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929 lines
39 KiB
Markdown
929 lines
39 KiB
Markdown
# 独立滚动条控件
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## 1.1 滚动条的定义
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- 滚动条控件的组成部分有箭头(arrow)、滚槽(shaft)、游标(thumb)三部分组成。有的滚动条没有箭头，有的没有滚槽和游标。如图:
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__图 1.1__ 滚动条结构图
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- 滚动条是矩形的，当鼠标击中滚动条，滚动条发送消息给父窗口，父窗口显示更新的窗口内容并更新游标的位置。当鼠标点击箭头时，滚动条也会发消息给父窗口，更新父窗口的内容和游标的位置。
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## 1.2 滚动条的形态
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滚动条有两种形态：一种是以主窗口或者其他控件的一部分出现，通过风格 `WS_HSCROLL`、`WS_VSCROLL` 来指定是否拥有水平、垂直滚动条。主窗口或者控件可以同时拥有这两种风格；另一种是独立控件，控件类名是 `CTRL_SCROLLBAR`，应用程序在创建滚动条控件时，通过 `SBS_HORZ` 或者 `SBS_VERT` 来确定是创建水平滚动条还是垂直滚动条，这两种风格只能选择其一。前者不是本章要介绍的内容，但是毕竟二者有密切的联系，因此，此处作一下必要的介绍。
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## 1.3 独立滚动条的风格
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独立滚动条拥有如下的风格：
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__表 1.1__ 独立滚动条风格
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| 风格标识符 | 意义 |
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|:---------------------|:-------|
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|`SBS_HORZ` | 创建一个水平滚动条。当没有指定 `SBS_BOTTOMALIGN` 或 `SBS_TOPALIGN`，滚动条的范围根据 `CreateWindowEx2` 参数 x,y,w,h 决定。 |
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|`SBS_VERT` | 创建一个垂直滚动条。当没有指定 `SBS_LEFTALIGN` 或 `SBS_RIGHTALIGN`，滚动条的范围根据 `CreateWindowEx2` 参数 x,y,w,h 决定。 |
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|`SBS_BOTTOMALIGN` | 与 `SBS_HORZ` 一起使用。放置水平滚动条在 `CreateWindowEx2` 指定范围的底部。|
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|`SBS_TOPALIGN` | 与 `SBS_HORZ` 一起使用。放置水平滚动条在 `CreateWindowEx2` 指定范围的顶部。 |
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|`SBS_LEFTALIGN` | 与 `SBS_VERT` 一起使用。放置垂直滚动条在 `CreateWindowEx2` 指定范围的左边。|
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|`SBS_RIGHTALIGN` | 与 `SBS_VERT` 一起使用，放置垂直滚动条在 `CreateWindowEx2` 指定范围的右边。|
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|`SBS_NOARROWS` | 没有箭头，不能与 `SBS_NOSHAFT` 一起使用 |
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|`SBS_NOSHAFT` | 没有 `shaft`，不能与 `SBS_NOARROWS` 一起使用 |
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|`SBS_FIXEDBARLEN` | 水平滚动条的 `thumb` 长度固定，或者垂直滚动条的 `thumb` 长度固定 |
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|`SBS_NOTNOTIFYPARENT` | 向父窗口的通知发送方式不是发送通知码，而是发送消息；默认发送通知码 |
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## 1.4 独立滚动条的消息
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应用程序可以向滚动条控件发送下面的消息来进行相应的处理：
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- 获取/设置滚动条的数据信息：`SBM_GETSCROLLINFO`、`SBM_SETSCROLLINFO`
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- 获取/设置当前 `thumb` 的位置： `SBM_GETPOS` 、 `SBM_SETPOS`
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- 获取/设置滚动范围 `range`： `SBM_GETRANGE` 、 `SBM_SETRANGE`
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- 设置滚动范围 `range` 并且立即重绘： `SBM_SETRANGEREDRAW`
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- 启用/禁止箭头 `arrow`: `SBM_ENABLE_ARROW`
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### 1.4.1 获取滚动条信息
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应用程序向滚动条发送 `wParam` 参数为 `SCROLLINFO` *指针的 `SBM_GETSCROLLINFO` 消息获取滚动条控件的最大值、最小值、滚动条所含的页数、当前位置这些信息。所获取到的信息将存放在 `wParam` 所指向的内存里面返回。`SCROLLINFO` 结构体如下：
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```c
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/*
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* Scroll bar information structure.
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*/
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typedef struct _SCROLLINFO
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{
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/** Size of the structrue in bytes */
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UINT cbSize;
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/**
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* A flag indicates which fields contain valid values,
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* can be OR'ed value of the following values:
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* - SIF_RANGE\n
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* Retrives or sets the range of the scroll bar.
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* - SIF_PAGE\n
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* Retrives or sets the page size of the scroll bar.
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* - SIF_POS\n
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* Retrives or sets the position of the scroll bar.
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* - SIF_DISABLENOSCROLL\n
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* Hides the scroll when disabled, not implemented so far.
