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highlight certain lines in a textbox(#194)

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This commit is contained in:
Jinhao
2017-04-15 11:13:32 +08:00
parent 94bb4103f8
commit f261fa296e
5 changed files with 167 additions and 5 deletions
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3
include/nana/gui/widgets/skeletons/text_editor.hpp
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@@ -90,6 +90,8 @@ namespace nana{ namespace widgets
void set_keyword(const ::std::wstring& kw, const std::string& name, bool case_sensitive, bool whole_word_matched);
void erase_keyword(const ::std::wstring& kw);
colored_area_access_interface& colored_area();
void set_accept(std::function<bool(char_type)>);
void set_accept(accepts);
bool respond_char(const arg_keyboard& arg);
@@ -211,6 +213,7 @@ namespace nana{ namespace widgets
bool try_refresh();
private:
nana::color _m_draw_colored_area(paint::graphics& graph, std::size_t line_pos);
std::vector<upoint> _m_render_text(const ::nana::color& text_color);
void _m_pre_calc_lines(std::size_t line_off, std::size_t lines);

23
include/nana/gui/widgets/skeletons/text_editor_part.hpp
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@@ -40,6 +40,29 @@ namespace nana
virtual void text_exposed(const std::vector<upoint>&) = 0;
};
struct colored_area_type
{
const ::std::size_t begin; ///< The begin line position
::std::size_t count; ///< The number of lines
::nana::color bgcolor;
::nana::color fgcolor;
};
class colored_area_access_interface
{
public:
using colored_area_type = skeletons::colored_area_type;
virtual ~colored_area_access_interface();
virtual std::shared_ptr<colored_area_type> get(std::size_t line_pos) = 0;
virtual bool clear() = 0;
virtual bool remove(std::size_t line_pos) = 0;
virtual std::size_t size() const = 0;
virtual std::shared_ptr<colored_area_type> at(std::size_t index) = 0;
};
}
}
}

7
include/nana/gui/widgets/textbox.hpp
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@@ -100,9 +100,12 @@ namespace nana
:public widget_object<category::widget_tag, drawerbase::textbox::drawer, drawerbase::textbox::textbox_events, ::nana::widgets::skeletons::text_editor_scheme>
{
public:
using text_focus_behavior = widgets::skeletons::text_focus_behavior;
using colored_area_type = widgets::skeletons::colored_area_type;
using colored_area_access_interface = widgets::skeletons::colored_area_access_interface;
using text_focus_behavior = widgets::skeletons::text_focus_behavior;
using text_positions = std::vector<upoint>;
/// The default constructor without creating the widget.
textbox();
@@ -134,6 +137,8 @@ namespace nana
void store(std::string file);
void store(std::string file, nana::unicode encoding);
colored_area_access_interface* colored_area_access();
/// Enables/disables the textbox to indent a line. Idents a new line when it is created by pressing enter.
/// @param generator generates text for identing a line. If it is empty, textbox indents the line according to last line.
textbox& indention(bool, std::function<std::string()> generator = {});