#include <OptionList.h>
Public Member Functions | |
OptionList (WContainerWidget *parent=0) | |
Create an OptionList. | |
void | add (Option *option) |
Add an Option to the list. | |
void | update () |
Updates the stateless implementations after an Option has been hidden or shown. | |
Private Member Functions | |
void | optionVisibilityChanged (Option *opt, bool hidden) |
An option changed visibility: possibly update the separators inbetween. | |
Private Attributes | |
std::vector< Option * > | options_ |
The list of options. | |
Option * | optionNeedReset_ |
The option that needs its stateless code updated. | |
Friends | |
class | Option |
This widget is part of the Wt composer example.
An OptionList displays a list of Option widgets, which are separated by a '|' separator.
For example, Foo | Bar | Huu
When Options are hidden, the separators are adjusted so that there is no separator after the last visible option. However, this requires a call of update() each time an option is hidden or shown. This is because the removing of separators is optimized in stateless implementations, and thus in client-side JavaScript code. Since the behaviour is not entirely stateless, the update() method resets stateless implementations if necessary.
Definition at line 40 of file OptionList.h.
OptionList::OptionList | ( | WContainerWidget * | parent = 0 |
) |
Create an OptionList.
Definition at line 11 of file OptionList.C.
00012 : WContainerWidget(parent), 00013 optionNeedReset_(0) 00014 { 00015 resize(WLength::Auto, WLength(2.5, WLength::FontEx)); 00016 }
void OptionList::add | ( | Option * | option | ) |
Add an Option to the list.
Definition at line 18 of file OptionList.C.
00019 { 00020 addWidget(option); 00021 option->setOptionList(this); 00022 00023 if (!options_.empty()) { 00024 options_.back()->addSeparator(); 00025 } 00026 00027 options_.push_back(option); 00028 }
void OptionList::update | ( | ) |
Updates the stateless implementations after an Option has been hidden or shown.
Definition at line 30 of file OptionList.C.
00031 { 00032 if (optionNeedReset_ != 0) 00033 optionNeedReset_->resetLearnedSlots(); 00034 00035 optionNeedReset_ = 0; 00036 }
void OptionList::optionVisibilityChanged | ( | Option * | opt, | |
bool | hidden | |||
) | [private] |
An option changed visibility: possibly update the separators inbetween.
Definition at line 38 of file OptionList.C.
00039 { 00040 /* 00041 * Check if it was the last visible option, in that case the second last 00042 * visible option loses its separator. 00043 */ 00044 for (unsigned i = options_.size() - 1; i > 0; --i) { 00045 if (options_[i] == opt) { 00046 for (int j = i - 1; j >= 0; --j) { 00047 if (!options_[j]->isHidden()) { 00048 if (hidden) 00049 options_[j]->hideSeparator(); 00050 else 00051 options_[j]->showSeparator(); 00052 break; 00053 } 00054 } 00055 break; 00056 } else 00057 if (!options_[i]->isHidden()) 00058 break; 00059 } 00060 00061 /* 00062 * The Option to the right needs to relearn its stateless 00063 * slot code for hide() and show(). 00064 */ 00065 for (unsigned i = 0; i < options_.size(); ++i) { 00066 if (options_[i] == opt) { 00067 for (unsigned j = i + 1; j < options_.size(); ++j) { 00068 if (!options_[j]->isHidden()) { 00069 optionNeedReset_ = options_[j]; 00070 break; 00071 } 00072 } 00073 00074 break; 00075 } 00076 } 00077 }
friend class Option [friend] |
Definition at line 66 of file OptionList.h.
std::vector<Option *> OptionList::options_ [private] |
Option* OptionList::optionNeedReset_ [private] |