初版-带一个进度条

sources/Animation.cpp

@@ -0,0 +1,65 @@
+#include "Animation.h"
+namespace ezui {
+
+	Animation::Animation(Object* parentObject)
+		: Object(parentObject)
+	{
+		m_timer = new Timer(this);
+		m_timer->Tick = [this](Timer* t) {
+			auto now = std::chrono::steady_clock::now();
+			auto delta = std::chrono::duration_cast<std::chrono::milliseconds>(std::chrono::steady_clock::now() - m_lastTime).count();
+			m_lastTime = now;
+
+			m_currValue += m_speedPerMs * delta;
+
+			bool finished = false;
+			if ((m_speedPerMs > 0 && m_currValue >= m_endValue) || (m_speedPerMs < 0 && m_currValue <= m_endValue)) {
+				m_currValue = m_endValue;
+				finished = true;
+			}
+
+			if (ValueChanged) {
+				ValueChanged(m_currValue);
+			}
+
+			if (finished) {
+				t->Stop();
+			}
+			};
+	}
+
+	Animation::~Animation()
+	{
+		m_timer->Stop();
+	}
+
+	void Animation::SetStartValue(float value)
+	{
+		m_startValue = value;
+	}
+
+	void Animation::SetEndValue(float value)
+	{
+		m_endValue = value;
+	}
+
+	void Animation::Start(int durationMs, int fps)
+	{
+		m_timer->Stop();
+
+		m_currValue = m_startValue;
+		float distance = m_endValue - m_startValue;
+		m_speedPerMs = distance / durationMs;
+
+		m_lastTime = std::chrono::steady_clock::now(); //记录开始时间
+		m_timer->Interval = 1000 / fps; //频率
+		m_timer->Start();
+	}
+	bool Animation::IsStopped() {
+		return m_timer->IsStopped();
+	}
+	void Animation::Stop()
+	{
+		m_timer->Stop();
+	}
+}