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InputText: added comments and somehow clarified the optimized code that calculate text position + updated demo

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ocornut
2015-10-18 10:57:29 +01:00
parent 2b3fb5c0f7
commit bc34ac882f
2 changed files with 32 additions and 18 deletions
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37
imgui.cpp
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@ -7458,35 +7458,38 @@ bool ImGui::InputTextEx(const char* label, char* buf, int buf_size, const ImVec2
{
// Count lines + find lines numbers of cursor and select_start
int matches_remaining = 0;
int matches_line_no[2] = { -1, -999 };
const ImWchar* matches_ptr[2] = { NULL, NULL };
matches_ptr[0] = text_begin + edit_state.StbState.cursor; matches_remaining++;
const ImWchar* searches_input_cursor_ptr[2];
searches_input_cursor_ptr[0] = text_begin + edit_state.StbState.cursor;
searches_input_cursor_ptr[1] = NULL;
int searches_remaining = 1;
int searches_result_line_number[2] = { -1, -999 };
if (edit_state.StbState.select_start != edit_state.StbState.select_end)
{
matches_ptr[1] = text_begin + ImMin(edit_state.StbState.select_start, edit_state.StbState.select_end);
matches_line_no[1] = -1;
matches_remaining++;
searches_input_cursor_ptr[1] = text_begin + ImMin(edit_state.StbState.select_start, edit_state.StbState.select_end);
searches_result_line_number[1] = -1;
searches_remaining++;
}
matches_remaining += is_multiline ? 1 : 0; // So that we never exit the loop until all lines are counted.
// Iterate all lines to find our line numbers
// In multi-line mode, we never exit the loop until all lines are counted, so add one extra to the counter.
searches_remaining += is_multiline ? 1 : 0;
int line_count = 0;
for (const ImWchar* s = text_begin; s < text_end+1; s++)
if ((*s) == '\n' || s == text_end)
{
line_count++;
if (matches_line_no[0] == -1 && s >= matches_ptr[0]) { matches_line_no[0] = line_count; if (--matches_remaining <= 0) break; }
if (matches_line_no[1] == -1 && s >= matches_ptr[1]) { matches_line_no[1] = line_count; if (--matches_remaining <= 0) break; }
if (searches_result_line_number[0] == -1 && s >= searches_input_cursor_ptr[0]) { searches_result_line_number[0] = line_count; if (--searches_remaining <= 0) break; }
if (searches_result_line_number[1] == -1 && s >= searches_input_cursor_ptr[1]) { searches_result_line_number[1] = line_count; if (--searches_remaining <= 0) break; }
}
// Calculate 2d position
IM_ASSERT(matches_line_no[0] != -1);
cursor_offset.x = InputTextCalcTextSizeW(ImStrbolW(matches_ptr[0], text_begin), matches_ptr[0]).x;
cursor_offset.y = matches_line_no[0] * g.FontSize;
if (matches_line_no[1] >= 0)
// Calculate 2d position by finding the beginning of the line and measuring distance
IM_ASSERT(searches_result_line_number[0] != -1);
cursor_offset.x = InputTextCalcTextSizeW(ImStrbolW(searches_input_cursor_ptr[0], text_begin), searches_input_cursor_ptr[0]).x;
cursor_offset.y = searches_result_line_number[0] * g.FontSize;
if (searches_result_line_number[1] >= 0)
{
select_start_offset.x = InputTextCalcTextSizeW(ImStrbolW(matches_ptr[1], text_begin), matches_ptr[1]).x;
select_start_offset.y = matches_line_no[1] * g.FontSize;
select_start_offset.x = InputTextCalcTextSizeW(ImStrbolW(searches_input_cursor_ptr[1], text_begin), searches_input_cursor_ptr[1]).x;
select_start_offset.y = searches_result_line_number[1] * g.FontSize;
}
// Calculate text height