之前写的生命计算器，刚刚更新了一下，实现在 Client Area 点击鼠标拖动窗体（WPF）的问题：
http://hddcn.spaces.live.com/blog/cns!1095F8D4903F1838!712.entry

我的做法，计算窗体左上角相对鼠标的坐标来实现移动——

        Point oldPosition = new Point(0, 0);
        Point newPosition = new Point(0, 0);
        bool mouseDown = false;

        private void Window_MouseDown(object sender, MouseButtonEventArgs e)
        {
            oldPosition = Mouse.GetPosition(this);
            mouseDown = true;
        }

        private void Window_MouseUp(object sender, MouseButtonEventArgs e)
        {
            mouseDown = false;
        }

        private void Window_MouseMove(object sender, MouseEventArgs e)
        {
            if (mouseDown)
            {
                newPosition = Mouse.GetPosition(this);
                this.Left = this.Left + newPosition.X - oldPosition.X;
                this.Top = this.Top + newPosition.Y - oldPosition.Y;
            }
        }

        private void Window_MouseLeave(object sender, MouseEventArgs e)
        {
            mouseDown = false;
        }

最后发现可以——

        private void Window_MouseDown(object sender, MouseButtonEventArgs e)
        {
            this.DragMove();
        }

就是这么简单，.net 3.0已经为WPF提供了Window.DragMove方法，调用就行了。
http://msdn.microsoft.com/zh-cn/library/system.windows.window.dragmove.aspx

我当时在MSDN搜了半天，没找到这个方法，无奈之下才自己想了个算法，但是我们的程序员一下就找到了最简方案。这是一个很小的很浅的问题，但是体现了业余和专业的区别之一：快速获取所需资讯的能力。

人的牛逼程度跟平时付出了多少是成正比的，“不能耍一辈子小聪明啊”。

到3月底大概是学琴1年，拜厄和599搞定，勉强能啃4级的曲子（花费N倍时间的前提下），实际水平达不到，读谱还非常慢。由于时间原因并没有投入太多，但是总算磕磕绊绊地达到了 Fahrenheit Mouse 定下的那本《巴赫初级钢琴曲集》的要求（当然要完全流畅地弹奏还差得远）。

中途因为琴行的原因换了两次老师，教材大致顺序是：钢基1（部分）+大汤1+拜厄 → 大汤2+拜厄+巴赫初级 → 599+718 → 849+？（849还没开始）。

如果有成年人学琴参考，我现在可以说点建议：

关于信心——你要是喜欢钢琴这件乐器，看到钢琴的那种激动就像我看到暴雪公布Diablo III一样，那就开始学吧。你要是想“提高艺术修养”什么的，那我也不知道行不行，我身边学琴的朋友全都是大俗人，而且50%处于失恋+失业状态，还有N个钢琴专业毕业找不到工作的天天泡吧。至于“我已经XX岁了，现在学是不是晚了”这种问题，可以告诉你：没错，是的，已经晚了。但弹琴是熟练工种，跟下棋还不太一样，只要勤练，当作爱好是没问题的。成人经过几年的练习达到6级水平的例子不少，有无数简单、美丽的曲子都在6级水平以下，足够玩的。

老师——关于要不要找老师的问题。据说：当你第一次坐在钢琴前面，把双手放在键盘上，你至少会同时犯10个以上的错误。在PC上播放视频是无法纠正你这些错误的，更别说触键和手指动起来的时候会出现的各类问题。所以一定要找老师，哪怕只上几节课，也可以避免将来花大力气纠正错误。

乐理——最好先自学下乐理，乐理可以让你明白诸如“钢琴键盘为什么是现在这个样子的”、“这个旋律/和弦为什么是这样写的，为什么这个do弹成升do或者xi或者re就不好听了”之类的道理。推荐任达敏主编那本《基本乐理》（好像是挺常见的高校课本）。感觉李重光先生的书写的有点乱（这不是我一个人的看法）。有能力的话最好学完音程、和弦、调式，弄不懂的到网上发帖问，或者问懂乐理的朋友，或者记下来上课时去问老师。尽可能熟悉五线谱，不要使用“从某个音开始向上或者向下数线、间”的方式来确定这个音是什么，而是像背单词那样看到就立刻认出来是什么音，你就当单词来背，一共也没多少音。尽可能熟悉常见的节奏型。钢琴课是没有进度规定的，每节课100元左右，你聪明的话老师就多讲点，否则老师就少讲点。如果你不介意老师占用大量课堂时间给你讲“大三和弦的第一转位是大六和弦，第二转位是大四六和弦，你现在看到的这个是第二转位状态下的一个大三和弦”，那也可以忽略这条建议。

哈农——开始每天都弹，学多了如果没时间可以每2天过一遍，每一遍都是第一条开始弹到你学的最后一条为止。我的老师前20条是按顺序教的，但其实也不一定非要按顺序学，比如三度音连奏（第51条）和保持八度音（第58条）都可以先练习。如果有老师，他一般会引导你改变原谱的节奏来弹。哈农很枯燥，但你只要坚持练半年以上，就会体验到好处。

音阶琶音——从你学会C大调音阶琶音开始，往后每天都要弹各调的音阶琶音。这个绝对不能省略，而且也花不了多少时间。音阶可能不是一开始就学的，最初是先五指原位练习和相应的练习曲，熟了之后才是音阶，从你的第一节钢琴课到第一次双手合奏C大调音阶可能会有1个月（4-8次课）的过程。不必心急。

新曲——可以安排每隔一天都弹新曲。不一定弹完，但至少要往下进行几个乐句，有些曲子难点恰好在乐句之间的衔接，所以衔接也要练习，不能每次都恰好中断在一个乐句处。教材里不是每首都必须弹的，老师一般会在同类选一个让你弹熟练，后续根据你的情况再有针对性的选曲。当然你有异议完全可以提，跟老师商量。