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*/
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UINT fMask;
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/** The minimum position value of the scroll bar */
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int nMin;
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/** The maximum position value of the scroll bar */
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int nMax;
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/** The page size of the scroll bar */
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UINT nPage;
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/** The position value of the scroll bar */
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int nPos;
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} SCROLLINFO, *PSCROLLINFO;
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```
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通过 `SBM_GETSCROLLINFO` 消息所能获得的信息是由 `SBM_GETSCROLLINFO` 结构体的fMask 来指定的，`fMas` 可取如下表的值：
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__表 1.2__ 滚动条信息列表
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| 信息标识符 | 意义 |
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|:-----------|:------|
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|`SIF_RANGE` | 获取滚动条的取值范围|
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|`SIF_PAGE` | 获取滚动条的页数|
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|`SIF_POS` | 获取滚动条的当前位置|
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|`SIF_ALL` | 获取上面所有的信息|
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下面的示例是获取滚动条控件的所有信息
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```c
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SCROLLINFO scinfo = {0};
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scinfo.fMask = SIF_ALL;
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SendMessage (hwnd_scrollbar, SBM_GETSCROLLINFO, (wParam)&scinfo, 0);
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```
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### 1.4.2 设置滚动条信息
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向滚动条控件发送 `SBM_SETSCROLLINFO` 消息进行滚动条信息设置。参数 `wParam` 为 `SCROLLINFO` 结构体指针，存放有需要设置的滚动条信息。参数 `lParam` 用来确定是否立即重绘，`FALSE` 为不重绘, `TRUE` 则立即重绘。
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下面的示例是对滚动条的信息进行设置，并且不立即进行重绘：
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```c
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SCROLLINFO scinfo = {0};
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scinfo.fMask = SIF_ALL;
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scinfo.nMin = 0;
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scinfo.nMax = 10;
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scinfo.nPage = 2;
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scinfo.nPos = 0;
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BOOL redraw = FALSE;
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SendMessage (hwnd_scrollbar, SBM_SETCROLLINFO, (wParam)&scinfo, redraw);
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```
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### 1.4.3 获取当前游标的位置
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向滚动条发送 `SBM_GETPOS` 消息，就可以获取当前游标所在位置。下面是示例代码：
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```c
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int pos = SendMessage (hwnd_scrollbar, SBM_GETPOS, 0, 0);
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```
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### 1.4.4 设置当前游标的位置
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向滚动条发送 `SBM_SETPOS` 消息，设置滚动条游标当前的位置。目的位置放在参数 `wParam` 中， `lParam` 表示是否立即重绘，`TRUE` 立即重绘，`FALSE` 不重绘。
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```c
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int pos = 10;
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SendMessage (hwnd_scrollbar, SBM_SETPOS, pos, TRUE);
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```
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### 1.4.5 获取滚动条滚动范围
