Replace Old Widgets

Widgets/private/widgets/ScrollableWidget.cpp

@@ -0,0 +1,87 @@
+#include "ScrollableWidget.hpp"
+
+using namespace tp;
+
+void ScrollableBarWidget::process(const EventHandler& events) {
+	// all content is visible no need to process anything
+	if (mSizeFactor >= 1) {
+		mScrolling = false;
+		mPosFactor = mSizeFactor / 2.f;
+		freeFocus();
+		return;
+	}
+
+	updateHandleRect();
+
+	auto pointer = events.getPointer();
+	auto size = getArea().size;
+
+	mHandleHovered = getHandleRect().isInside(pointer);
+
+	if (getRelativeAreaT().isInside(pointer) && events.isPressed(InputID::MOUSE1)) {
+		if (!mHandleHovered) {
+			jumpTo((pointer / size)[mVertical]);
+			mStartPos = { 0, 0 };
+		} else {
+			mStartPos = pointer - getHandleRect().center();
+		}
+		mScrolling = true;
+		lockFocus();
+	}
+
+	if (mScrolling && events.isReleased(InputID::MOUSE1)) {
+		mScrolling = false;
+		freeFocus();
+	}
+
+	if (mScrolling) {
+		updateHandleRect();
+		auto dragDelta = (pointer - getHandleRect().center()) - mStartPos;
+		moveBy((dragDelta / size)[mVertical]);
+	}
+}
+
+void ScrollableBarWidget::jumpTo(halnf pos) {
+	mPosFactor = pos;
+	clamp();
+}
+
+void ScrollableBarWidget::moveBy(halnf delta) {
+	mPosFactor += delta;
+	clamp();
+}
+
+void ScrollableBarWidget::updateSizeFactor(halnf factor) {
+	mSizeFactor = factor;
+	clamp();
+}
+
+void ScrollableBarWidget::clamp() {
+	mSizeFactor = ::clamp(mSizeFactor, 0.f, 1.f);
+	mPosFactor = ::clamp(mPosFactor, mSizeFactor / 2, 1.f - mSizeFactor / 2);
+}
+
+void ScrollableBarWidget::draw(Canvas& canvas) {
+	updateHandleRect();
+
+	canvas.rect(getArea().relative(), mBGColor, mRounding);
+
+	auto& handleColor = mScrolling ? mHandleSlideColor : (mHandleHovered ? mHandleHoverColor : mHandleColor);
+	canvas.rect(getHandleRect(), handleColor, mRounding);
+}
+
+void ScrollableBarWidget::updateHandleRect() {
+	auto area = getArea().relative();
+
+	mHandleRect = area;
+	mHandleRect.size[mVertical] = area.size[mVertical] * mSizeFactor;
+	mHandleRect.pos[mVertical] = area.size[mVertical] * mPosFactor;
+
+	mHandleRect.pos[mVertical] -= mHandleRect.size[mVertical] / 2;
+
+	mHandleRect.shrinkFromCenter(mHandlePadding, true);
+}
+
+const RectF& ScrollableBarWidget::getHandleRect() const {
+	return mHandleRect;
+}