复习——可以安排每次学新曲的第二天进行复习。反复弹N次，自信没有错误了再听录音，最后回课再弹给老师看。

此外——①曲子第一遍一定要自己弹，不要听录音。自己弹的一定会出错，但随后通过听录音和老师指出错误可以让你很深刻地搞明白，你在哪里出错了，为什么会出错，这样进步很快。②不要刻意的背谱，把练习曲谱背下来意义不大，看乐谱弹奏反应不过来的人才喜欢大量背谱，不下苦功夫锻炼这个能力会严重影响后续学习效率。这是我的血泪教训。人人都能背谱的，背谱是低级技能。③致爱丽丝原版至少是5级（或者更高吧）水平，它分为几个段落（也许后面的段落不太常听到），完整的曲子，0起点1-2个月内学会应该是不可能的，贝多芬自己学琴2个月的时候也弹不了这个曲子，所以不要相信那些培训机构拿这个来忽悠你。（如果是简化版的那就无所谓了）。④踏实地苦练，遇到问题先自己练习，然后问老师，然后再练习，别不耐烦。

其他没啥了。

上次提到新版大学英语精读/泛读（第三版），推荐给朋友的弟弟自学用（好吧已经被BS了），前两天带他去书城翻这套书，竟然缺货，跑了深圳几个书城和一家教育书店，都不全，连网上也买不到全套……真强。相比之下，倒是满世界的《新概念英语》，是个书摊都有全套卖。

他先买了预备级和一、二册，回来的车上我翻看，发现预备级有一篇课文叫"Dear Daughter"，竟然是我N久以前在某报纸（或者杂志？）上看过的一封妈妈写给女儿的信，这封信当时还是给我了一点点触动，"Sometimes teenagers don't understand their parents' rules because they haven't lived as long and they don't see the hidden dangers."这句一直记忆犹新。我搜了一下，在lessontutor.com找到原文，作者是Elaine Ernst Schneider，下面转载分享之。文章很简单，我觉得初中程度就能读。课本上删减了一段，一些句子有改动。

Dear Daughter,

Your dad and I aren't husband and wife anymore, but we are still your Mom and Dad. Only we can truly understand the other's grief in losing you. If only you had walked away from that car when you saw that the kids were drinking… Why did you get in their car? Why did you take the chance? Didn't you know that you would break our hearts and forever rob us of the joy of having you in our lives?

As I see you lying there so lifeless, how I wish I could take your place. How I wish I were the one they will soon be laying in the ground. How will your father and I ever learn to live without you? We will miss your vibrant laugh and wonderful sense of humor. I will miss seeing how your eyes sparkle when you are excited about something and want to share it with me. Your dad will miss that familiar page that says "Call me quick! I've got news."

So many dreams and goals that you had. Now these will never be fulfilled because of one empty decision – one poor choice – one moment where you forgot to think before you acted. What might God have made of your life? I wonder what His plans were for you? Now we'll never know. We'll never get to see you grow into adulthood, meet your future husband, or hold out our arms to hold your first baby. It all came to a dead stop the night the car crashed into that cement embankment. I'll never be able to drive by that place again, to see your blood and the blood of your friends splattered against the cold cement, a testimony to teenage rebellion – teenagers who thought they had all the answers and risked their lives to prove it.

How will I ever walk by your room again and see the pretty bedspread and curtains that your dad bought for you? Or will I have to take them down to be packed in a box that I can never open because I simply cannot bear to see the things that remind me of you? How will I explain to your sister how I let it happen? Was there something else I should have done? Something else I should have said? Why wouldn't you listen? And what am I to tell your sister's child when she looks in the family albums and finds that the pictures of her auntie suddenly stop? How do I explain to her that there are no more pictures because there is no more you? 

I know that teenagers think they have all the answers. You didn't want to believe that your dad and I were actually young once and faced many of the same temptations. You didn't want to believe that what we were telling you was the truth – that alcohol and drugs would rob you of your life. You didn't want to believe that you couldn't play around with those things – that even dabbling with them was serious. You didn't want to believe that – yes – just one time could damage you. You didn't want to believe us that we were telling you these things not only because they are the truth, but because we loved you so very much and were so afraid that this very day would come if you didn't change the direction you were headed in. And now that day is here -- the day that came from getting in a car with alcohol just one time. And now you are lying there so still. No more laughter. No more sparkle in your eyes. Just an empty shell where our beautiful baby girl used to live. Throughout life, there are many temptations to do things that might be harmful. Sometimes teenagers don't understand their parents' rules because they haven't lived as long and they don't see the hidden dangers. Wisdom is learning to face those temptations, think about what God and your parents would have you do, and then just say "no." If only you had said no.

Mom and Dad

昨天去书城，看到当年用的课本《大学英语 精读/泛读》系列终于出了新版（旧版好像是十年前的版本）。可能现在教材市场竞争越来越激烈，丫们终于发现不得不更新了。以前我上学时用《大学英语 精读/泛读》的学校很多，不过昨晚打听了几个学校，几年前就分别都选了不同的教材，还有一套《新视野大学英语》和一套《21世纪XXX英语》也N多学校在用……

这次的“第三版”排版印刷比老版本漂亮多了，老掉牙的课文也都换掉了，真不爽自己生那么早- -

另外新版除了精读和泛读的6册，竟然还有一本“预备级”，只要1300词汇量就可以开始学。估计是同时照顾到面向社会的教育市场。

竞争激烈啊～

大概翻了一下，不少课文还挺幽默。放张“预备级”的例子——