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add textbox::set_undo_queue_length

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a new method for setting the undo queue length
This commit is contained in:
Jinhao 2016-09-22 08:03:30 +08:00
parent 74e113b2cc
commit c916d0ace3
4 changed files with 28 additions and 0 deletions
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9
include/nana/gui/widgets/skeletons/text_editor.hpp
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@ -52,7 +52,15 @@ namespace nana{ namespace widgets
{ {
max_steps_ = maxs; max_steps_ = maxs;
if (maxs && (commands_.size() >= maxs)) if (maxs && (commands_.size() >= maxs))
{
auto move = commands_.size() - pos_;
commands_.erase(commands_.begin(), commands_.begin() + (commands_.size() - maxs + 1)); commands_.erase(commands_.begin(), commands_.begin() + (commands_.size() - maxs + 1));
pos_ = commands_.size() - std::min(move, commands_.size());
}
else if (0 == maxs)
{
clear();
}
} }
std::size_t max_steps() const std::size_t max_steps() const
@ -258,6 +266,7 @@ namespace nana{ namespace widgets
void del(); void del();
void backspace(bool record_undo = true); void backspace(bool record_undo = true);
void undo(bool reverse); void undo(bool reverse);
void set_undo_queue_length(std::size_t len);
void move_ns(bool to_north); //Moves up and down void move_ns(bool to_north); //Moves up and down
void move_left(); void move_left();
void move_right(); void move_right();

6
include/nana/gui/widgets/textbox.hpp
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@ -228,6 +228,12 @@ namespace nana
/// E.g. Whether caret moves to left of selected content or moves to left of last position when left arrow key is pressed. /// E.g. Whether caret moves to left of selected content or moves to left of last position when left arrow key is pressed.
/// @param move_to_end determines whether to move caret to left of selected_content or to left of last position. /// @param move_to_end determines whether to move caret to left of selected_content or to left of last position.
void select_behavior(bool move_to_end); void select_behavior(bool move_to_end);
/// Sets the undo/redo queue length
/**
* @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);
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;

5
source/gui/widgets/skeletons/text_editor.cpp
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@ -2348,6 +2348,11 @@ namespace nana{ namespace widgets
_m_scrollbar(); _m_scrollbar();
} }
void text_editor::set_undo_queue_length(std::size_t len)
{
undo_.max_steps(len);
}
void text_editor::move_ns(bool to_north) void text_editor::move_ns(bool to_north)
{ {
const bool redraw_required = _m_cancel_select(0); const bool redraw_required = _m_cancel_select(0);

8
source/gui/widgets/textbox.cpp
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@ -606,6 +606,14 @@ namespace drawerbase {
editor->select_behavior(move_to_end); editor->select_behavior(move_to_end);
} }
void textbox::set_undo_queue_length(std::size_t len)
{
internal_scope_guard lock;
auto editor = get_drawer_trigger().editor();
if (editor)
editor->set_undo_queue_length(len);
}
//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
{ {