int x_offset, int y_offset)
 			continue;
 		}
 
-		widget->draw_background(x_offset, y_offset);
-		widget->draw_children(x_offset, y_offset);
-		widget->draw_foreground(x_offset, y_offset);
+		widget->draw_background();
+		widget->draw_children();
+		widget->draw_foreground();
 	}
 }
 

src/gui/widgets/grid.hpp

@@ -547,7 +547,7 @@ private:
 	void layout(const point& origin);
 
 	/** See @ref widget::impl_draw_children. */
-	virtual void impl_draw_children(int x_offset, int y_offset) override;
+	virtual void impl_draw_children() override;
 };
 
 /**

src/gui/widgets/matrix.cpp

@@ -111,10 +111,9 @@ void matrix::layout_initialize(const bool full_initialization)
 	content_.layout_initialize(full_initialization);
 }
 
-void
-matrix::impl_draw_children(int x_offset, int y_offset)
+void matrix::impl_draw_children()
 {
-	content_.draw_children(x_offset, y_offset);
+	content_.draw_children();
 }
 
 void matrix::layout_children()

src/gui/widgets/matrix.hpp

@@ -121,7 +121,7 @@ public:
 	virtual void layout_initialize(const bool full_initialization) override;
 
 	/** See @ref widget::impl_draw_children. */
-	virtual void impl_draw_children(int x_offset, int y_offset) override;
+	virtual void impl_draw_children() override;
 
 	/** See @ref widget::layout_children. */
 	virtual void layout_children() override;

src/gui/widgets/multi_page.cpp

@@ -144,7 +144,7 @@ void multi_page::finalize(const std::vector<string_map>& page_data)
 	swap_grid(nullptr, &get_grid(), generator_, "_content_grid");
 }
 
-void multi_page::impl_draw_background(int /*x_offset*/, int /*y_offset*/)
+void multi_page::impl_draw_background()
 {
 	/* DO NOTHING */
 }

src/gui/widgets/multi_page.hpp

@@ -201,7 +201,7 @@ private:
 	std::map<std::string, builder_grid_const_ptr> page_builders_;
 
 	/** See @ref widget::impl_draw_background. */
-	virtual void impl_draw_background(int x_offset, int y_offset) override;
+	virtual void impl_draw_background() override;
 
 	/** Inherited from styled_widget, implemented by REGISTER_WIDGET. */
 	virtual const std::string& get_control_type() const override;

src/gui/widgets/pane.cpp

@@ -186,14 +186,14 @@ void pane::layout_initialize(const bool full_initialization)
 }
 
 void
-pane::impl_draw_children(int x_offset, int y_offset)
+pane::impl_draw_children()
 {
 	DBG_GUI_D << LOG_HEADER << '\n';
 
 	for(auto & item : items_)
 	{
 		if(item.item_grid->get_visible() != widget::visibility::invisible) {
-			item.item_grid->draw_children(x_offset, y_offset);
+			item.item_grid->draw_children();
 		}
 	}
 }

src/gui/widgets/pane.hpp

@@ -74,7 +74,7 @@ public:
 	virtual void layout_initialize(const bool full_initialization) override;
 
 	/** See @ref widget::impl_draw_children. */
-	virtual void impl_draw_children(int x_offset, int y_offset) override;
+	virtual void impl_draw_children() override;
 
 	/** See @ref widget::request_reduce_width. */
 	virtual void request_reduce_width(const unsigned maximum_width) override;

src/gui/widgets/panel.cpp

@@ -64,14 +64,14 @@ unsigned panel::get_state() const
 	return 0;
 }
 
-void panel::impl_draw_background(int /*x_offset*/, int /*y_offset*/)
+void panel::impl_draw_background()
 {
 	DBG_GUI_D << LOG_HEADER << " size " << get_rectangle() << ".\n";
 
 	get_canvas(0).render();
 }
 
-void panel::impl_draw_foreground(int /*x_offset*/, int /*y_offset*/)
+void panel::impl_draw_foreground()
 {
 	DBG_GUI_D << LOG_HEADER << " size " << get_rectangle() << ".\n";
 

src/gui/widgets/panel.hpp

@@ -53,10 +53,10 @@ public:
 
 private:
 	/** See @ref widget::impl_draw_background. */
-	virtual void impl_draw_background(int x_offset, int y_offset) override;
+	virtual void impl_draw_background() override;
 