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通过 `SBM_GETRANGE` 消息可以获取滚动条的滚动范围。参数 `wParam` 得到最小范围，`lParam` 得到最大范围。
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```c
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int min, max;
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SendMessage (hwnd_scrollbar, SBM_GETRANGE, &min, &max);
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```
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### 1.4.6 设置滚动条滚动范围
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通过 `SBM_SETRANGE` 消息可以设置滚动条的滚动范围。参数 `wParam` 是设置的最小范围，`lParam` 是设置的最大范围，此消息不会引起滚动条立即重绘。
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下面的代码设置滚动条的滚动范围在 0 至 100 之间，但是需要在别的消息或者事件引起界面重绘时，你才能看到滚动条的变化。
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```c
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SendMessage (hwnd_scrollbar, SBM_SETRANGE, 0, 100);
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```
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### 1.4.7 设置滚动条滚动范围，并立即重绘
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如果需要设置滚动条滚动范围并且要立即重绘的话，则需要向它发送 `SBM_SETRANGEREDRAW` 消息。参数 `wParam` 是设置的最小范围，`lParam` 是设置的最大范围。
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下面的代码设置滚动条的滚动范围在 0 至 100 之间，并且立即重绘。
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```c
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SendMessage (hwnd_scrollbar, SBM_SETRANGEREDRAW, 0, 100);
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```
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### 1.4.8 启用或者禁用滚动条箭头
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通过 `SBM_ENABLE_ARROW` 消息可以启用或者禁止滚动条箭头。所谓禁止就是不能向箭头指向的方向滚动。参数 `wParam` 可以取值如下，`lParam` 为 `TRUE` 表示启用，`FALSE` 表示禁用。
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__表 1.3__ 箭头标识表
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| 箭头标识符 | 意义 |
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|:---------------|:------|
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|`SB_ARROW_LTUP` | 代表水平滚动条的左方向键或者垂直滚动条的上方向键 |
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|`SB_ARROW_BTDN` | 代表水平滚动条的右方向键或者垂直滚动条的下方向键 |
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|`SB_ARROW_BOTH` | 所有方向键 |
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下面的代码将禁用滚动条所有的箭头
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```c
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SendMessage (hwnd_scrollbar, SBM_ENABLE_ARROW, SB_ARROW_BOTH, FALSE);
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```
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## 1.5 滚动条可配置的属性
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滚动条有如下的属性可以通过 `GetWindowElementAttr`、`SetWindowElementAttr`、`GetWindowElementPixelEx`、`SetWindowElementPixelEx` 这些函数来获取与设置。下表是可配置的属性列表及说明：
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__表 1.4__ 通知码列表
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| 属性标识符 | 说明 |
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|:----------------------|:-----|
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|`WE_MAINC_THREED_BODY` | 绘制滚动条滚槽的颜色以及游标的颜色 |
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|`WE_FGC_THREED_BODY` | 绘制箭头的颜色 |
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|`WE_FGC_DISABLED_ITEM` | 绘制无效箭头的颜色 |
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|`WE_METRICS_SCROLLBAR` | 滚动条的尺寸，即水平滚动条的高度、垂直滚动条的宽度 |
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下面的代码演示了对上面属性的操作：
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```c
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DWORD color_3d, fgc_3d, fgc_dis;
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gal_pixel old_brush_color;
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//获取绘制滚动条各个部分的颜色属性值
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color_3d = GetWindowElementAttr(hWnd, WE_MAINC_THREED_BODY);
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fgc_3d = GetWindowElementAttr(hWnd, WE_FGC_THREED_BODY);
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fgc_dis = GetWindowElementAttr(hWnd, WE_FGC_DISABLED_ITEM);
