94 lines
2.2 KiB
C++
94 lines
2.2 KiB
C++
#include "VListView.h"
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namespace ezui {
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void VListView::Init()
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{
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this->GetScrollBar()->SetHeight(Height());//滚动条宽度
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this->GetScrollBar()->Parent = this;
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this->GetScrollBar()->OffsetCallback = [this](int offsetValue)->void {
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if (this->GetScrollBar()->ScrollPos() >= 1) {
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NextPage();
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}
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this->Offset(offsetValue);
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};
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}
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VListView::VListView(Object* parentObject) :PagedListView(parentObject)
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{
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Init();
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}
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VListView::~VListView()
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{
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}
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void VListView::OnLayout() {
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this->Offset(0);
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if (IsAutoHeight()) {
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this->GetScrollBar()->SetVisible(false);
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}
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else if (this->GetScrollBar()->IsVisible() == true) {
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this->GetScrollBar()->SetVisible(true);
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}
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this->GetScrollBar()->RefreshScroll();
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this->EndLayout();
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}
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ScrollBar* VListView::GetScrollBar()
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{
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return &m_vScrollBar;
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}
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void VListView::Offset(int offset)
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{
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int contentWidth = 0;
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int _maxBottom = offset;
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for (auto& it : GetControls()) {
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if (it->IsVisible() == false) {
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it->SetY(0);
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continue;
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}
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{
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//处理margin和x坐标
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int width = it->GetFixedWidth();
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if (width == 0) {
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width = this->Width() - it->Margin.GetHSpace();
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}
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int x = it->X();
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if (x == 0) {
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x = it->Margin.Left;
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}
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if (x == 0 && width < this->Width()) {
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x = int((this->Width() * 1.0 - width) / 2 + 0.5);
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}
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_maxBottom += it->Margin.Top;
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it->SetRect(Rect{ x,_maxBottom,width,it->Height() });
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_maxBottom += it->Height();
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_maxBottom += it->Margin.Bottom;
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}
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//计算最大宽度
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int _width = it->X() + it->Width() + it->Margin.Right;
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if (_width > contentWidth) {
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contentWidth = _width;
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}
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}
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this->SetContentSize({ contentWidth, _maxBottom - offset });
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}
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void VListView::OnChildPaint(PaintEventArgs& args) {
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ViewControls.clear();
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//绘制子控件
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auto rect = Rect(0, 0, Width(), Height());
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for (auto& it : GetControls()) {
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if (rect.IntersectsWith(it->GetRect())) {
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ViewControls.push_back(it);
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}
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if (it->Y() >= Height()) {
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break;
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////当控件超出容器底部将不再派发绘制事件 但是仍然要进行布局
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//if (it->IsAutoHeight() && it->GetLayoutState() == LayoutState::Pend) {
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// it->RefreshLayout();
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//}
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}
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else {
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it->SendEvent(args);
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}
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}
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}
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}; |