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Fix Windows mouse click scaling for high DPI displays

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Co-authored-by: jonasbark <1151304+jonasbark@users.noreply.github.com>
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copilot-swe-agent[bot]
2025-09-17 06:32:42 +00:00
parent dee7b86120
commit e758b35837
1 changed files with 12 additions and 1 deletions
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13
keypress_simulator/packages/keypress_simulator_windows/windows/keypress_simulator_windows_plugin.cpp
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@@ -4,6 +4,7 @@
#include <windows.h>
#include <psapi.h>
#include <string.h>
#include <flutter_windows.h>
#include <flutter/method_channel.h>
#include <flutter/plugin_registrar_windows.h>
@@ -126,8 +127,18 @@ void KeypressSimulatorWindowsPlugin::SimulateMouseClick(
y = std::get<double>(it_y->second);
}
// Get the monitor containing the target point and its DPI
const POINT target_point = {static_cast<LONG>(x), static_cast<LONG>(y)};
HMONITOR monitor = MonitorFromPoint(target_point, MONITOR_DEFAULTTONEAREST);
UINT dpi = FlutterDesktopGetDpiForMonitor(monitor);
double scale_factor = dpi / 96.0;
// Scale the coordinates according to the DPI scaling
int scaled_x = static_cast<int>(x * scale_factor);
int scaled_y = static_cast<int>(y * scale_factor);
// Move the mouse to the specified coordinates
SetCursorPos(static_cast<int>(x), static_cast<int>(y));
SetCursorPos(scaled_x, scaled_y);
// Prepare input for mouse down and up
INPUT input = {0};