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//绘制滚动条滚槽
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old_brush_color = SetBrushColor(hdc,
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RGBA2Pixel(hdc,GetRValue(color_3d),
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GetGValue(color_3d), GetBValue(color_3d),
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GetAValue(color_3d)));
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FillBox(hdc, rect.left, rect.top, RECTW(rect), RECTH(rect));
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SetBrushColor(hdc, old_brush_color);
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//绘制滚动条箭头
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draw_3dbox(hdc, &rect, color_3d,
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bn_status | LFRDR_3DBOX_THICKFRAME | LFRDR_3DBOX_FILLED);
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if(sb_status & SBS_DISABLED_LTUP || sb_status & SBS_DISABLED)
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draw_arrow(hWnd, hdc, &rect, fgc_dis, LFRDR_ARROW_LEFT);
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else
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draw_arrow(hWnd, hdc, &rect, fgc_3d, LFRDR_ARROW_LEFT);
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```
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## 1.6 滚动条通知码
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滚动条所拥有的通知码如下表：
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__表 1.5__ 通知码列表
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| 通知码标识符 | 意义 |
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|:------------------|:----|
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|`SB_LINEUP` | 垂直滚动条向上滚一行 |
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|`SB_LINEDOWN` | 垂直滚动条向下滚一行 |
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|`SB_PAGEUP` | 垂直滚动条向上滚一页 |
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|`SB_PAGEDOWN` | 垂直滚动条向下滚一页 |
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|`SB_LINELEFT` | 水平滚动条向左滚一列 |
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|`SB_LINERIGHT` | 水平滚动条向右滚一列 |
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|`SB_PAGELEFT` | 水平滚动条向左滚一列页 |
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|`SB_PAGERIGHT` | 水平滚动条向右滚一页 |
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|`SB_THUMBPOSITION` | 当游标被鼠标左键按住拖动，然后释放，此时的游标位置将由此通知码传给父窗口 |
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|`SB_THUMBTRACK` | 当游标被鼠标左键按住，在拖动游标的过程中，游标的位置将由此通知码不断的传给父窗口 |
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|`SB_TOP` | 游标到了水平滚动条的最左边或者是垂直滚动条的最上边，即到了滚动条的最小值 |
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|`SB_BOTTOM` | 游标到了水平滚动条的最右边或者是垂直滚动条的最下边，即到了滚动条的最大值|
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- 当滚动条指定了风格 `SBS_NOTNOTIFYPARENT` 时，水平滚动条的父窗口将会收到 `MSG_HSCROLL` 消息，垂直滚动条的父窗口将会收到 `MSG_VSCROLL` 消息， 参数 `wParam` 为通知码 `id`， 当 `id` 为 `SB_THUMBPOSITION`,`SB_THUMBTRACK` 时，`lParam` 为游标的当前位置 `curPos`，其他情况下 `lParam` 没有意义。
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- 当滚动条没有指定风格 `SBS_NOTNOTIFYPARENT` 时，滚动条的父窗口将会收到通知码，参数 `wParam` 包含控件 `ID` 和通知码。当通知码为 `SB_THUMBPOSITION`,`SB_THUMBTRACK` 时，父窗口可以通过发送 `SBM_GETPOS` 来获取游标的当前位置 `curPos`。当然，如果你调用 `SetNotificationCallback` 函数设定了滚动条控件的通知回调函数，则控件不会向父窗口发送 `MSG_COMMAND `通知消息，而是会直接调用设定的通知回调函数。
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### 1.6.1 通知消息的触发
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滚动条可以接收鼠标和键盘事件，并根据不同的情况触发不同的通知消息。
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- 当鼠标点击滚动条不同部位时，会触发不同的通知消息。另外，要注意的是，用鼠标左键拖动游标的过程中，滚动条会不断发送 `SB_THUMBTRACK` 通知消息，鼠标左键释放后会发送 `SB_THUMBPOSITIO` 消息。滚动条各个部位所触发的消息，请见下图：
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__图 1.2__ 鼠标触发的通知消息
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- 键盘按键会触发相应的通知消息，具体如下表所示：
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__表 1.6__ 通知码列表
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| 按键 | 通知码 |
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|:-------------|:------|
