输入框鼠标编辑、图例省略、信号跨视图共享选择与网格菜单布局修复

- 输入框：支持鼠标左键点击定位插入符、拖拽框选区域，并且不再限制字符长度 - 输入框：长文本使用 ETO_CLIPPED 裁剪绘制，避免字符溢出到编辑区域之外 - 图例：信号名称超过 200px 时省略号截断，不再挤压标尺区域 - 选中状态从 TabConfig 迁移到 DataSet，切换视图后信号选中状态保持一致 - 网格右键菜单：Y 轴最大值/最小值直接显示当前值，点击后原位置弹出内联编辑框 - 标尺数值改为绘制在图例下层，不再因避让图例而隐藏 - 移除已无用的 LegendBandRect，新增共享的编辑框布局与命中检测工具 - .gitignore 忽略 TestData 测试数据目录
2026-09-30 17:10:23 +08:00
1 parent e3744f3eff
commit 12b3531485
@@ -428,6 +428,101 @@ namespace jdi
 		              knobRadius * 2.0f);
 	}

+	float UiEditTextLeft(const gd::RectF& rect, const TextEdit& edit, HFONT font, float scale,
+	                     float& innerWidth)
+	{
+		innerWidth = std::max(4.0f, rect.Width - 12.0f * scale);
+		const float textLeft = rect.X + 6.0f * scale;
+
+		const std::wstring& text = edit.Text();
+		if (text.empty())
+		{
+			return textLeft;
+		}
+
+		const float textWidth = UiMeasureTextWidth(font, text);
+		if (textWidth <= innerWidth)
+		{
+			return textLeft;
+		}
+
+		// 保证插入符可见：插入符超出右边界时向左滚动，并夹到总可滚动范围内。
+		const float caretX = UiMeasureTextWidth(font, text.substr(0, edit.Caret()));
+		float scroll = 0.0f;
+		if (caretX > innerWidth)
+		{
+			scroll = caretX - innerWidth;
+		}
+		const float maximum = textWidth - innerWidth;
+		scroll = std::max(0.0f, std::min(scroll, maximum));
+		return textLeft - scroll;
+	}
+
+	std::size_t UiEditOffsetAt(HFONT font, const std::wstring& text, float localX)
+	{
+		if (text.empty() || font == nullptr)
+		{
+			return 0;
+		}
+		if (localX <= 0.0f)
+		{
+			return 0;
+		}
+
+		// 逐字符累加宽度，找到距离最近的字符边界（文本通常很短，线性扫描足够）。
+		float previous = 0.0f;
+		for (std::size_t index = 0; index < text.size(); ++index)
+		{
+			const float current = UiMeasureTextWidth(font, text.substr(0, index + 1));
+			if (localX < current)
+			{
+				// 落在本字符的左半 → 取左边界，右半 → 取右边界。
+				return (localX - previous <= current - localX) ? index : (index + 1);
+			}
+			previous = current;
+		}
+		return text.size();
+	}
+
+	void UiTextAtClipped(gd::Graphics& g, const std::wstring& text, HFONT font, float x, const gd::RectF& rect,
+	                     std::uint32_t argb, const gd::RectF& clipRect)
+	{
+		if (text.empty() || font == nullptr || clipRect.Width <= 0.0f || clipRect.Height <= 0.0f)
+		{
+			return;
+		}
+
+		HDC hdc = g.GetHDC();
+		if (hdc == nullptr)
+		{
+			return;
+		}
+
+		HGDIOBJ oldFont = SelectObject(hdc, font);
+		const int oldMode = SetBkMode(hdc, TRANSPARENT);
+		const COLORREF oldColor = SetTextColor(hdc, ToColorRef(argb));
+
+		TEXTMETRICW metrics = {};
+		GetTextMetricsW(hdc, &metrics);
+		const int baselineY = static_cast<int>(
+		    std::floor(rect.Y + (rect.Height - static_cast<float>(metrics.tmHeight)) * 0.5f));
+
+		RECT clip = {};
+		clip.left = static_cast<LONG>(std::floor(clipRect.X));
+		clip.top = static_cast<LONG>(std::floor(clipRect.Y));
+		clip.right = static_cast<LONG>(std::ceil(clipRect.X + clipRect.Width));
+		clip.bottom = static_cast<LONG>(std::ceil(clipRect.Y + clipRect.Height));
+
+		// ETO_CLIPPED 让 GDI 在指定矩形内裁剪，长文本不会再画到输入框之外。
+		ExtTextOutW(hdc, static_cast<int>(std::floor(x)), baselineY, ETO_CLIPPED, &clip, text.c_str(),
+		            static_cast<UINT>(text.size()), nullptr);
+
+		SetTextColor(hdc, oldColor);
+		SetBkMode(hdc, oldMode);
+		SelectObject(hdc, oldFont);
+		g.ReleaseHDC(hdc);
+	}
+
 	void UiDrawEditField(gd::Graphics& g, const gd::RectF& rect, const TextEdit& edit, HFONT font, float scale)
 	{
 		if (rect.Width <= 0.0f || rect.Height <= 0.0f || font == nullptr)
@@ -442,70 +537,52 @@ namespace jdi
 		UiDrawRoundRect(g, rect, corner, theme.accent, 1.6f);

