Hidpi fix (#297)

* Add global error handler for runtime

* Set DPI Aware on windows

app.go

@@ -1,7 +1,9 @@
 package wails
 
 import (
+	"fmt"
 	"os"
+	"runtime"
 	"syscall"
 
 	"github.com/syossan27/tebata"
@@ -65,9 +67,28 @@ func CreateApp(optionalConfig ...*AppConfig) *App {
 		result.config.DisableInspector = true
 	}
 
+	// If running windows, do a hidpi fix
+	if runtime.GOOS == "windows" {
+		err := SetProcessDPIAware()
+		if err != nil {
+			result.log.Fatalf(err.Error())
+		}
+	}
+
 	return result
 }
 
+// SetProcessDPIAware via user32.dll
+// https://docs.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-setprocessdpiaware
+// Also, thanks Jack Mordaynt! https://github.com/wailsapp/wails/issues/293
+func SetProcessDPIAware() error {
+	status, r, err := syscall.NewLazyDLL("user32.dll").NewProc("SetProcessDPIAware").Call()
+	if status == 0 {
+		return fmt.Errorf("exit status %d: %v %v", status, r, err)
+	}
+	return nil
+}
+
 // Run the app
 func (a *App) Run() error {
 

runtime/js/core/main.js

@@ -46,6 +46,16 @@ var runtime = {
 // Augment global
 Object.assign(window.wails, runtime);
 
+// Setup global error handler
+window.onerror = function (msg, url, lineNo, columnNo, error) {
+	window.wails.Log.Error('**** Caught Unhandled Error ****');
+	window.wails.Log.Error('Message: ' + msg);
+	window.wails.Log.Error('URL: ' + url);
+	window.wails.Log.Error('Line No: ' + lineNo);
+	window.wails.Log.Error('Column No: ' + columnNo);
+	window.wails.Log.Error('error: ' + error);
+};
+
 // Emit loaded event
 Emit('wails:loaded');
 

scripts/build.go

@@ -44,6 +44,7 @@ func runCommand(command string, args ...string) {
 	cmd := exec.Command(command, args...)
 	output, err := cmd.CombinedOutput()
 	if err != nil {
+		log.Println(string(output))
 		log.Fatal(err)
 	}
 	cmd.Run()