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Extract Viewer::(vertical|horizontal)ScrollStep()

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This commit is contained in:
Igor Kushnir 2021-03-06 18:39:01 +02:00
parent 133b547e7a
commit feaee915bc
2 changed files with 25 additions and 10 deletions
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32
YACReader/viewer.cpp
View File

@ -492,6 +492,18 @@ void Viewer::scrollBackwardVerticalFirst()
}
}
static constexpr auto relativeScrollStep = 0.80;
int Viewer::verticalScrollStep() const
{
return static_cast<int>(height() * relativeScrollStep);
}
int Viewer::horizontalScrollStep() const
{
return static_cast<int>(width() * relativeScrollStep);
}
bool Viewer::isEdge(scrollDirection d)
{
if (d == UP)
@ -509,15 +521,15 @@ void Viewer::scrollZigzag(scrollDirection d1, scrollDirection d2, bool forward)
if (!isEdge(d1)) {
if (d1 == UP)
scrollTo(horizontalScrollBar()->sliderPosition(),
verticalScrollBar()->sliderPosition() - static_cast<int>((height() * 0.80)));
verticalScrollBar()->sliderPosition() - verticalScrollStep());
else if (d1 == DOWN)
scrollTo(horizontalScrollBar()->sliderPosition(),
verticalScrollBar()->sliderPosition() + static_cast<int>((height() * 0.80)));
verticalScrollBar()->sliderPosition() + verticalScrollStep());
else if (d1 == LEFT)
scrollTo(horizontalScrollBar()->sliderPosition() - static_cast<int>((width() * 0.80)),
scrollTo(horizontalScrollBar()->sliderPosition() - horizontalScrollStep(),
verticalScrollBar()->sliderPosition());
else // d1 == RIGHT
scrollTo(horizontalScrollBar()->sliderPosition() + static_cast<int>((width() * 0.80)),
scrollTo(horizontalScrollBar()->sliderPosition() + horizontalScrollStep(),
verticalScrollBar()->sliderPosition());
} else if (!isEdge(d2)) {
int x = 0;
@ -533,13 +545,13 @@ void Viewer::scrollZigzag(scrollDirection d1, scrollDirection d2, bool forward)
x = horizontalScrollBar()->minimum();
if (d2 == UP)
y = std::max(verticalScrollBar()->sliderPosition() - static_cast<int>((height() * 0.80)), verticalScrollBar()->minimum());
y = std::max(verticalScrollBar()->sliderPosition() - verticalScrollStep(), verticalScrollBar()->minimum());
else if (d2 == DOWN)
y = std::min(verticalScrollBar()->sliderPosition() + static_cast<int>((height() * 0.80)), verticalScrollBar()->maximum());
y = std::min(verticalScrollBar()->sliderPosition() + verticalScrollStep(), verticalScrollBar()->maximum());
else if (d2 == LEFT)
x = std::max(horizontalScrollBar()->sliderPosition() - static_cast<int>((width() * 0.80)), horizontalScrollBar()->minimum());
x = std::max(horizontalScrollBar()->sliderPosition() - horizontalScrollStep(), horizontalScrollBar()->minimum());
else // d2 == RIGHT
x = std::min(horizontalScrollBar()->sliderPosition() + static_cast<int>((width() * 0.80)), horizontalScrollBar()->maximum());
x = std::min(horizontalScrollBar()->sliderPosition() + horizontalScrollStep(), horizontalScrollBar()->maximum());
scrollTo(x, y);
} else {
@ -596,12 +608,12 @@ void Viewer::keyPressEvent(QKeyEvent *event)
else*/
if (key == ShortcutsManager::getShortcutsManager().getShortcut(AUTO_SCROLL_FORWARD_ACTION_Y)) {
nextPos = verticalScrollBar()->sliderPosition() + static_cast<int>((height() * 0.80));
nextPos = verticalScrollBar()->sliderPosition() + verticalScrollStep();
scrollDown();
}
else if (key == ShortcutsManager::getShortcutsManager().getShortcut(AUTO_SCROLL_BACKWARD_ACTION_Y)) {
nextPos = verticalScrollBar()->sliderPosition() - static_cast<int>((height() * 0.80));
nextPos = verticalScrollBar()->sliderPosition() - verticalScrollStep();
scrollUp();
}

3
YACReader/viewer.h
View File

@ -164,6 +164,9 @@ private:
void moveAction(const QKeySequence &key);
int verticalScrollStep() const;
int horizontalScrollStep() const;
//! ZigzagScroll
enum scrollDirection { UP,
DOWN,