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|`PAGEUP` 键 | 水平滚动条发送 `SB_PAGELEFT` ；垂直滚动条发送 `SB_PAGEUP` |
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|`PAGEDOWN` 键 | 水平滚动条发送 `SB_PAGERIGHT` ；垂直滚动条发送 `SB_PAGEDOWN` |
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|上方向键 | 垂直滚动条发送 `SB_LINEUP` |
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|左方向键 | 水平滚动条发送 `SB_LINELEFT` |
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|下方向键 | 垂直滚动条发送 `SB_LINEDOWN` |
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|右方向键 | 水平滚动条发送 `SB_LINERIGHT` |
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|`HOME` 键 | `SB_TOP` |
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|`END` 键 | `SB_BOTTOM` |
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## 1.7 编程示例
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下面的代码给出了各种样式的滚动条的创建示例。通过鼠标或者按键，你可以对滚动条进行点击、拖动等操作。为了使演示更生动，本示例还在界面的右边放置了一个圆圈和方块，随着你控制滚动条上下或者左右滚动，圆圈会变大变小，方块会上下移动。示例的效果如__图 1.3__ 所示，代码摘自示例程序包 `mg-samples` 中的 `scrollbar_ctrl.c` 文件，完整代码请见此文件。
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__清单 1.1__ 滚动条示例代码
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```c
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#include <stdio.h>
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#include <string.h>
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#include <minigui/common.h>
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#include <minigui/minigui.h>
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#include <minigui/gdi.h>
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#include <minigui/window.h>
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#include <minigui/control.h>
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#ifdef _LANG_ZHCN
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#include "scrollbar_ctrl_res_cn.h"
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#elif defined _LANG_ZHTW
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#include "scrollbar_ctrl_res_tw.h"
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#else
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#include "scrollbar_ctrl_res_en.h"
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#endif
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/** define scrollbar data */
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#define SB_MAX 20
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#define SB_MIN 0
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#define SB_PAGE 6
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||
|
||
/** define circle data */
|
||
#define CC_CENTER_X 400
|
||
#define CC_CENTER_Y 100
|
||
#define CC_RADIUS_MAX 50
|
||
#define CC_RADIUS_MIN 0
|
||
|
||
/** define box data */
|
||
#define BOX_WIDTH 40
|
||
#define BOX_HEIGHT 20
|
||
#define BOX_Y_MAX 300
|
||
#define BOX_Y_MIN 200
|
||
|
||
/** x position of separator */
|
||
#define SEP 300
|
||
|
||
/** radius of circle */
|
||
int _radius;
|
||
|
||
/** y position of box */
|
||
int _box_pos_y;
|
||
|
||
/** invalidate rect */
|
||
RECT _rect_invalid;
|
||
|
||
static int ScrollbarProc(HWND hwnd, int message, WPARAM wParam, LPARAM lParam)
|
||
{
|
||
/** IDC of SCROLLBAR control */
|
||
static int _my_scroll_idc = 100;
|
||
|
||
/** scrollbar handle of main window */
|
||
static HWND hwnd_sb_main;
|
||
|
||
/** scrollbar handle of control */
|
||
HWND hwnd_sb_ctrl;
|
||
|
||
switch (message)
|
||
{
|
||
case MSG_CREATE:
|
||
{
|
||
_rect_invalid.left = SEP;
|
||
_rect_invalid.top = 0;
|
||
_rect_invalid.right = g_rcScr.right;
|
||
_rect_invalid.bottom = g_rcScr.bottom;
|
||
|
||
SCROLLINFO scinfo = {0};
|
||
scinfo.fMask = SIF_ALL;
|
||
scinfo.nMin = SB_MIN;
|
||
scinfo.nMax = SB_MAX;
|
||
scinfo.nPage = SB_PAGE;
|
||
scinfo.nPos = SB_MIN;
|
||
|
||
calc_circle_pos (scinfo.nPos);
|
||
calc_box_pos (scinfo.nPos);
|
||
|
||
/** classic VSCROLL with SBS_NOTNOTIFYPARENT */
|
||
|
||
hwnd_sb_main = CreateWindowEx2 (CTRL_SCROLLBAR, "",
|
||
WS_VISIBLE |
|
||
SBS_VERT | SBS_LEFTALIGN
|
||
| SBS_NOTNOTIFYPARENT
|
||
,
|
||
0,
|
||
++_my_scroll_idc,
