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The Old New Thing
The Old New Thing
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    The Old New Thing

    July 2003 - The Old New Thing

    Scrollbars, part 4: Adding a proportional scrollbar
    Scrollbars, part 4: Adding a proportional scrollbar
    July 31, 2003 Jul 31, 2003 07/31/03
    Raymond Chen
    To obtain a proportional scrollbar, you need to tell Windows the minimum and maximum values covered by the scrollbar, the current scrollbar position, and the size of the scrollbar thumb (called the "page size"). One annoyance of the way scrollbars are set up is that the maximum value is attainable. This ...

    Comments are closed.0Code
    Answer to yesterday's exercise
    Answer to yesterday's exercise
    July 30, 2003 Jul 30, 2003 07/30/03
    Raymond Chen
    iMin is the lowest-index element which intersects the paint rectangle, so a simple truncating division produces the desired index. The formula for iMax can be interpreted two ways. One is that it is the roundup of the first invisible line. Recall the rectangles are exclusive of the endpoint...

    Comments are closed.0Code
    Why doesn't the new Start menu use Intellimenus in the All Programs list?
    Why doesn't the new Start menu use Intellimenus in the All Programs list?
    July 30, 2003 Jul 30, 2003 07/30/03
    Raymond Chen
    Common request: I want to be able to turn on personalized menus (Intellimenus) when in XP Start Menu mode. Imagine if Intellimenus were enabled with the XP Start Menu. You use 5 apps; the rest are not used much. (Studies show that 5 is the typical number of unique ...

    Comments are closed.0History
    Scrollbars, part 3: Optimizing the paint cycle
    Scrollbars, part 3: Optimizing the paint cycle
    July 29, 2003 Jul 29, 2003 07/29/03
    Raymond Chen
    Observe that we paint all 100 lines in our paint handler, even though most of them aren't visible. This is a problem if there are a large number of items, or if painting an item is time-consuming. So instead, we optimize our paint cycle so as to paint only the elements which intersect the...

    Comments are closed.0Code
    Why doesn't Windows have an "expert mode"?
    Why doesn't Windows have an "expert mode"?
    July 28, 2003 Jul 28, 2003 07/28/03
    Raymond Chen
    We often get requests like this: There should be a slider bar somewhere, say on the Performance Tab, that ranges from Novice to Advanced. At the highest level, all the geek settings are turned on. At the Novice level, all the settings for beginners are turned on. In between, we can gradually enable stuff...

    Comments are closed.0History
    Scrollbars, part 2
    Scrollbars, part 2
    July 25, 2003 Jul 25, 2003 07/25/03
    Raymond Chen
    Managing scrollbars is not hard in principle. The basic idea is not that difficult, but there are a lot of small details that need to be ironed out. If you don't get the details just right, your program will feel odd in a strange way that you often can't pinpoint, much like a subtle background hum that ...

    Comments are closed.0Code
    More terse Q&A on Tweak UI 2.10
    More terse Q&A on Tweak UI 2.10
    July 24, 2003 Jul 24, 2003 07/24/03
    Raymond Chen
    I'm going to try to alternate between programming entries (where I actually try to teach something) and random entries (where I get to spout off or go into storytelling mode). So here's another random entry. Why does Tweak UI put up a totally incomprehensible error message ("Cannot locate...

    Comments are closed.0Other
    The scratch program
    The scratch program
    July 23, 2003 Jul 23, 2003 07/23/03
    Raymond Chen
    Occasionally, there is need to illustrate a point with a full program. To avoid reproducing the boring parts of the program, let's agree on using the following template for our sample programs. For expository purposes, I won't use a C++ class. I'll just keep all my variables global. In a real program, of course, instance data would be ...

    Comments are closed.0Code
    Why do you have to click the Start button to shut down?
    Why do you have to click the Start button to shut down?
    July 22, 2003 Jul 22, 2003 07/22/03
    Raymond Chen
    Short answer: The same reason you turn the ignition key to shut off your car. Long answer: Back in the early days, the taskbar didn't have a Start button. (In a future history column, you'll learn that back in the early days, the taskbar wasn't called the taskbar.) Instead of ...

    Comments are closed.0History
    Tweak UI 2.10
    Tweak UI 2.10
    July 21, 2003 Jul 21, 2003 07/21/03
    Raymond Chen
    What are you talking about? Tweak UI is part of the Windows XP PowerToys. It was recently updated to version 2.10. What OS is required? Windows XP Service Pack 1 (or higher) or Windows Server 2003 (all versions). Not supported: Windows XP RTM, Windows...

    Comments are closed.0Other
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