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