151 lines
3.1 KiB
C++
151 lines
3.1 KiB
C++
#include "trackviewsplitter.h"
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#include <QDebug>
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#include <QPainter>
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TrackViewSplitter::TrackViewSplitter(Qt::Alignment vertical_alignment, QWidget* parent) :
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QSplitter(Qt::Vertical, parent),
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alignment_(vertical_alignment)
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{
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setHandleWidth(1);
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int initial_height = 0;
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// Add empty spacer so we get a splitter handle after the last element
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addWidget(new QWidget());
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setFixedHeight(initial_height);
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}
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void TrackViewSplitter::HandleReceiver(TrackViewSplitterHandle *h, int diff)
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{
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int ele_id = -1;
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for (int i=0;i<count();i++) {
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if (handle(i) == h) {
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ele_id = i;
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break;
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}
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}
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// The handle index is actually always one above the element index
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if (alignment_ == Qt::AlignTop) {
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ele_id--;
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} else if (alignment_ == Qt::AlignBottom) {
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diff = -diff;
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}
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QList<int> element_sizes = sizes();
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int old_ele_sz = element_sizes.at(ele_id);
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// Transform element size by diff
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int new_ele_sz = old_ele_sz + diff;
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// Validate it with the widget's minimum size
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new_ele_sz = qMax(new_ele_sz, widget(ele_id)->minimumHeight());
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// Correct diff
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diff = new_ele_sz - old_ele_sz;
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SetTrackHeight(ele_id, new_ele_sz);
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if (alignment_ == Qt::AlignBottom) {
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ele_id = count() - ele_id - 1;
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}
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emit TrackHeightChanged(ele_id, new_ele_sz);
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}
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void TrackViewSplitter::SetTrackHeight(int index, int h)
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{
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QList<int> element_sizes = sizes();
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int old_ele_sz = element_sizes.at(index);
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int diff = h - old_ele_sz;
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// Set new size on element
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element_sizes.replace(index, h);
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setSizes(element_sizes);
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// Increase height by the difference
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setFixedHeight(height() + diff);
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}
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void TrackViewSplitter::SetHeightWithSizes(const QList<int> &sizes)
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{
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int start_height = 0;
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foreach (int s, sizes) {
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start_height += s + handleWidth();
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}
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setFixedHeight(start_height);
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setSizes(sizes);
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}
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void TrackViewSplitter::Insert(int index, int height, QWidget *item)
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{
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QList<int> sz = sizes();
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if (alignment_ == Qt::AlignBottom) {
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index = count() - index;
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}
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sz.insert(index, height);
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insertWidget(index, item);
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SetHeightWithSizes(sz);
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}
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void TrackViewSplitter::Remove(int index)
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{
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QList<int> sz = sizes();
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if (alignment_ == Qt::AlignBottom) {
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index = count() - index;
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}
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sz.removeAt(index);
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delete widget(index);
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SetHeightWithSizes(sz);
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}
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QSplitterHandle *TrackViewSplitter::createHandle()
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{
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return new TrackViewSplitterHandle(orientation(), this);
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}
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TrackViewSplitterHandle::TrackViewSplitterHandle(Qt::Orientation orientation, QSplitter *parent) :
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QSplitterHandle(orientation, parent),
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dragging_(false)
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{
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}
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void TrackViewSplitterHandle::mousePressEvent(QMouseEvent *)
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{
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}
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void TrackViewSplitterHandle::mouseMoveEvent(QMouseEvent *)
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{
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if (dragging_) {
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static_cast<TrackViewSplitter*>(parent())->HandleReceiver(this, QCursor::pos().y() - drag_y_);
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}
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drag_y_ = QCursor::pos().y();
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dragging_ = true;
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}
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void TrackViewSplitterHandle::mouseReleaseEvent(QMouseEvent *)
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{
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dragging_ = false;
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}
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void TrackViewSplitterHandle::paintEvent(QPaintEvent *)
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{
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QPainter p(this);
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p.fillRect(rect(), palette().base());
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}
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