 		const std::wstring& text = edit.Text();
+		const float innerLeft = rect.X + 6.0f * scale;
+
+		float innerWidth = 0.0f;
+		const float textLeft = UiEditTextLeft(rect, edit, font, scale, innerWidth);
+		const gd::RectF clipRect(innerLeft, rect.Y + 1.0f * scale, innerWidth, rect.Height - 2.0f * scale);
+
 		if (text.empty())
 		{
 			// 空内容仍绘制插入符，保持焦点可见。
-			const float caretX = rect.X + 6.0f * scale;
-			UiDrawLine(g, caretX, rect.Y + 4.0f * scale, caretX, rect.Y + rect.Height - 4.0f * scale,
+			UiDrawLine(g, textLeft, rect.Y + 4.0f * scale, textLeft, rect.Y + rect.Height - 4.0f * scale,
 			           theme.accent, 1.4f * scale);
 			return;
 		}

-		const float innerLeft = rect.X + 6.0f * scale;
-		const float innerWidth = std::max(4.0f, rect.Width - 12.0f * scale);
-
 		// 光标与选区端点对应的像素位置（以文本左端为原点）。
-		const float caretX = UiTextWidth(g, text.substr(0, edit.Caret()), font);
+		const float caretX = UiMeasureTextWidth(font, text.substr(0, edit.Caret()));
 		const float selBeginX =
-		    edit.HasSelection() ? UiTextWidth(g, text.substr(0, edit.SelectionBegin()), font) : 0.0f;
+		    edit.HasSelection() ? UiMeasureTextWidth(font, text.substr(0, edit.SelectionBegin())) : 0.0f;
 		const float selEndX =
-		    edit.HasSelection() ? UiTextWidth(g, text.substr(0, edit.SelectionEnd()), font) : 0.0f;
-		const float textWidth = UiTextWidth(g, text, font);
+		    edit.HasSelection() ? UiMeasureTextWidth(font, text.substr(0, edit.SelectionEnd())) : 0.0f;

-		// 内容超出可视宽度时横向滚动，保证光标始终可见（向常规输入框靠齐）。
-		float scroll = 0.0f;
-		if (textWidth > innerWidth)
-		{
-			if (caretX > innerWidth)
-			{
-				scroll = caretX - innerWidth;
-			}
-			const float maximum = textWidth - innerWidth;
-			scroll = std::max(0.0f, std::min(scroll, maximum));
-		}
+		const bool fullSelection =
+		    edit.HasSelection() && edit.SelectionBegin() == 0 && edit.SelectionEnd() == text.size();

-		const gd::RectF clipRect(innerLeft, rect.Y + 1.0f * scale, innerWidth, rect.Height - 2.0f * scale);
 		const int saveState = g.Save();
 		g.SetClip(clipRect, gd::CombineModeIntersect);