 	/** See @ref widget::impl_draw_foreground. */
-	virtual void impl_draw_foreground(int x_offset, int y_offset) override;
+	virtual void impl_draw_foreground() override;
 
 	/** Inherited from styled_widget, implemented by REGISTER_WIDGET. */
 	virtual const std::string& get_control_type() const override;

src/gui/widgets/scrollbar_container.cpp

@@ -785,14 +785,14 @@ void scrollbar_container::set_horizontal_scrollbar_mode(const scrollbar_mode scr
 	}
 }
 
-void scrollbar_container::impl_draw_children(int x_offset, int y_offset)
+void scrollbar_container::impl_draw_children()
 {
 	assert(get_visible() == widget::visibility::visible && content_grid_->get_visible() == widget::visibility::visible);
 
 	// Inherited.
-	container_base::impl_draw_children(x_offset, y_offset);
+	container_base::impl_draw_children();
 
-	content_grid_->draw_children( x_offset, y_offset);
+	content_grid_->draw_children();
 }
 
 void scrollbar_container::layout_children()

src/gui/widgets/scrollbar_container.hpp

@@ -506,7 +506,7 @@ private:
 	virtual void layout_children() override;
 
 	/** See @ref widget::impl_draw_children. */
-	virtual void impl_draw_children(int x_offset, int y_offset) override;
+	virtual void impl_draw_children() override;
 
 	/**
 	 * Sets the size of the content grid.

src/gui/widgets/spacer.cpp

@@ -96,7 +96,7 @@ bool spacer::disable_click_dismiss() const
 	return false;
 }
 
-void spacer::impl_draw_background(int /*x_offset*/, int /*y_offset*/)
+void spacer::impl_draw_background()
 {
 	/* DO NOTHING */
 }

src/gui/widgets/spacer.hpp

@@ -79,7 +79,7 @@ private:
 	bool fills_available_space();
 
 	/** See @ref widget::impl_draw_background. */
-	virtual void impl_draw_background(int x_offset, int y_offset) override;
+	virtual void impl_draw_background() override;
 
 	/** Inherited from styled_widget, implemented by REGISTER_WIDGET. */
 	virtual const std::string& get_control_type() const override;

src/gui/widgets/styled_widget.cpp

@@ -407,7 +407,7 @@ int styled_widget::get_text_maximum_height() const
 	return get_height() - config_->text_extra_height;
 }
 
-void styled_widget::impl_draw_background(int /*x_offset*/, int /*y_offset*/)
+void styled_widget::impl_draw_background()
 {
 	DBG_GUI_D << LOG_HEADER << " label '" << debug_truncate(label_) << "' size "
 			  << get_rectangle() << ".\n";
@@ -415,7 +415,7 @@ void styled_widget::impl_draw_background(int /*x_offset*/, int /*y_offset*/)
 	get_canvas(get_state()).render();
 }
 
-void styled_widget::impl_draw_foreground(int /*x_offset*/, int /*y_offset*/)
+void styled_widget::impl_draw_foreground()
 {
 	/* DO NOTHING */
 }

src/gui/widgets/styled_widget.hpp

@@ -412,10 +412,10 @@ public:
 
 protected:
 	/** See @ref widget::impl_draw_background. */
-	virtual void impl_draw_background(int x_offset, int y_offset) override;
+	virtual void impl_draw_background() override;
 
 	/** See @ref widget::impl_draw_foreground. */
-	virtual void impl_draw_foreground(int x_offset, int y_offset) override;
+	virtual void impl_draw_foreground() override;
 
 	/** Exposes font::pango_text::get_token, for the text label of this styled_widget */
 	std::string get_label_token(const point & position, const char * delimiters = " \n\r\t") const;

src/gui/widgets/toggle_panel.cpp

@@ -191,18 +191,18 @@ void toggle_panel::set_state(const state_t state)
 	assert(conf);
 }
 
