LogicSignal: Added an icon cache

[pulseview.git] / pv / view / logicsignal.cpp

diff --git a/pv/view/logicsignal.cpp b/pv/view/logicsignal.cpp
index b3901363548cff82686412fe070bad4f60c2d254..4b07c568d90268dcccb5b5c25c251e07902c45ff 100644 (file)
--- a/pv/view/logicsignal.cpp
+++ b/pv/view/logicsignal.cpp
@@ -241,38 +241,50 @@ void LogicSignal::paint_caps(QPainter &p, QLineF *const lines,
 
 void LogicSignal::init_trigger_actions(QWidget *parent)
 {
-       trigger_none_ = new QAction(QIcon(":/icons/trigger-none.svg"),
+       trigger_none_ = new QAction(*get_icon(":/icons/trigger-none.svg"),
                tr("No trigger"), parent);
        trigger_none_->setCheckable(true);
        connect(trigger_none_, SIGNAL(triggered()), this, SLOT(on_trigger()));
 
-       trigger_rising_ = new QAction(QIcon(":/icons/trigger-rising.svg"),
+       trigger_rising_ = new QAction(*get_icon(":/icons/trigger-rising.svg"),
                tr("Trigger on rising edge"), parent);
        trigger_rising_->setCheckable(true);
        connect(trigger_rising_, SIGNAL(triggered()), this, SLOT(on_trigger()));
 
-       trigger_high_ = new QAction(QIcon(":/icons/trigger-high.svg"),
+       trigger_high_ = new QAction(*get_icon(":/icons/trigger-high.svg"),
                tr("Trigger on high level"), parent);
        trigger_high_->setCheckable(true);
        connect(trigger_high_, SIGNAL(triggered()), this, SLOT(on_trigger()));
 
-       trigger_falling_ = new QAction(QIcon(":/icons/trigger-falling.svg"),
+       trigger_falling_ = new QAction(*get_icon(":/icons/trigger-falling.svg"),
                tr("Trigger on falling edge"), parent);
        trigger_falling_->setCheckable(true);
        connect(trigger_falling_, SIGNAL(triggered()), this, SLOT(on_trigger()));
 
-       trigger_low_ = new QAction(QIcon(":/icons/trigger-low.svg"),
+       trigger_low_ = new QAction(*get_icon(":/icons/trigger-low.svg"),
                tr("Trigger on low level"), parent);
        trigger_low_->setCheckable(true);
        connect(trigger_low_, SIGNAL(triggered()), this, SLOT(on_trigger()));
 
-       trigger_change_ = new QAction(QIcon(":/icons/trigger-change.svg"),
+       trigger_change_ = new QAction(*get_icon(":/icons/trigger-change.svg"),
                tr("Trigger on rising or falling edge"), parent);
        trigger_change_->setCheckable(true);
        connect(trigger_change_, SIGNAL(triggered()), this, SLOT(on_trigger()));
 }
 
-QAction* LogicSignal::match_action(const TriggerMatchType *type)
+const vector<int32_t> LogicSignal::get_trigger_types() const
+{
+       try {
+               const Glib::VariantContainerBase gvar =
+                       device_->config_list(ConfigKey::TRIGGER_MATCH);
+               return Glib::VariantBase::cast_dynamic<
+                       Glib::Variant<vector<int32_t>>>(gvar).get();
+       } catch (Error e) {
+               return vector<int32_t>();
+       }
+}
+
+QAction* LogicSignal::action_from_trigger_type(const TriggerMatchType *type)
 {
        QAction *action;
 
@@ -302,7 +314,7 @@ QAction* LogicSignal::match_action(const TriggerMatchType *type)
        return action;
 }
 
-const TriggerMatchType *LogicSignal::action_match(QAction *action)
+const TriggerMatchType *LogicSignal::trigger_type_from_action(QAction *action)
 {
        if (action == trigger_low_)
                return TriggerMatchType::ZERO;
@@ -320,28 +332,20 @@ const TriggerMatchType *LogicSignal::action_match(QAction *action)
 
 void LogicSignal::populate_popup_form(QWidget *parent, QFormLayout *form)
 {
-       Glib::VariantContainerBase gvar;
-       vector<int32_t> trig_types;
-
        Signal::populate_popup_form(parent, form);
 
-       try {
-               gvar = device_->config_list(ConfigKey::TRIGGER_MATCH);
-       } catch (Error e) {
-               return;
-       }
-
        trigger_bar_ = new QToolBar(parent);
        init_trigger_actions(trigger_bar_);
        trigger_bar_->addAction(trigger_none_);
        trigger_none_->setChecked(!trigger_match_);
-       trig_types =
-               Glib::VariantBase::cast_dynamic<Glib::Variant<vector<int32_t>>>(
-                       gvar).get();
+
+       const vector<int32_t> trig_types = get_trigger_types();
        for (auto type_id : trig_types) {
-               auto type = TriggerMatchType::get(type_id);
-               trigger_bar_->addAction(match_action(type));
-               match_action(type)->setChecked(trigger_match_ == type);
+               const TriggerMatchType *const type =
+                       TriggerMatchType::get(type_id);
+               QAction *const action = action_from_trigger_type(type);
+               trigger_bar_->addAction(action);
+               action->setChecked(trigger_match_ == type);
        }
        form->addRow(tr("Trigger"), trigger_bar_);
 
@@ -376,15 +380,26 @@ void LogicSignal::modify_trigger()
                new_trigger->stages().empty() ? nullptr : new_trigger);
 }
 
+const QIcon* LogicSignal::get_icon(const char *path)
+{
+       const QIcon *icon = icon_cache_.take(path);
+       if (!icon) {
+               icon = new QIcon(path);
+               icon_cache_.insert(path, icon);
+       }
+
+       return icon;
+}
+
 void LogicSignal::on_trigger()
 {
        QAction *action;
 
-       match_action(trigger_match_)->setChecked(false);
+       action_from_trigger_type(trigger_match_)->setChecked(false);
 
        action = (QAction *)sender();
        action->setChecked(true);
-       trigger_match_ = action_match(action);
+       trigger_match_ = trigger_type_from_action(action);
 
        modify_trigger();
 }