Added HorizontalContainer for buttons to PhotoEditorControls.

Telegram/SourceFiles/editor/photo_editor_controls.cpp

@@ -7,11 +7,51 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 */
 #include "editor/photo_editor_controls.h"
 
+#include "ui/cached_round_corners.h"
 namespace Editor {
 
-PhotoEditorControls::PhotoEditorControls(
-	not_null<Ui::RpWidget*> parent)
+class HorizontalContainer final : public Ui::RpWidget {
+public:
+	HorizontalContainer(not_null<Ui::RpWidget*> parent);
+
+	void updateChildrenPosition();
+
+};
+
+HorizontalContainer::HorizontalContainer(not_null<Ui::RpWidget*> parent)
 : RpWidget(parent) {
 }
 
+void HorizontalContainer::updateChildrenPosition() {
+	auto left = 0;
+	auto height = 0;
+	for (auto child : RpWidget::children()) {
+		if (child->isWidgetType()) {
+			const auto widget = static_cast<QWidget*>(child);
+			widget->move(left, 0);
+			left += widget->width();
+			height = std::max(height, widget->height());
+		}
+	}
+	resize(left, height);
+}
+
+PhotoEditorControls::PhotoEditorControls(
+	not_null<Ui::RpWidget*> parent,
+	bool doneControls)
+: RpWidget(parent)
+, _buttonsContainer(base::make_unique_q<HorizontalContainer>(this)) {
+
+	_buttonsContainer->updateChildrenPosition();
+
+	sizeValue(
+	) | rpl::start_with_next([=](const QSize &size) {
+
+		_buttonsContainer->moveToLeft(
+			(size.width() - _buttonsContainer->width()) / 2,
+			0);
+
+	}, lifetime());
+
+}
 } // namespace Editor

Telegram/SourceFiles/editor/photo_editor_controls.h

@@ -11,12 +11,18 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 
 namespace Editor {
 
+class HorizontalContainer;
+
 class PhotoEditorControls final : public Ui::RpWidget {
 public:
-	PhotoEditorControls(not_null<Ui::RpWidget*> parent);
+	PhotoEditorControls(
+		not_null<Ui::RpWidget*> parent,
+		bool doneControls = true);
 
 private:
 
+	const base::unique_qptr<HorizontalContainer> _buttonsContainer;
+
 };
 
 } // namespace Editor