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Added ability to snap rotation of items with Shift key in photo editor.

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This commit is contained in:
23rd 2021-03-10 12:55:02 +03:00
parent 0b5044f064
commit 184d984336
1 changed files with 18 additions and 11 deletions
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29
Telegram/SourceFiles/editor/scene_item_base.cpp
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@ -16,6 +16,8 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
namespace Editor {
namespace {
constexpr auto kSnapAngle = 45.;
auto Normalized(float64 angle) {
return angle
+ ((std::abs(angle) < 360) ? 0 : (-360 * (angle < 0 ? -1 : 1)));
@ -107,17 +109,20 @@ void ItemBase::paint(
void ItemBase::mouseMoveEvent(QGraphicsSceneMouseEvent *event) {
if (isHandling()) {
const auto mousePos = event->pos();
const auto shift = event->modifiers().testFlag(Qt::ShiftModifier);
const auto isLeft = (_handle == HandleType::Left);
// Resize.
const auto p = isLeft ? (mousePos * -1) : mousePos;
const auto dx = int(2.0 * p.x());
const auto dy = int(2.0 * p.y());
prepareGeometryChange();
_horizontalSize = std::clamp(
(dx > dy ? dx : dy),
st::photoEditorItemMinSize,
st::photoEditorItemMaxSize);
updateVerticalSize();
if (!shift) {
// Resize.
const auto p = isLeft ? (mousePos * -1) : mousePos;
const auto dx = int(2.0 * p.x());
const auto dy = int(2.0 * p.y());
prepareGeometryChange();
_horizontalSize = std::clamp(
(dx > dy ? dx : dy),
st::photoEditorItemMinSize,
st::photoEditorItemMaxSize);
updateVerticalSize();
}
// Rotate.
const auto origin = mapToScene(boundingRect().center());
@ -126,7 +131,9 @@ void ItemBase::mouseMoveEvent(QGraphicsSceneMouseEvent *event) {
const auto diff = pos - origin;
const auto angle = Normalized((isLeft ? 180 : 0)
+ (std::atan2(diff.y(), diff.x()) * 180 / M_PI));
setRotation(angle);
setRotation(shift
? (std::round(angle / kSnapAngle) * kSnapAngle) // Snap rotation.
: angle);
} else {
QGraphicsItem::mouseMoveEvent(event);
}