初版-带一个进度条

sources/VScrollBar.cpp

@@ -0,0 +1,70 @@
+#include "VScrollBar.h"
+namespace ezui {
+	VScrollBar::VScrollBar(Object* parentObject):ScrollBar(parentObject)
+	{
+	}
+	VScrollBar::~VScrollBar() { }
+	void VScrollBar::ScrollTo(Control* ctl)
+	{
+		if (ctl && ctl->Parent && ctl->Parent == this->Parent) {
+			if (ctl->Parent->IsPendLayout()) {
+				ctl->Parent->RefreshLayout();
+			}
+			//控件的矩形位置
+			const Rect& ctlRect = ctl->GetRect();
+			if (ctlRect.Y >= 0 && ctlRect.GetBottom() <= Height()) {
+				return;
+			}
+			//出现在顶部
+			int offset = this->m_offset - ctlRect.Y;
+			if (ctlRect.Y > 0) {
+				//出现在底部
+				offset += this->m_viewLength - ctlRect.Height;
+			}
+			__super::ScrollTo(offset, Event::None);
+		}
+	}
+
+	Rect VScrollBar::GetSliderRect() {
+		Rect sliderRect;
+		sliderRect.X = 0;
+		sliderRect.Y = m_sliderPos;
+		sliderRect.Width = Width();
+		sliderRect.Height = m_sliderLength;
+		if (this->Scrollable() && sliderRect.Height <= 0) {
+			sliderRect.Height = 1;
+		}
+		return sliderRect;
+	}
+	void VScrollBar::GetInfo(int* viewLength, int* contentLength, int* scrollBarLength)
+	{
+		*viewLength = this->Parent->Height();
+		*contentLength = this->Parent->GetContentSize().Height;
+		*scrollBarLength = Height();
+	}
+	void VScrollBar::ParentSize(const Size& size) {
+		this->SetRect({ size.Width - this->Width() ,0,this->Width(),size.Height });
+	}
+	void VScrollBar::OnMouseDown(const MouseEventArgs& arg) {
+		__super::OnMouseDown(arg);
+		Rect sliderRect = GetSliderRect();
+		if (sliderRect.IsEmptyArea()) { return; }
+		auto point = arg.Location;
+		if (arg.Button == MouseButton::Left && sliderRect.Contains({ point.X,point.Y })) {
+			m_mouseDown = true;
+			this->m_lastPoint = point.Y;
+		}
+	}
+	void VScrollBar::OnMouseMove(const MouseEventArgs& arg)
+	{
+		__super::OnMouseMove(arg);
+		if (m_mouseDown) {
+			auto point = arg.Location;
+			int offsetY = point.Y - this->m_lastPoint;
+			m_sliderPos += offsetY;
+			m_lastPoint = point.Y;
+			int offset = m_sliderPos * this->m_rollRate + 0.5;
+			__super::ScrollTo(-offset, Event::OnMouseDrag);
+		}
+	}
+};