|
||
20, 50, 20, 150, hwnd,
|
||
"classic", 0,
|
||
0);
|
||
|
||
SendMessage (hwnd_sb_main, SBM_SETSCROLLINFO, (WPARAM)&scinfo, TRUE);
|
||
SendMessage (hwnd_sb_main, MSG_SETFOCUS, 0, 0);
|
||
|
||
/** flat VSCROLL */
|
||
|
||
hwnd_sb_ctrl = CreateWindowEx2 (CTRL_SCROLLBAR, "",
|
||
WS_VISIBLE |
|
||
SBS_VERT | SBS_LEFTALIGN
|
||
,
|
||
0,
|
||
++_my_scroll_idc,
|
||
43, 50, 20, 150, hwnd,
|
||
"flat", 0,
|
||
0);
|
||
|
||
SendMessage (hwnd_sb_ctrl, SBM_SETSCROLLINFO, (WPARAM)&scinfo, TRUE);
|
||
SendMessage (hwnd_sb_ctrl, MSG_SETFOCUS, 0, 0);
|
||
|
||
/** fashion VSCROLL */
|
||
|
||
hwnd_sb_ctrl = CreateWindowEx2 (CTRL_SCROLLBAR, "",
|
||
WS_VISIBLE |
|
||
SBS_VERT | SBS_LEFTALIGN
|
||
,
|
||
0,
|
||
++_my_scroll_idc,
|
||
66, 50, 20, 150, hwnd,
|
||
"fashion", 0,
|
||
0);
|
||
|
||
SendMessage (hwnd_sb_ctrl, SBM_SETSCROLLINFO, (WPARAM)&scinfo, TRUE);
|
||
SendMessage (hwnd_sb_ctrl, MSG_SETFOCUS, 0, 0);
|
||
|
||
/** tiny VSCROLL */
|
||
|
||
hwnd_sb_ctrl = CreateWindowEx2 (CTRL_SCROLLBAR, "",
|
||
WS_VISIBLE |
|
||
SBS_VERT | SBS_LEFTALIGN
|
||
,
|
||
0,
|
||
++_my_scroll_idc,
|
||
92, 50, 20, 150, hwnd,
|
||
"tiny", 0,
|
||
0);
|
||
|
||
SendMessage (hwnd_sb_ctrl, SBM_SETSCROLLINFO, (WPARAM)&scinfo, TRUE);
|
||
SendMessage (hwnd_sb_ctrl, MSG_SETFOCUS, 0, 0);
|
||
|
||
/** classic NOSHAFT VSCROLL */
|
||
|
||
hwnd_sb_ctrl = CreateWindowEx2 (CTRL_SCROLLBAR, "",
|
||
WS_VISIBLE | SBS_VERT | SBS_NOSHAFT | SBS_LEFTALIGN
|
||
,
|
||
0,
|
||
++_my_scroll_idc,
|
||
120, 50, 20, 34, hwnd,
|
||
"classic", 0,
|
||
0);
|
||
|
||
SendMessage (hwnd_sb_ctrl, SBM_SETSCROLLINFO, (WPARAM)&scinfo, TRUE);
|
||
SendMessage (hwnd_sb_ctrl, MSG_SETFOCUS, 0, 0);
|
||
|
||
/** flat NOSHAFT VSCROLL */
|
||
|
||
hwnd_sb_ctrl = CreateWindowEx2 (CTRL_SCROLLBAR, "",
|
||
WS_VISIBLE | SBS_VERT | SBS_NOSHAFT | SBS_LEFTALIGN
|
||
,
|
||
0,
|
||
++_my_scroll_idc,
|
||
140, 50, 20, 34, hwnd,
|
||
"flat", 0,
|
||
0);
|
||
|
||
SendMessage (hwnd_sb_ctrl, SBM_SETSCROLLINFO, (WPARAM)&scinfo, TRUE);
|
||
SendMessage (hwnd_sb_ctrl, MSG_SETFOCUS, 0, 0);
|
||
|
||
/** fashion NOSHAFT VSCROLL */
|
||
|
||
hwnd_sb_ctrl = CreateWindowEx2 (CTRL_SCROLLBAR, "",
|
||
WS_VISIBLE | SBS_VERT | SBS_NOSHAFT | SBS_LEFTALIGN
|
||
,
|
||
0,
|
||
++_my_scroll_idc,
|
||
160, 50, 20, 34, hwnd,
|
||
"fashion", 0,
|
||
0);
|
||
|
||
SendMessage (hwnd_sb_ctrl, SBM_SETSCROLLINFO, (WPARAM)&scinfo, TRUE);
|
||
SendMessage (hwnd_sb_ctrl, MSG_SETFOCUS, 0, 0);
|
||
|
||
/** tiny NOSHAFT VSCROLL */
|
||
|
||
hwnd_sb_ctrl = CreateWindowEx2 (CTRL_SCROLLBAR, "",
|
||
WS_VISIBLE | SBS_VERT | SBS_NOSHAFT | SBS_LEFTALIGN
|
||
,
|
||
0,
|
||
++_my_scroll_idc,
|
||
184, 50, 20, 34, hwnd,
|
||
"tiny", 0,
|
||
0);
|
||
|
||
SendMessage (hwnd_sb_ctrl, SBM_SETSCROLLINFO, (WPARAM)&scinfo, TRUE);
|
||
SendMessage (hwnd_sb_ctrl, MSG_SETFOCUS, 0, 0);
|
||
|
||
/** classic NOARROW VSCROLL */
|
||
|
||
hwnd_sb_ctrl = CreateWindowEx2 (CTRL_SCROLLBAR, "",
|
||
WS_VISIBLE | SBS_VERT | SBS_NOARROW | SBS_LEFTALIGN
|
||
,
|
||
0,
|
||
++_my_scroll_idc,
|
||
210, 50, 20, 150, hwnd,
|
||
"classic", 0,
|
||
0);
|
||
|
||
SendMessage (hwnd_sb_ctrl, SBM_SETSCROLLINFO, (WPARAM)&scinfo, TRUE);
|
||
SendMessage (hwnd_sb_ctrl, MSG_SETFOCUS, 0, 0);
|
||
|
||
/** flat NOARROW VSCROLL */
|
||
|
||
hwnd_sb_ctrl = CreateWindowEx2 (CTRL_SCROLLBAR, "",
|
||
WS_VISIBLE | SBS_VERT | SBS_NOARROW | SBS_LEFTALIGN
|
||
,
|
||
0,
|
||
++_my_scroll_idc,
|
||
232, 50, 20, 150, hwnd,
|
||
"flat", 0,
|
||
0);
|
||
|
||
SendMessage (hwnd_sb_ctrl, SBM_SETSCROLLINFO, (WPARAM)&scinfo, TRUE);
|
||
SendMessage (hwnd_sb_ctrl, MSG_SETFOCUS, 0, 0);
|
||
|
||
/** fashion NOARROW VSCROLL */
|
||
|
||
hwnd_sb_ctrl = CreateWindowEx2 (CTRL_SCROLLBAR, "",
|
||
WS_VISIBLE | SBS_VERT | SBS_NOARROW | SBS_LEFTALIGN
|
||
,
|
||
0,
|
||
++_my_scroll_idc,
|
||
254, 50, 20, 150, hwnd,
|
||
"fashion", 0,
|
||
0);
|
||
|
||
SendMessage (hwnd_sb_ctrl, SBM_SETSCROLLINFO, (WPARAM)&scinfo, TRUE);
|
||
SendMessage (hwnd_sb_ctrl, MSG_SETFOCUS, 0, 0);
|
||
|
||
/** tiny NOARROW VSCROLL */
|
||
|
||
hwnd_sb_ctrl = CreateWindowEx2 (CTRL_SCROLLBAR, "",
|
||
