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abe8358fff
修改数据项(ItemsBase)相关数据结构定义为动态链表，允许运行时增减项目。 相关的列表、菜单等项目也进行了适应性修改。 为数据项(ItemsBase)、列表(List)和菜单(Menu)增加了一些数据操作接口。 更新了菜单、列表的演示程序。 修正了滚动条的部分代码，增加了一些接口函数。
137 lines
5.4 KiB
C
137 lines
5.4 KiB
C
/*************************************************************************/
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/** Copyright. **/
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/** FileName: SGUI_ScrollBar.c **/
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/** Author: XuYulin **/
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/** Description: Create and display a scrollbar on screen. **/
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/*************************************************************************/
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//=======================================================================//
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//= Include files. =//
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//=======================================================================//
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#include "SGUI_ScrollBar.h"
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//=======================================================================//
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//= Function define. =//
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//=======================================================================//
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/*************************************************************************/
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/** Function Name: SGUI_ScrollBar_Initialize **/
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/** Purpose: Initialize a scroll bar structure. **/
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/** Params: **/
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/** @ pstObj[in]: Scroll bar object pointer. **/
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/** @ pcstInitParam[in]: Initialize parameter data. **/
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/** Return: None. **/
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/*************************************************************************/
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void SGUI_ScrollBar_Initialize(SGUI_SCROLLBAR_STRUCT* pstObj, const SGUI_SCROLLBAR_PARAM* pcstInitParam)
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{
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/*----------------------------------*/
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/* Process */
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/*----------------------------------*/
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if((NULL != pstObj) && (NULL != pcstInitParam))
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{
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SGUI_SystemIF_MemorySet(pstObj, 0x00, sizeof(SGUI_SCROLLBAR_STRUCT));
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SGUI_SystemIF_MemoryCopy(&(pstObj->stParam), (void*)pcstInitParam, sizeof(SGUI_SCROLLBAR_PARAM));
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}
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}
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/*************************************************************************/
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/** Function Name: SGUI_ScrollBar_SetValue **/
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/** Purpose: Initialize a scroll bar structure. **/
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/** Params: **/
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/** @ pstObj[in]: Scroll bar object pointer. **/
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/** @ sNewValue[in]: New value will be set. **/
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/** Return: None. **/
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/*************************************************************************/
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void SGUI_ScrollBar_SetValue(SGUI_SCROLLBAR_STRUCT* pstObj, SGUI_SIZE sNewValue)
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{
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if(NULL != pstObj)
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{
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if(sNewValue > pstObj->stParam.sMaxValue)
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{
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pstObj->stData.sValue = pstObj->stParam.sMaxValue;
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}
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else
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{
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pstObj->stData.sValue = sNewValue;
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}
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}
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}
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/*************************************************************************/
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/** Function Name: SGUI_ScrollBar_RefreshScrollBar **/
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/** Purpose: Display or update a scroll bar. **/
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/** Resources: Scroll bar data structure. **/
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/** Params: **/
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/** @ pstObj[in]: Scroll bar data structure pointer. **/
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/** Return: None. **/
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/** Notice: None. **/
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/*************************************************************************/
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void SGUI_ScrollBar_Repaint(SGUI_SCR_DEV* pstDeviceIF, SGUI_SCROLLBAR_STRUCT* pstObj)
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{
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/*----------------------------------*/
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/* Variable Declaration */
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/*----------------------------------*/
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SGUI_INT uiScrollBlockPos;
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SGUI_SIZE uiScrollBlockSize;
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/*----------------------------------*/
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/* Initialize */
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/*----------------------------------*/
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if(SGUI_SCROLLBAR_VERTICAL == pstObj->stParam.eDirection)
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{
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uiScrollBlockSize = pstObj->stParam.stLayout.iWidth-2;
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}
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else
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{
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uiScrollBlockSize = pstObj->stParam.stLayout.iHeight-2;
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}
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/*----------------------------------*/
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/* Process */
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/*----------------------------------*/
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if(((pstObj->stParam.stLayout.iHeight > 2) && (pstObj->stParam.stLayout.iWidth > 2)) && (pstObj->stParam.stLayout.iHeight != pstObj->stParam.stLayout.iWidth))
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{
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// Check new value must be less then max value.
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if(pstObj->stData.sValue > pstObj->stParam.sMaxValue)
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{
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pstObj->stData.sValue = pstObj->stParam.sMaxValue;
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}
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// Draw scroll bar edge.
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SGUI_Basic_DrawRectangle(pstDeviceIF, pstObj->stParam.stLayout.iX, pstObj->stParam.stLayout.iY,
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pstObj->stParam.stLayout.iWidth, pstObj->stParam.stLayout.iHeight,
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SGUI_COLOR_FRGCLR, SGUI_COLOR_BKGCLR);
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if(SGUI_SCROLLBAR_VERTICAL == pstObj->stParam.eDirection)
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{
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// Value lower limit is 0, scroll blocks must be greater then 0.
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if(pstObj->stParam.sMaxValue > 0)
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{
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uiScrollBlockPos = pstObj->stParam.stLayout.iY+1+((pstObj->stParam.stLayout.iHeight-uiScrollBlockSize-2)*pstObj->stData.sValue/pstObj->stParam.sMaxValue);
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// Redraw process block
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SGUI_Basic_DrawRectangle(pstDeviceIF, pstObj->stParam.stLayout.iX+1, uiScrollBlockPos,
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uiScrollBlockSize, uiScrollBlockSize, SGUI_COLOR_FRGCLR, SGUI_COLOR_FRGCLR);
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}
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else
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{
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SGUI_Basic_DrawRectangle(pstDeviceIF, pstObj->stParam.stLayout.iX+1, pstObj->stParam.stLayout.iY+1,
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uiScrollBlockSize, uiScrollBlockSize, SGUI_COLOR_FRGCLR, SGUI_COLOR_FRGCLR);
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}
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}
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else // Horizontal
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{
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// Value lower limit is 0, scroll blocks must be greater then 0.
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if(pstObj->stParam.sMaxValue > 0)
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{
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uiScrollBlockPos = pstObj->stParam.stLayout.iX+1+((pstObj->stParam.stLayout.iWidth-uiScrollBlockSize-2)*pstObj->stData.sValue/pstObj->stParam.sMaxValue);
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// Redraw process block
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SGUI_Basic_DrawRectangle(pstDeviceIF, uiScrollBlockPos, pstObj->stParam.stLayout.iY+1,
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uiScrollBlockSize, uiScrollBlockSize, SGUI_COLOR_FRGCLR, SGUI_COLOR_FRGCLR);
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}
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else
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{
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SGUI_Basic_DrawRectangle(pstDeviceIF, pstObj->stParam.stLayout.iX+1, pstObj->stParam.stLayout.iY+1,
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uiScrollBlockSize, uiScrollBlockSize, SGUI_COLOR_FRGCLR, SGUI_COLOR_FRGCLR);
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}
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}
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}
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}
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