1 files changed, 49 insertions, 0 deletions
diff --git a/src/ui/style/Trigger.cpp b/src/ui/style/Trigger.cpp
new file mode 100644
index 00000000..b7292ce3
--- /dev/null
+++ b/src/ui/style/Trigger.cpp
@@ -0,0 +1,49 @@
+#include "cru/ui/style/Trigger.hpp"
+
+#include "cru/ui/controls/Control.hpp"
+#include "cru/ui/helper/ClickDetector.hpp"
+
+namespace cru::ui::style {
+void Trigger::Raise(bool value) {
+  if (value == current_) return;
+  current_ = value;
+  change_event_.Raise(value);
+}
+
+CompoundTrigger::CompoundTrigger(std::vector<Trigger*> triggers)
+    : triggers_(std::move(triggers)) {
+  for (auto trigger : triggers_) {
+    guard_ += trigger->ChangeEvent()->AddHandler(
+        [this](bool) { Raise(this->CalculateState(triggers_)); });
+  }
+}
+
+bool AndTrigger::CalculateState(const std::vector<Trigger*>& triggers) const {
+  for (auto trigger : triggers) {
+    if (!trigger->GetState()) return false;
+  }
+  return true;
+}
+
+bool OrTrigger::CalculateState(const std::vector<Trigger*>& triggers) const {
+  for (auto trigger : triggers) {
+    if (trigger->GetState()) return true;
+  }
+  return false;
+}
+
+FocusTrigger::FocusTrigger(controls::Control* control, bool has_focus)
+    : has_focus_(has_focus) {
+  guard_ += control->GainFocusEvent()->Direct()->AddHandler(
+      [this](auto) { Raise(has_focus_); });
+  guard_ += control->LoseFocusEvent()->Direct()->AddHandler(
+      [this](auto) { Raise(!has_focus_); });
+}
+
+ClickStateTrigger::ClickStateTrigger(controls::IClickableControl* control,
+                                     helper::ClickState click_state)
+    : click_state_(click_state) {
+  guard_ += control->ClickStateChangeEvent()->AddHandler(
+      [this](helper::ClickState cs) { Raise(cs == click_state_); });
+}
+}  // namespace cru::ui::style