WS_VISIBLE | SBS_VERT | SBS_NOARROW | SBS_LEFTALIGN
|
||
,
|
||
0,
|
||
++_my_scroll_idc,
|
||
276, 50, 20, 150, hwnd,
|
||
"tiny", 0,
|
||
0);
|
||
|
||
SendMessage (hwnd_sb_ctrl, SBM_SETSCROLLINFO, (WPARAM)&scinfo, TRUE);
|
||
SendMessage (hwnd_sb_ctrl, MSG_SETFOCUS, 0, 0);
|
||
|
||
/** classic HSCROLL */
|
||
|
||
hwnd_sb_ctrl = CreateWindowEx2 (CTRL_SCROLLBAR, "",
|
||
WS_VISIBLE | SBS_HORZ
|
||
| SBS_TOPALIGN
|
||
,
|
||
0,
|
||
++_my_scroll_idc,
|
||
20, 220, 150, 20, hwnd,
|
||
"classic", 0,
|
||
0);
|
||
|
||
SendMessage (hwnd_sb_ctrl, SBM_SETSCROLLINFO, (WPARAM)&scinfo, TRUE);
|
||
SendMessage (hwnd_sb_ctrl, MSG_SETFOCUS, 0, 0);
|
||
|
||
/** flat HSCROLL */
|
||
|
||
hwnd_sb_ctrl = CreateWindowEx2 (CTRL_SCROLLBAR, "",
|
||
WS_VISIBLE | SBS_HORZ
|
||
| SBS_TOPALIGN
|
||
,
|
||
0,
|
||
++_my_scroll_idc,
|
||
20, 240, 150, 20, hwnd,
|
||
"flat", 0,
|
||
0);
|
||
|
||
SendMessage (hwnd_sb_ctrl, SBM_SETSCROLLINFO, (WPARAM)&scinfo, TRUE);
|
||
SendMessage (hwnd_sb_ctrl, MSG_SETFOCUS, 0, 0);
|
||
|
||
/** fashion HSCROLL */
|
||
|
||
hwnd_sb_ctrl = CreateWindowEx2 (CTRL_SCROLLBAR, "",
|
||
WS_VISIBLE | SBS_HORZ
|
||
| SBS_TOPALIGN
|
||
,
|
||
0,
|
||
++_my_scroll_idc,
|
||
20, 260, 150, 20, hwnd,
|
||
"fashion", 0,
|
||
0);
|
||
|
||
SendMessage (hwnd_sb_ctrl, SBM_SETSCROLLINFO, (WPARAM)&scinfo, TRUE);
|
||
SendMessage (hwnd_sb_ctrl, MSG_SETFOCUS, 0, 0);
|
||
|
||
/** tiny HSCROLL */
|
||
|
||
hwnd_sb_ctrl = CreateWindowEx2 (CTRL_SCROLLBAR, "",
|
||
WS_VISIBLE | SBS_HORZ
|
||
| SBS_TOPALIGN
|
||
,
|
||
0,
|
||
++_my_scroll_idc,
|
||
20, 280, 150, 20, hwnd,
|
||
"tiny", 0,
|
||
0);
|
||
|
||
SendMessage (hwnd_sb_ctrl, SBM_SETSCROLLINFO, (WPARAM)&scinfo, TRUE);
|
||
SendMessage (hwnd_sb_ctrl, MSG_SETFOCUS, 0, 0);
|
||
}
|
||
break;
|
||
|
||
case MSG_COMMAND:
|
||
{
|
||
int code = HIWORD(wParam);
|
||
HWND scroll = (HWND)lParam;
|
||
int pos = 0;
|
||
|
||
switch (code)
|
||
{
|
||
case SB_LINELEFT:
|
||
{
|
||
pos = SendMessage (scroll, SBM_GETPOS, 0, 0);
|
||
|
||
SendMessage (scroll, SBM_SETPOS, --pos, TRUE);
|
||
}
|
||
|
||
break;
|
||
|
||
case SB_LINERIGHT:
|
||
{
|
||
pos = SendMessage (scroll, SBM_GETPOS, 0, 0);
|
||
|
||
SendMessage (scroll, SBM_SETPOS, ++pos, TRUE);
|
||
}
|
||
break;
|
||
|
||
case SB_PAGELEFT:
|
||
{
|
||
pos = SendMessage (scroll, SBM_GETPOS, 0, 0);
|
||
|
||
pos -= SB_PAGE;
|
||
SendMessage (scroll, SBM_SETPOS, pos, TRUE);
|
||
}
|
||
break;
|
||
|
||
case SB_PAGERIGHT:
|
||
{
|
||
pos = SendMessage (scroll, SBM_GETPOS, 0, 0);
|
||
|
||
pos += SB_PAGE;
|
||
SendMessage (scroll, SBM_SETPOS, pos, TRUE);
|
||
}
|
||
break;
|
||
|
||
case SB_LINEUP:
|
||
{
|
||
pos = SendMessage (scroll, SBM_GETPOS, 0, 0);
|
||
|
||
SendMessage (scroll, SBM_SETPOS, --pos, TRUE);
|
||
}
|
||
|
||
break;
|
||
|
||
case SB_LINEDOWN:
|
||
{
|
||
pos = SendMessage (scroll, SBM_GETPOS, 0, 0);
|
||
|
||
SendMessage (scroll, SBM_SETPOS, ++pos, TRUE);
|
||
}
|
||
break;
|
||
|
||
case SB_PAGEUP:
|
||
{
|
||
pos = SendMessage (scroll, SBM_GETPOS, 0, 0);
|
||
|
||
pos -= SB_PAGE;
|
||
SendMessage (scroll, SBM_SETPOS, pos, TRUE);
|
||
}
|
||
break;
|
||
|
||
case SB_PAGEDOWN:
|
||
{
|
||
pos = SendMessage (scroll, SBM_GETPOS, 0, 0);
|
||
|
||
pos += SB_PAGE;
|
||
SendMessage (scroll, SBM_SETPOS, pos, TRUE);
|
||
}
|
||
break;
|
||
|
||
case SB_THUMBPOSITION:
|
||
{
|
||
pos = SendMessage (scroll, SBM_GETPOS, 0, 0);
|
||
}
|
||
break;
|
||
|
||
case SB_THUMBTRACK:
|
||
{
|
||
pos = SendMessage (scroll, SBM_GETPOS, 0, 0);
|
||
}
|
||
break;
|
||
|
||
case SB_TOP:
|
||
{
|
||
pos = SB_MIN;
|
||
}
|
||
break;
|
||
|
||
case SB_BOTTOM:
|
||
{
|
||
pos = SB_MAX;
|
||
}
|
||
break;
|
||
|
||
default:
|
||
break;
|
||
}
|
||
|
||
draw_shape (hwnd, pos);
|
||
}
|
||
break;
|
||
|
||
case MSG_HSCROLL:
|
||
{
|
||
int pos = 0;
|
||
switch (wParam)
|
||
{
|
||
case SB_LINELEFT:
|
||
{
|
||
pos = SendMessage (hwnd_sb_main, SBM_GETPOS, 0, 0);
|
||
|
||
SendMessage (hwnd_sb_main, SBM_SETPOS, --pos, TRUE);
|
||
}
|
||
|
||
break;
|
||
|
||
case SB_LINERIGHT:
|
||
{
|
||
pos = SendMessage (hwnd_sb_main, SBM_GETPOS, 0, 0);
|
||
|
||
SendMessage (hwnd_sb_main, SBM_SETPOS, ++pos, TRUE);