-void toggle_panel::impl_draw_background(int x_offset, int y_offset)
+void toggle_panel::impl_draw_background()
 {
 	// We don't have a fore and background and need to draw depending on
 	// our state, like a styled_widget. So we use the styled_widget's drawing method.
-	styled_widget::impl_draw_background(x_offset, y_offset);
+	styled_widget::impl_draw_background();
 }
 
-void toggle_panel::impl_draw_foreground(int x_offset, int y_offset)
+void toggle_panel::impl_draw_foreground()
 {
 	// We don't have a fore and background and need to draw depending on
 	// our state, like a styled_widget. So we use the styled_widget's drawing method.
-	styled_widget::impl_draw_foreground(x_offset, y_offset);
+	styled_widget::impl_draw_foreground();
 }
 
 void toggle_panel::signal_handler_mouse_enter(const event::ui_event event,

src/gui/widgets/toggle_panel.hpp

@@ -148,10 +148,10 @@ private:
 	std::function<void(widget&)> callback_mouse_left_double_click_;
 
 	/** See @ref widget::impl_draw_background. */
-	virtual void impl_draw_background(int x_offset, int y_offset) override;
+	virtual void impl_draw_background() override;
 
 	/** See @ref widget::impl_draw_foreground. */
-	virtual void impl_draw_foreground(int x_offset, int y_offset) override;
+	virtual void impl_draw_foreground() override;
 
 	/** Inherited from styled_widget, implemented by REGISTER_WIDGET. */
 	virtual const std::string& get_control_type() const override;

src/gui/widgets/tree_view_node.cpp

@@ -549,16 +549,16 @@ void tree_view_node::set_visible_rectangle(const SDL_Rect& rectangle)
 	}
 }
 
-void tree_view_node::impl_draw_children(int x_offset, int y_offset)
+void tree_view_node::impl_draw_children()
 {
-	grid_.draw_children(x_offset, y_offset);
+	grid_.draw_children();
 
 	if(is_folded()) {
 		return;
 	}
 
 	for(auto & node : children_) {
-		node->impl_draw_children(x_offset, y_offset);
+		node->impl_draw_children();
 	}
 }
 

src/gui/widgets/tree_view_node.hpp

@@ -275,7 +275,7 @@ private:
 	virtual void set_visible_rectangle(const SDL_Rect& rectangle) override;
 
 	/** See @ref widget::impl_draw_children. */
-	virtual void impl_draw_children(int x_offset, int y_offset) override;
+	virtual void impl_draw_children() override;
 
 	// FIXME rename to icon
 	void signal_handler_left_button_click(const event::ui_event event);

src/gui/widgets/viewport.cpp

@@ -120,16 +120,12 @@ void viewport::layout_initialize(const bool full_initialization)
 	}
 }
 
-void
-viewport::impl_draw_children(int x_offset, int y_offset)
+void viewport::impl_draw_children()
 {
-	x_offset += get_x();
-	y_offset += get_y();
-
 	if(widget_.get_visible() != widget::visibility::invisible) {
-		widget_.draw_background(x_offset, y_offset);
-		widget_.draw_children(x_offset, y_offset);
-		widget_.draw_foreground(x_offset, y_offset);
+		widget_.draw_background();
+		widget_.draw_children();
+		widget_.draw_foreground();
 	}
 }
 

src/gui/widgets/viewport.hpp

@@ -54,7 +54,7 @@ public:
 	virtual void layout_initialize(const bool full_initialization) override;
 
 	/** See @ref widget::impl_draw_children. */
-	virtual void impl_draw_children(int x_offset, int y_offset) override;
+	virtual void impl_draw_children() override;
 
 	/** See @ref widget::request_reduce_width. */
 	virtual void request_reduce_width(const unsigned maximum_width) override;

src/gui/widgets/widget.cpp

@@ -341,20 +341,14 @@ void widget::set_linked_group(const std::string& linked_group)
 
