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add new methods to textbox for line count

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This commit is contained in:
Jinhao 2017-06-18 05:08:51 +08:00
parent 33321d73de
commit b5db21567f
4 changed files with 41 additions and 0 deletions
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2
include/nana/gui/widgets/skeletons/text_editor.hpp
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@ -183,6 +183,8 @@ namespace nana{ namespace widgets
void focus_behavior(text_focus_behavior); void focus_behavior(text_focus_behavior);
void select_behavior(bool move_to_end); void select_behavior(bool move_to_end);
std::size_t line_count(bool text_lines) const;
public: public:
void draw_corner(); void draw_corner();
void render(bool focused); void render(bool focused);

11
include/nana/gui/widgets/textbox.hpp
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@ -257,6 +257,17 @@ namespace nana
* @param len The length of the queue. If this parameter is zero, the undo/redo is disabled. * @param len The length of the queue. If this parameter is zero, the undo/redo is disabled.
*/ */
void set_undo_queue_length(std::size_t len); void set_undo_queue_length(std::size_t len);
/// Returns the number of lines that text are displayed in the screen.
/**
* The number of display lines may be not equal to the number of text lines when the textbox
* is line wrapped mode.
* @return the number of lines that text are displayed in the screen.
*/
std::size_t display_line_count() const;
/// Returns the number of text lines.
std::size_t text_line_count() const;
protected: protected:
//Overrides widget's virtual functions //Overrides widget's virtual functions
native_string_type _m_caption() const throw() override; native_string_type _m_caption() const throw() override;

8
source/gui/widgets/skeletons/text_editor.cpp
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@ -1872,6 +1872,14 @@ namespace nana{ namespace widgets
select_.move_to_end = move_to_end; select_.move_to_end = move_to_end;
} }
std::size_t text_editor::line_count(bool text_lines) const
{
if (text_lines)
return textbase().lines();
return impl_->capacities.behavior->take_lines();
}
void text_editor::draw_corner() void text_editor::draw_corner()
{ {
impl_->cview->draw_corner(graph_); impl_->cview->draw_corner(graph_);

20
source/gui/widgets/textbox.cpp
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@ -720,6 +720,26 @@ namespace drawerbase {
editor->set_undo_queue_length(len); editor->set_undo_queue_length(len);
} }
std::size_t textbox::display_line_count() const
{
internal_scope_guard lock;
auto editor = get_drawer_trigger().editor();
if (editor)
return editor->line_count(false);
return 0;
}
std::size_t textbox::text_line_count() const
{
internal_scope_guard lock;
auto editor = get_drawer_trigger().editor();
if (editor)
return editor->line_count(true);
return 0;
}
//Override _m_caption for caption() //Override _m_caption for caption()
auto textbox::_m_caption() const throw() -> native_string_type auto textbox::_m_caption() const throw() -> native_string_type
{ {