|
||
}
|
||
break;
|
||
|
||
case SB_PAGELEFT:
|
||
{
|
||
pos = SendMessage (hwnd_sb_main, SBM_GETPOS, 0, 0);
|
||
|
||
pos -= SB_PAGE;
|
||
SendMessage (hwnd_sb_main, SBM_SETPOS, pos, TRUE);
|
||
}
|
||
break;
|
||
|
||
case SB_PAGERIGHT:
|
||
{
|
||
pos = SendMessage (hwnd_sb_main, SBM_GETPOS, 0, 0);
|
||
|
||
pos += SB_PAGE;
|
||
SendMessage (hwnd_sb_main, SBM_SETPOS, pos, TRUE);
|
||
}
|
||
break;
|
||
case SB_THUMBPOSITION:
|
||
{
|
||
pos = (int)lParam;
|
||
}
|
||
break;
|
||
|
||
case SB_THUMBTRACK:
|
||
{
|
||
pos = (int)lParam;
|
||
}
|
||
break;
|
||
|
||
case SB_TOP:
|
||
{
|
||
pos = SB_MIN;
|
||
}
|
||
break;
|
||
|
||
case SB_BOTTOM:
|
||
{
|
||
pos = SB_MAX;
|
||
}
|
||
break;
|
||
|
||
default:
|
||
break;
|
||
}
|
||
draw_shape (hwnd, pos);
|
||
}
|
||
break;
|
||
|
||
case MSG_VSCROLL:
|
||
{
|
||
int pos = 0;
|
||
switch (wParam)
|
||
{
|
||
case SB_LINEUP:
|
||
{
|
||
pos = SendMessage (hwnd_sb_main, SBM_GETPOS, 0, 0);
|
||
|
||
SendMessage (hwnd_sb_main, SBM_SETPOS, --pos, TRUE);
|
||
|
||
}
|
||
|
||
break;
|
||
|
||
case SB_LINEDOWN:
|
||
{
|
||
pos = SendMessage (hwnd_sb_main, SBM_GETPOS, 0, 0);
|
||
|
||
SendMessage (hwnd_sb_main, SBM_SETPOS, ++pos, TRUE);
|
||
}
|
||
break;
|
||
|
||
case SB_PAGEUP:
|
||
{
|
||
pos = SendMessage (hwnd_sb_main, SBM_GETPOS, 0, 0);
|
||
|
||
pos -= SB_PAGE;
|
||
SendMessage (hwnd_sb_main, SBM_SETPOS, pos, TRUE);
|
||
}
|
||
break;
|
||
|
||
case SB_PAGEDOWN:
|
||
{
|
||
pos = SendMessage (hwnd_sb_main, SBM_GETPOS, 0, 0);
|
||
|
||
pos += SB_PAGE;
|
||
SendMessage (hwnd_sb_main, SBM_SETPOS, pos, TRUE);
|
||
}
|
||
break;
|
||
case SB_THUMBPOSITION:
|
||
{
|
||
pos = (int)lParam;
|
||
}
|
||
break;
|
||
|
||
case SB_THUMBTRACK:
|
||
{
|
||
pos = (int)lParam;
|
||
}
|
||
break;
|
||
|
||
case SB_TOP:
|
||
{
|
||
pos = SB_MIN;
|
||
}
|
||
break;
|
||
|
||
case SB_BOTTOM:
|
||
{
|
||
pos = SB_MAX;
|
||
}
|
||
break;
|
||
default:
|
||
break;
|
||
}
|
||
draw_shape (hwnd, pos);
|
||
}
|
||
break;
|
||
|
||
case MSG_PAINT:
|
||
{
|
||
HDC hdc = BeginPaint(hwnd);
|
||
|
||
/** separator */
|
||
MoveTo (hdc, SEP, 0);
|
||
LineTo (hdc, SEP, g_rcScr.bottom);
|
||
|
||
/** circle */
|
||
Circle (hdc, CC_CENTER_X, CC_CENTER_Y, _radius);
|
||
|
||
/** top and bottom line of box */
|
||
MoveTo (hdc, SEP + 20, BOX_Y_MIN);
|
||
LineTo (hdc, SEP + 20 + BOX_WIDTH + 40, BOX_Y_MIN);
|
||
|
||
MoveTo (hdc, SEP + 20, BOX_Y_MAX);
|
||
LineTo (hdc, SEP + 20 + BOX_WIDTH + 40, BOX_Y_MAX);
|
||
|
||
/** box */
|
||
SetBrushColor (hdc, PIXEL_black);
|
||
FillBox (hdc, SEP + 40, _box_pos_y, BOX_WIDTH, BOX_HEIGHT);
|
||
|
||
EndPaint (hwnd, hdc);
|
||
}
|
||
break;
|
||
|
||
case MSG_CLOSE:
|
||
{
|
||
DestroyMainWindow (hwnd);
|
||
PostQuitMessage (hwnd);
|
||
return 0;
|
||
}
|
||
}
|
||
|
||
return DefaultMainWinProc(hwnd, message, wParam, lParam);
|
||
}
|
||
|
||
int MiniGUIMain (int argc, const char* argv[])
|
||
{
|
||
MSG Msg;
|
||
HWND hMainWnd;
|
||
MAINWINCREATE CreateInfo;
|
||
|
||
#ifdef _MGRM_PROCESSES
|
||
JoinLayer(NAME_DEF_LAYER , "scrollbar" , 0 , 0);
|
||
#endif
|
||
|
||
CreateInfo.dwStyle = WS_VISIBLE | WS_BORDER | WS_CAPTION;
|
||
CreateInfo.dwExStyle = WS_EX_NONE;
|
||
CreateInfo.spCaption = SCB_ST_CAP;
|
||
CreateInfo.hMenu = 0;
|
||
CreateInfo.hCursor = GetSystemCursor(0);
|
||
CreateInfo.hIcon = 0;
|
||
CreateInfo.MainWindowProc = ScrollbarProc;
|
||
CreateInfo.lx = 0;
|
||
CreateInfo.ty = 0;
|
||
CreateInfo.rx = g_rcScr.right;
|
||
CreateInfo.by = g_rcScr.bottom;
|
||
CreateInfo.iBkColor = COLOR_lightwhite;
|
||
CreateInfo.dwAddData = 0;
|
||
CreateInfo.hHosting = HWND_DESKTOP;
|
||
|
||
hMainWnd = CreateMainWindowEx (&CreateInfo, "flat", 0, 0, 0);
|
||
|
||
if (hMainWnd == HWND_INVALID)
|
||
{
|
||
return -1;
|
||
}
|
||
|
||
ShowWindow(hMainWnd, SW_SHOWNORMAL);
|
||
|
||
while (GetMessage(&Msg, hMainWnd)) {
|
||
TranslateMessage(&Msg);
|
||
DispatchMessage(&Msg);
|
||
}
|
||
|
||
MainWindowThreadCleanup (hMainWnd);
|
||
|
||
return 0;
|
||
}
|
||
|
||
#ifdef _MGRM_THREADS
|
||
#include <minigui/dti.c>
|
||
#endif
|
||
```
|
||
|
||
__图 1.3__ 滚动条控件
|
||
|