-		const float textLeft = innerLeft - scroll;
-
-		// 选区高亮绘制在文本之下，整段选中时呈现“已全选”观感。
-		const bool fullSelection = edit.HasSelection() && edit.SelectionBegin() == 0 &&
-		                           edit.SelectionEnd() == text.size();
+		// 选区高亮绘制在文本之下，整段选中时呈现“已全选”观感；
+		// 叠加上 GDI+ 裁剪，高亮同样不会越过输入框边界。
 		if (edit.HasSelection() && selEndX > selBeginX)
 		{
-			const gd::RectF highlight(textLeft + selBeginX, rect.Y + 3.0f * scale,
-			                          selEndX - selBeginX, rect.Height - 6.0f * scale);
+			const gd::RectF highlight(textLeft + selBeginX, rect.Y + 3.0f * scale, selEndX - selBeginX,
+			                          rect.Height - 6.0f * scale);
 			UiFillRect(g, highlight, theme.accent);
 		}

-		UiText(g, text, font, gd::RectF(textLeft, rect.Y, std::max(textWidth, innerWidth), rect.Height),
-		       theme.textStrong, TextAlign::LEFT);
+		// 长文本用 ETO_CLIPPING 交给 GDI 裁剪，避免字符画到输入框之外。
+		UiTextAtClipped(g, text, font, textLeft, rect,
+		                fullSelection ? theme.textOnAccent : theme.textStrong, clipRect);

-		if (edit.HasSelection() && !fullSelection && selEndX > selBeginX)
+		if (!fullSelection && edit.HasSelection() && selEndX > selBeginX)
 		{
 			// 局部选区：在反白底衬上重绘被选中的片段，其余文字保持常规颜色。
 			const std::wstring selected =
 			    text.substr(edit.SelectionBegin(), edit.SelectionEnd() - edit.SelectionBegin());
-			UiText(g, selected, font,
-			       gd::RectF(textLeft + selBeginX, rect.Y, selEndX - selBeginX, rect.Height),
-			       theme.textOnAccent, TextAlign::LEFT);
-		}
-		else if (fullSelection)
-		{
-			UiText(g, text, font, gd::RectF(textLeft, rect.Y, std::max(textWidth, innerWidth), rect.Height),
-			       theme.textOnAccent, TextAlign::LEFT);
+			UiTextAtClipped(g, selected, font, textLeft + selBeginX, rect, theme.textOnAccent, clipRect);
 		}

 		// 插入符。
@@ -516,6 +593,36 @@ namespace jdi
 		g.Restore(saveState);
 	}

+	bool UiEditFieldMouseDown(HFONT font, const gd::RectF& rect, TextEdit& edit, float scale, int x, int y)
+	{
+		if (!edit.Active() || font == nullptr || rect.Width <= 0.0f)
+		{
+			return false;
+		}
+		if (!UiPointInRect(rect, static_cast<float>(x), static_cast<float>(y)))
+		{
+			return false;
+		}
+
+		// 用与绘制完全相同的布局函数换算文本起点，保证点哪儿光标就落在哪儿。
+		float innerWidth = 0.0f;
+		const float textLeft = UiEditTextLeft(rect, edit, font, scale, innerWidth);
+		edit.BeginDrag(UiEditOffsetAt(font, edit.Text(), static_cast<float>(x) - textLeft));
+		return true;
+	}
+
+	bool UiEditFieldMouseMove(HFONT font, const gd::RectF& rect, TextEdit& edit, float scale, int x)
+	{
+		if (!edit.Active() || !edit.Dragging() || font == nullptr || rect.Width <= 0.0f)
+		{
+			return false;
+		}
+
+		float innerWidth = 0.0f;
+		const float textLeft = UiEditTextLeft(rect, edit, font, scale, innerWidth);
+		return edit.UpdateDrag(UiEditOffsetAt(font, edit.Text(), static_cast<float>(x) - textLeft));
+	}
+
 	bool UiSwatchNeedsOutline(float opacity)
 	{
 		return !(opacity >= kSwatchOutlineOpacity);