 /***** ***** ***** ***** Drawing functions. ***** ***** ***** *****/
 
-SDL_Rect widget::calculate_blitting_rectangle(const int x_offset, const int y_offset) const
+SDL_Rect widget::calculate_blitting_rectangle() const
 {
-	SDL_Rect result = get_rectangle();
-	result.x += x_offset;
-	result.y += y_offset;
-	return result;
+	return get_rectangle();
 }
 
-SDL_Rect widget::calculate_clipping_rectangle(const int x_offset, const int y_offset) const
+SDL_Rect widget::calculate_clipping_rectangle() const
 {
-	SDL_Rect result = clipping_rectangle_;
-	result.x += x_offset;
-	result.y += y_offset;
-	return result;
+	return clipping_rectangle_;
 }
 
 namespace
@@ -365,11 +359,11 @@ namespace
 class viewport_and_clip_rect_setter
 {
 public:
-	viewport_and_clip_rect_setter(const widget& widget, int x_offset, int y_offset)
+	explicit viewport_and_clip_rect_setter(const widget& widget)
 		: renderer_(CVideo::get_singleton().get_renderer())
 	{
 		// Set viewport.
-		const SDL_Rect dst_rect = widget.calculate_blitting_rectangle(x_offset, y_offset);
+		const SDL_Rect dst_rect = widget.calculate_blitting_rectangle();
 		SDL_RenderSetViewport(renderer_, &dst_rect);
 
 		// Set clip rect, if appropriate.
@@ -377,7 +371,7 @@ public:
 			return;
 		}
 
-		SDL_Rect clip_rect = widget.calculate_clipping_rectangle(x_offset, y_offset);
+		SDL_Rect clip_rect = widget.calculate_clipping_rectangle();
 
 		// Adjust clip rect origin to match the viewport origin. Currently, the both rects are mapped to
 		// absolute screen coordinates. However, setting the viewport essentially moves the screen origin,
@@ -406,32 +400,32 @@ private:
  * Currently they're only needed by the minimap.
  */
 
-void widget::draw_background(int x_offset, int y_offset)
+void widget::draw_background()
 {
 	assert(visible_ == visibility::visible);
 
-	viewport_and_clip_rect_setter setter(*this, x_offset, y_offset);
+	viewport_and_clip_rect_setter setter(*this);
 
-	draw_debug_border(x_offset, y_offset);
-	impl_draw_background(x_offset, y_offset);
+	draw_debug_border();
+	impl_draw_background();
 }
 
-void widget::draw_children(int x_offset, int y_offset)
+void widget::draw_children()
 {
 	assert(visible_ == visibility::visible);
 
-	viewport_and_clip_rect_setter setter(*this, x_offset, y_offset);
+	viewport_and_clip_rect_setter setter(*this);
 
-	impl_draw_children(x_offset, y_offset);
+	impl_draw_children();
 }
 
-void widget::draw_foreground(int x_offset, int y_offset)
+void widget::draw_foreground()
 {
 	assert(visible_ == visibility::visible);
 
-	viewport_and_clip_rect_setter setter(*this, x_offset, y_offset);
+	viewport_and_clip_rect_setter setter(*this);
 
-	impl_draw_foreground(x_offset, y_offset);
+	impl_draw_foreground();
 }
 
 SDL_Rect widget::get_dirty_rectangle() const
@@ -500,33 +494,10 @@ void widget::set_debug_border_color(const color_t debug_border_color)
 }
 
 void widget::draw_debug_border()
-{
-	SDL_Rect r = redraw_action_ == redraw_action::partly ? clipping_rectangle_
-														  : get_rectangle();
-
-	switch(debug_border_mode_) {
-		case 0:
-			/* DO NOTHING */
-			break;
-		case 1:
-			sdl::draw_rectangle(r, debug_border_color_);
-			break;
-
-		case 2:
-			sdl::fill_rectangle(r, debug_border_color_);
-			break;
-
-		default:
-			assert(false);
-	}
-}
-
-void
-widget::draw_debug_border(int x_offset, int y_offset)
 {
 	SDL_Rect r = redraw_action_ == redraw_action::partly
-						 ? calculate_clipping_rectangle(x_offset, y_offset)
-						 : calculate_blitting_rectangle(x_offset, y_offset);
+		? calculate_clipping_rectangle()
+		: calculate_blitting_rectangle();
 
