Allow triggering buttons in boxes from code.

ui/abstract_button.h

@@ -51,6 +51,8 @@ public:
 			lifetime());
 	}
 
+	void clicked(Qt::KeyboardModifiers modifiers, Qt::MouseButton button);
+
 protected:
 	void enterEventHook(QEvent *e) override;
 	void leaveEventHook(QEvent *e) override;
@@ -82,8 +84,6 @@ protected:
 	virtual void onStateChanged(State was, StateChangeSource source) {
 	}
 
-	void clicked(Qt::KeyboardModifiers modifiers, Qt::MouseButton button);
-
 private:
 	void updateCursor();
 	void checkIfOver(QPoint localPos);

ui/layers/box_content.h

@@ -73,6 +73,7 @@ public:
 	virtual void setNoContentMargin(bool noContentMargin) = 0;
 	virtual bool isBoxShown() const = 0;
 	virtual void closeBox() = 0;
+	virtual void triggerButton(int index) = 0;
 
 	template <typename BoxType>
 	QPointer<BoxType> show(
@@ -102,6 +103,9 @@ public:
 	void closeBox() {
 		getDelegate()->closeBox();
 	}
+	void triggerButton(int index) {
+		getDelegate()->triggerButton(index);
+	}
 
 	void setTitle(rpl::producer<QString> title);
 	void setTitle(rpl::producer<TextWithEntities> title) {
@@ -158,7 +162,7 @@ public:
 		setFocus();
 	}
 
-	rpl::producer<> boxClosing() const {
+	[[nodiscard]] rpl::producer<> boxClosing() const {
 		return _boxClosingStream.events();
 	}
 	void notifyBoxClosing() {
@@ -171,7 +175,7 @@ public:
 		prepare();
 		finishPrepare();
 	}
-	not_null<BoxContentDelegate*> getDelegate() const {
+	[[nodiscard]] not_null<BoxContentDelegate*> getDelegate() const {
 		return _delegate;
 	}
 

ui/layers/box_layer_widget.cpp

@@ -156,6 +156,12 @@ void BoxLayerWidget::setAdditionalTitle(rpl::producer<QString> additional) {
 	_additionalTitle = std::move(additional);
 }
 
+void BoxLayerWidget::triggerButton(int index) {
+	if (index < _buttons.size()) {
+		_buttons[index]->clicked(Qt::KeyboardModifiers(), Qt::LeftButton);
+	}
+}
+
 void BoxLayerWidget::setCloseByOutsideClick(bool close) {
 	_closeByOutsideClick = close;
 }

ui/layers/box_layer_widget.h

@@ -84,6 +84,7 @@ public:
 	void closeBox() override {
 		closeLayer();
 	}
+	void triggerButton(int index) override;
 
 	void setCloseByOutsideClick(bool close) override;
 	bool closeByOutsideClick() const override;

ui/layers/generic_box.h

@@ -72,6 +72,8 @@ public:
 	void setInnerFocus() override {
 		if (_focus) {
 			_focus();
+		} else {
+			BoxContent::setInnerFocus();
 		}
 	}