设置边界限制平移/拖动缩放的自定义相对布局 [英] Setting boundary limits for panning/dragging a Zoomable custom relative layout
问题描述
我已经与以下链接的帮助下实现的缩放和平移/拖动功能在我的自定义相对布局成功。
I've implemented zoom and pan/drag functionality in my custom relative layout successfully with the help of following links.
1）。一个优秀的教程 - 使得检测-的，多点触控
1). An excellent tutorial - making-sense-of-multitouch
2）。 （SO链接）<一个href=\"http://stackoverflow.com/questions/6378904/extending-relativelayout-and-overriding-dispatchdraw-to-create-a-zoomable-vie/6511296#6511296\">Extending RelativeLayout的，并覆盖dispatchDraw（）来创建一个可缩放的ViewGroup
2). (SO link) Extending RelativeLayout, and overriding dispatchDraw() to create a zoomable ViewGroup
3）。 （SO链接）<一个href=\"http://stackoverflow.com/questions/10257321/scroll-panning-or-drag-in-custom-layout\">Scroll/Panning或自定义布局拖
3). (SO link) Scroll/Panning or drag in custom layout
下面是我的完整的工作code。
Here's my full working code.
https://gist.github.com/pandeyGitHub/6805840 。
和我layout.xml如下： -
and my layout.xml looks like this:-
<com.myzoomproject.views.ZoomableRelativeLayout
android:id="@+id/root_pager"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<com.myzoomproject.views.CustomViewPager
android:id="@+id/pager_test2"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</com.myzoomproject.views.ZoomableRelativeLayout>
我的自定义相对布局包含viewpager在我viewpager每一单页包含2-4 imageviews（一个全屏的ImageView和放大器;一对夫妇的点击小imageviews的）。缩放和放大器;平移网页作品就好。
My Custom relative layout contains a viewpager and each single page in my viewpager contains 2-4 imageviews (one fullscreen imageview & a couple of clickable smaller imageviews). Zooming & panning the page works just fine.
问题1：
但不知何故，我无法将边界限制作为平移功能。该页面将关闭平移上滚动反弹屏幕。
Problem 1: But somehow I'm not able to set boundary limits for panning functionality. The page would pan off the screen on overscrolling.
问题2：
此外，似乎图像视图平移/翻译仅在绘制，但不是在现实。因为他们无法点击了此刻他们摆脱他们的屏幕上原来的位置，与放远;可点击的坐标仍然只限于它们原来的位置。
Problem 2: Also, it seems that image-views are panned/translated only in drawing but not in actuality. because they are not clickable anymore the moment they move away from their original position on screen, & the clickable-coordinates remains confined to their original positions only.
我抬头对SO 链接1 几个类似的问题，的链接2 ，链接3 但它们都是基于ImageView的变焦和没有自定义布局变焦。
I looked up several similar questions on SO link 1, link 2, link 3 but they all are based on ImageView zoom and not the custom-layout zoom.
所以与他们不同，我没有在我的ZoomableRelativeLayout我imageviews的参考。引用Imageviews，读取位图和放大器;显示它们是由其他类（; MyPagerFragment类MyPagerActivity＆AMP）的照顾。此外，在上述环节解决方案依赖于矩阵变换，我恐怕无法在我的情况下使用。
So unlike them, I do not have a reference to my imageviews in my ZoomableRelativeLayout. Referencing the Imageviews, reading the bitmaps & displaying them is taken care of by other classes (MyPagerActivity & MyPagerFragment classes). Also, the solution in above mentioned links relies on matrix transformation, which i probably cannot use in my case.
期待有这方面的帮助。
Looking forward to any help on this.
感谢。
推荐答案
有关问题2，你要调整你的所有relativelayout's儿童帆布正确。你应该在你的scalegesturedetector方法onScaleEnd做到这一点。
For the problem 2, you have to resize the canvas rect of all your relativelayout´s children. You should do this in onScaleEnd method of your scalegesturedetector.
public void resizeChildren() {
int childCount = this.getChildCount();
for (int i = 0; i < childCount; i++) {
MyView child = (MyView)this.getChildAt(i);
child.setScaleFactor(mScaleFactor);
child.setCanvasRect(mRect);
}
}
setScaleFactor（）和setCanvasRect（）是MyView的方法，这是一个自定义视图我用手指画。
setScaleFactor() and setCanvasRect() are methods for MyView which is a custom View I use for finger painting.
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