 	switch(debug_border_mode_) {
 		case 0:

src/gui/widgets/widget.hpp

@@ -508,12 +508,9 @@ public:
 	 * The blitting rectangle is the entire widget rectangle, but offsetted for
 	 * drawing position.
 	 *
-	 * @param x_offset            The offset in the x-direction when drawn.
-	 * @param y_offset            The offset in the y-direction when drawn.
-	 *
 	 * @returns                   The drawing rectangle.
 	 */
-	SDL_Rect calculate_blitting_rectangle(const int x_offset, const int y_offset) const;
+	SDL_Rect calculate_blitting_rectangle() const;
 
 	/**
 	 * Calculates the clipping rectangle of the widget.
@@ -522,25 +519,17 @@ public:
 	 * @ref redraw_action::partly. Since the drawing can be offsetted it also
 	 * needs offset parameters.
 	 *
-	 * @param x_offset            The offset in the x-direction when drawn.
-	 * @param y_offset            The offset in the y-direction when drawn.
-	 *
 	 * @returns                   The clipping rectangle.
 	 */
-	SDL_Rect calculate_clipping_rectangle(const int x_offset, const int y_offset) const;
+	SDL_Rect calculate_clipping_rectangle() const;
 
 	/**
 	 * Draws the background of a widget.
 	 *
 	 * Derived should override @ref impl_draw_background instead of changing
 	 * this function.
-	 *
-	 * @param x_offset            The offset in the x-direction in the
-	 *                            @p frame_buffer to draw.
-	 * @param y_offset            The offset in the y-direction in the
-	 *                            @p frame_buffer to draw.
 	 */
-	void draw_background(int x_offset, int y_offset);
+	void draw_background();
 
 	/**
 	 * Draws the children of a widget.
@@ -549,13 +538,8 @@ public:
 	 *
 	 * Derived should override @ref impl_draw_children instead of changing
 	 * this function.
-	 *
-	 * @param x_offset            The offset in the x-direction in the
-	 *                            @p frame_buffer to draw.
-	 * @param y_offset            The offset in the y-direction in the
-	 *                            @p frame_buffer to draw.
 	 */
-	void draw_children(int x_offset, int y_offset);
+	void draw_children();
 
 	/**
 	 * Draws the foreground of the widget.
@@ -565,13 +549,8 @@ public:
 	 *
 	 * Derived should override @ref impl_draw_foreground instead of changing
 	 * this function.
-	 *
-	 * @param x_offset            The offset in the x-direction in the
-	 *                            @p frame_buffer to draw.
-	 * @param y_offset            The offset in the y-direction in the
-	 *                            @p frame_buffer to draw.
 	 */
-	void draw_foreground(int x_offset, int y_offset);
+	void draw_foreground();
 
 private:
 	/** See @ref draw_background. */
@@ -579,17 +558,13 @@ private:
 	{
 	}
 
-	virtual void impl_draw_background(int /*x_offset*/, int /*y_offset*/)
-	{
-	}
-
 	/** See @ref draw_children. */
-	virtual void impl_draw_children(int /*x_offset*/, int /*y_offset*/)
+	virtual void impl_draw_children()
 	{
 	}
 
 	/** See @ref draw_foreground. */
-	virtual void impl_draw_foreground(int /*x_offset*/, int /*y_offset*/)
+	virtual void impl_draw_foreground()
 	{
 	}
 
@@ -654,7 +629,6 @@ private:
 	color_t debug_border_color_;
 
 	void draw_debug_border();
-	void draw_debug_border(int x_offset, int y_offset);
 
 	/***** ***** ***** ***** Query functions ***** ***** ***** *****/
 

src/gui/widgets/window.cpp

@@ -582,13 +582,13 @@ void window::draw()
 	}
 
 	// Draw background.
-	this->draw_background(0, 0);
+	this->draw_background();
 
 	// Draw children.
-	this->draw_children(0, 0);
+	this->draw_children();
 
 	// Draw foreground.
-	this->draw_foreground(0, 0);
+	this->draw_foreground();
 
 
 	if(callback_next_draw_ != nullptr) {