A simple, small calculator placed discreetly near the Windows Taskbar or anywhere on the screen
feat: 10pt display font and tighter vertical padding
Font size chosen by the user to visually match the notification-area
clock; DISPLAY_FONT_PT in VisualStyle.cpp is the single knob.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
authored by
Marco Maroni
Claude Fable 5
and committed by
Tangled
(Jul 15, 2026, 1:16 PM +0300)
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CalculatorWindow.cpp
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CalculatorWindow.cpp
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// Size so the CLIENT area fits the display, accounting for caption + borders.
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POINTL ideal = CalcIdealSize();
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LONG clientW = ideal.x + 24; if (clientW < 160) clientW = 160;
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LONG clientH = ideal.y + 14; if (clientH < 28) clientH = 28;
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LONG clientH = ideal.y + 8; if (clientH < 28) clientH = 28;
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RECT r = { 0, 0, clientW, clientH };
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AdjustWindowRectEx(&r, WS_POPUP | WS_CAPTION | WS_SYSMENU, FALSE, WS_EX_TOOLWINDOW);
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SetWindowPos(NULL, 0, 0, r.right - r.left, r.bottom - r.top, SWP_NOMOVE | SWP_NOZORDER);
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VisualStyle.cpp
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VisualStyle.cpp
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#include "VisualStyle.h"
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#include "Utils.h"
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// Point size of the calculator display; the one knob for readability tweaks.
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const int DISPLAY_FONT_PT = 10;
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static LONG DisplayFontHeight()
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{
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HDC hdc = ::GetDC(NULL);
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const LONG h = -::MulDiv(DISPLAY_FONT_PT, ::GetDeviceCaps(hdc, LOGPIXELSY), 72);
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::ReleaseDC(NULL, hdc);
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return h;
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}
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////////////////////////////////////////////////////////////////////////////////
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// Classic visual style
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···
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(::IsVistaOrHigher() ? 0 : sizeof(ncm.iPaddedBorderWidth));
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if(::SystemParametersInfo(SPI_GETNONCLIENTMETRICS, ncm.cbSize, &ncm, 0))
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{
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ncm.lfMessageFont.lfHeight = DisplayFontHeight();
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m_hFont = ::CreateFontIndirect(&ncm.lfMessageFont);
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}
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ATLASSERT(m_hFont);
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···
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if(SUCCEEDED(hr))
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{
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lf.lfHeight = DisplayFontHeight();
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lf.lfWeight = 600;
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m_hFont = ::CreateFontIndirect(&lf);
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ATLASSERT(m_hFont);
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docs/superpowers/plans/2026-07-15-display-font-size.md
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docs/superpowers/plans/2026-07-15-display-font-size.md
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> **For agentic workers:** Single-task plan; executed inline (superpowers:executing-plans). Steps use checkbox (`- [ ]`) syntax for tracking.
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**Goal:** Raise the display font to 14pt (single constant) and shrink the vertical padding so no white band remains under the digits.
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**Goal:** Raise the display font to 10pt (single constant) and shrink the vertical padding so no white band remains under the digits.
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**Architecture:** `DISPLAY_FONT_PT` constant + points→logical helper in `VisualStyle.cpp`, applied in both `CreateFont`s; vertical padding in `CreateStandalone` drops from 14 to 8.
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···
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```cpp
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// Point size of the calculator display; the one knob for readability tweaks.
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const int DISPLAY_FONT_PT = 14;
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const int DISPLAY_FONT_PT = 10;
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static LONG DisplayFontHeight()
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{
···
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```bash
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git add VisualStyle.cpp CalculatorWindow.cpp
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git commit -m "feat: 14pt display font and tighter vertical padding"
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git commit -m "feat: 10pt display font and tighter vertical padding"
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```
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docs/superpowers/specs/2026-07-15-display-font-size-design.md
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docs/superpowers/specs/2026-07-15-display-font-size-design.md
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## Behavior
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- **Font size:** a single constant `DISPLAY_FONT_PT = 14` in `VisualStyle.cpp`.
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- **Font size:** a single constant `DISPLAY_FONT_PT = 10` in `VisualStyle.cpp`.
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Both styles override the height of the font they resolve
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(`lfHeight = -MulDiv(DISPLAY_FONT_PT, LOGPIXELSY, 72)` via a small shared helper):
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- Themed: theme REBAR band font family, weight 600 (unchanged), height forced to 14pt.
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- Classic: `lfMessageFont` family, height forced to 14pt (weight untouched).
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- Themed: theme REBAR band font family, weight 600 (unchanged), height forced to 10pt.
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- Classic: `lfMessageFont` family, height forced to 10pt (weight untouched).
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The constant is the single knob for later size iterations.
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- **Vertical padding:** in `CreateStandalone`, client height goes from `ideal.y + 14` to
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`ideal.y + 8` (covers the EDIT's ~4px `WS_EX_CLIENTEDGE` borders plus minimal
···
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## Testing
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- Engine regression: `tests\build-and-run.cmd` → 16/16 (UI-only).
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- Manual (user): number readable at 14pt; no white band under the digits; window still
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- Manual (user): number readable at 10pt; no white band under the digits; window still
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compact above the tray; caption auto-hide and position persistence unaffected.
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- Iteration expected: if 14pt doesn't convince, change `DISPLAY_FONT_PT` and rebuild.
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- Iteration expected: if 10pt doesn't convince, change `DISPLAY_FONT_PT` and rebuild.
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## Out of scope (YAGNI)
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