初版-带一个进度条

sources/HScrollBar.cpp

@@ -0,0 +1,70 @@
+#include "HScrollBar.h"
+
+namespace ezui {
+	HScrollBar::HScrollBar(Object* parentObj):ScrollBar(parentObj)
+	{
+	}
+	HScrollBar::~HScrollBar() {}
+	Rect HScrollBar::GetSliderRect() {
+		Rect sliderRect;
+		sliderRect.X = (int)m_sliderPos;
+		sliderRect.Y = 0;
+		sliderRect.Width = m_sliderLength;
+		sliderRect.Height = Height();
+		if (this->Scrollable() && sliderRect.Width <= 0) {
+			sliderRect.Width = 1;
+		}
+		return sliderRect;
+	}
+	void HScrollBar::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.X >= 0 && ctlRect.GetRight() <= Width()) {
+				return;
+			}
+			//出现在顶部
+			int offset = this->m_offset - ctlRect.X;
+			if (ctlRect.Y > 0) {
+				//出现在底部
+				offset += this->m_viewLength - ctlRect.Width;
+			}
+			__super::ScrollTo(offset, Event::None);
+		}
+	}
+	void HScrollBar::GetInfo(int* viewLength, int* contentLength, int* scrollBarLength)
+	{
+		*viewLength = this->Parent->Width();
+		*contentLength = this->Parent->GetContentSize().Width;
+		*scrollBarLength = Width();
+	}
+	void HScrollBar::ParentSize(const Size& size) {
+		this->SetRect({ 0,size.Height - this->Height(),size.Width,Height() });
+	}
+	void HScrollBar::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.X;
+		}
+	}
+	void HScrollBar::OnMouseMove(const MouseEventArgs& arg)
+	{
+		__super::OnMouseMove(arg);
+		auto point = arg.Location;
+		if (m_mouseDown) {
+			int offsetX = point.X - this->m_lastPoint;
+			m_sliderPos += offsetX;
+			m_lastPoint = point.X;
+			int offset = m_sliderPos * this->m_rollRate + 0.5;
+			__super::ScrollTo(-offset, Event::OnMouseDrag);
+		}
+	}
+};