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Return Widget::children() by reference.

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This commit is contained in:
Jared Boone 2016-02-07 11:24:25 -08:00
parent 2b6bc03408
commit 5a66c68861
2 changed files with 9 additions and 5 deletions
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8
firmware/common/ui_widget.cpp
View File

@ -46,6 +46,8 @@ bool is_dirty() {
/* Widget ****************************************************************/ /* Widget ****************************************************************/
const std::vector<Widget*> Widget::no_children { };
Point Widget::screen_pos() { Point Widget::screen_pos() {
return screen_rect().pos; return screen_rect().pos;
} }
@ -153,8 +155,8 @@ bool Widget::on_touch(const TouchEvent event) {
return false; return false;
} }
const std::vector<Widget*> Widget::children() const { const std::vector<Widget*>& Widget::children() const {
return { }; return no_children;
} }
Context& Widget::context() const { Context& Widget::context() const {
@ -244,7 +246,7 @@ void View::remove_child(Widget* const widget) {
} }
} }
const std::vector<Widget*> View::children() const { const std::vector<Widget*>& View::children() const {
return children_; return children_;
} }

6
firmware/common/ui_widget.hpp
View File

@ -94,7 +94,7 @@ public:
virtual bool on_key(const KeyEvent event); virtual bool on_key(const KeyEvent event);
virtual bool on_encoder(const EncoderEvent event); virtual bool on_encoder(const EncoderEvent event);
virtual bool on_touch(const TouchEvent event); virtual bool on_touch(const TouchEvent event);
virtual const std::vector<Widget*> children() const; virtual const std::vector<Widget*>& children() const;
virtual Context& context() const; virtual Context& context() const;
@ -136,6 +136,8 @@ private:
.highlighted = false, .highlighted = false,
.visible = false, .visible = false,
}; };
static const std::vector<Widget*> no_children;
}; };
class View : public Widget { class View : public Widget {
@ -154,7 +156,7 @@ public:
void add_child(Widget* const widget); void add_child(Widget* const widget);
void add_children(const std::vector<Widget*>& children); void add_children(const std::vector<Widget*>& children);
void remove_child(Widget* const widget); void remove_child(Widget* const widget);
const std::vector<Widget*> children() const override; const std::vector<Widget*>& children() const override;
virtual std::string title() const; virtual std::string title() const;