我正在现有的 C++ CodeGear 项目中创建搜索功能。
当您双击一个单词时,所有出现该单词的背景都会像在 notepad++ 中一样涂成绿色。
在应用颜色之前,我将原始的 TRichEDit
文本保存在 TMemoryStream 中以便能够取回原始文本。我在 TRichEdit
中将颜色重置为正常的点击事件。
我想知道是否有一种方法可以将每次出现的搜索词保存在 TMemoryStream
中,或者可以使用 EM_STREAMOUT
之类的消息?
现在一切正常,但是当 TRichEdit
文本太大时,重新加载所有文本的大备忘录需要很长时间。我认为最好只记住更改的单词的颜色而不是重新加载所有文本。
我真的是编程的初学者,非常感谢任何帮助。如果不够清楚,请告诉我。
这是我的代码,它正在工作并将背景颜色添加到出现的单词中: ` void SearchInText::searchWordInText(TRichEdit* reTextToSearch, AnsiString strWordToFind) { lstOccurrences->清除();//重置lst
strTextToParse = AnsiReplaceText(strTextToParse, "\r\n", "\n");
int nPrevTagPos = 0;
int nTagPos = strTextToParse.AnsiPos(strWordToFind);
while (nTagPos != 0)
{
int nPosMin = nPrevTagPos + nTagPos - 1;
//List of all the occurrence in the TRichEdit with their position in the text
//It's not a list of int, but it POINT to adresses of INT so it's the same result =)
lstOccurrences->Add((TObject*) nPosMin);
//Change color of background when there is an occurrence
changeBgColor(reTextToSearch, strWordToFind, nPosMin +1, 155, 255, 155); //lime
bColorWasApplied = true;
nPrevTagPos = nPosMin + strWordToFind.Length();
strTextToParse = strTextToParse.SubString(nTagPos + strWordToFind.Length(), strTextToParse.Length());
nTagPos = strTextToParse.AnsiPos(strWordToFind);
}
} `
最佳答案
尝试这样的事情:
#include <vector>
struct WordOccurrence
{
CHARRANGE Range;
CHARFORMAT2 OriginalFormat;
};
std::vector<WordOccurrence> WordOccurrences;
void TMyForm::HighlightWords(const String &WordToFind)
{
// disable the RichEdit's notification messages
int OriginalEventMask = RichEdit1->Perform(EM_SETEVENTMASK, 0, 0);
// disable the RichEdit's painting
RichEdit1->Perform(WM_SETREDRAW, FALSE, 0);
// save the RichEdit's current selection
CHARRANGE OriginalSelection;
RichEdit1->Perform(EM_EXGETSEL, 0, (LPARAM)&OriginalSelection);
// assign values to use while searching
int WordLen = WordToFind.Length();
int TextLen = RichEdit1->GetTextLen();
TSearchTypes SearchTypes = TSearchTypes() << stWholeWord << stMatchCase;
// find the first occurrence of the word
int StartPos = RichEdit1->FindText(WordToFind, 0, TextLen, SearchTypes);
while (StartPos != -1)
{
WordOccurrence Occurrence;
Occurrence.Range.cpMin = StartPos;
Occurrence.Range.cpMax = StartPos + WordLen;
// select the word
RichEdit1->Perform(EM_EXSETSEL, 0, (LPARAM)&Occurrence.Range);
// get the word's current formatting
Occurrence.OriginalFormat.cbSize = sizeof(CHARFORMAT2);
RichEdit1->Perform(EM_GETCHARFORMAT, SCF_SELECTION, (LPARAM)&Occurrence.OriginalFormat);
// save it for later
WordOccurrences.push_back(Occurrence);
// set the word's new formatting
CHARFORMAT2 NewFormat = Occurrence.OriginalFormat;
NewFormat.dwMask |= (CFM_COLOR | CFM_BACKCOLOR);
NewFormat.crTextColor = ...;
newFormat.crBackColor = ...;
RichEdit1->Perform(EM_SETCHARFORMAT, SCF_SELECTION, (LPARAM)&NewFormat);
// find the next occurrence of the word
StartPos = RichEdit1->FindText(WordToFind, Occurrence.Range.cpMax, TextLen - Occurence.Range.cpMax, SearchTypes);
}
// restore the RichEdit's original selection
RichEdit1->Perform(EM_EXSETSEL, 0, (LPARAM)&OriginalSelection);
// re-enable the RichEdit's painting
RichEdit1->Perform(WM_SETREDRAW, TRUE, 0);
RichEdit1->Invalidate();
// re-enable the RichEdit's notification messages
RichEdit1->Perform(EM_SETEVENTMASK, 0, OriginalEventMask);
}
void TMyForm::RestoreHighlightedWords()
{
// are there any occurrences to restore?
if (WordOccurances.empty())
return;
// disable the RichEdit's notification messages
int OriginalEventMask = RichEdit1->Perform(EM_SETEVENTMASK, 0, 0);
// disable the RichEdit's painting
RichEdit1->Perform(WM_SETREDRAW, FALSE, 0);
// save the RichEdit's current selection
CHARRANGE OriginalSelection;
RichEdit1->Perform(EM_EXGETSEL, 0, (LPARAM)&OriginalSelection);
// restore the formatting of each occurrence
for (std::vector<WordOccurrence>::iterator iter = WordOccurrences.begin();
iter != WordOccurrences.end();
++iter)
{
WordOccurrence &occurrence = *iter;
// select the word
RichEdit1->Perform(EM_EXSETSEL, 0, (LPARAM)&occurrence.Range);
// restore the word's original formatting
RichEdit1->Perform(EM_SETCHARFORMAT, SCF_SELECTION, (LPARAM)&occurrence.OriginalFormat);
}
// clear the list
WordOccurances.clear();
// restore the RichEdit's original selection
RichEdit1->Perform(EM_EXSETSEL, 0, (LPARAM)&OriginalSelection);
// re-enable the RichEdit's painting
RichEdit1->Perform(WM_SETREDRAW, TRUE, 0);
RichEdit1->Invalidate();
// re-enable the RichEdit's notification messages
RichEdit1->Perform(EM_SETEVENTMASK, 0, OriginalEventMask);
}
关于c++ - 如何保存 TRichEdit 文本 RTF 的特定部分(c++ codegear),我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/26723403/