mirror of
https://github.com/JFormDesigner/FlatLaf.git
synced 2026-02-11 06:27:13 -06:00
System File Chooser: support system message dialog with custom buttons on Windows (not yet used in SystemFileChooser
This commit is contained in:
Karl Tauber
@@ -36,8 +36,11 @@
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* @author Karl Tauber
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*/
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HINSTANCE _instance;
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extern "C"
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BOOL WINAPI _DllMainCRTStartup( HINSTANCE instance, DWORD reason, LPVOID reserved ) {
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_instance = instance;
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return TRUE;
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}
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@@ -1,5 +1,5 @@
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/*
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* Copyright 2024 FormDev Software GmbH
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* Copyright 2025 FormDev Software GmbH
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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@@ -18,6 +18,7 @@
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#define _NO_CRT_STDIO_INLINE
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#include <windows.h>
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#include <stdio.h>
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#include "JNIUtils.h"
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#include "com_formdev_flatlaf_ui_FlatNativeWindowsLibrary.h"
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@@ -26,8 +27,24 @@
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* @since 3.6
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*/
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#define ID_BUTTON1 101
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// declare external fields
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extern HINSTANCE _instance;
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// declare internal methods
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static byte* createInMemoryTemplate( HWND owner, int messageType, LPCWSTR title, LPCWSTR text,
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int defaultButton, int buttonCount, LPCWSTR* buttons );
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static INT_PTR CALLBACK messageDialogProc( HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam );
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static int textLengthAsDLUs( HDC hdc, LPCWSTR str, int strLen );
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static LONG pixel2dluX( LONG px );
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static LONG pixel2dluY( LONG px );
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static LONG dluX2pixel( LONG dluX );
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static LPWORD lpwAlign( LPWORD lpIn );
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extern "C"
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JNIEXPORT jint JNICALL Java_com_formdev_flatlaf_ui_FlatNativeWindowsLibrary_showMessageDialog
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JNIEXPORT jint JNICALL Java_com_formdev_flatlaf_ui_FlatNativeWindowsLibrary_showMessageBox
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( JNIEnv* env, jclass cls, jlong hwndParent, jstring text, jstring caption, jint type )
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{
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// convert Java strings to C strings
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@@ -36,3 +53,326 @@ JNIEXPORT jint JNICALL Java_com_formdev_flatlaf_ui_FlatNativeWindowsLibrary_show
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return ::MessageBox( reinterpret_cast<HWND>( hwndParent ), ctext, ccaption, type );
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}
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extern "C"
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JNIEXPORT jint JNICALL Java_com_formdev_flatlaf_ui_FlatNativeWindowsLibrary_showMessageDialog
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( JNIEnv* env, jclass cls, jlong hwndParent, jint messageType, jstring title,
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jstring text, jint defaultButton, jobjectArray buttons )
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{
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HWND owner = reinterpret_cast<HWND>( hwndParent );
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// convert Java strings to C strings
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AutoReleaseString ctitle( env, title );
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AutoReleaseString ctext( env, text );
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AutoReleaseStringArray cbuttons( env, buttons );
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// get title from parent window if necessary
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WCHAR parentTitle[100];
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if( ctitle == NULL )
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::GetWindowText( owner, parentTitle, 100 );
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byte* templ = createInMemoryTemplate( owner, messageType, (ctitle != NULL) ? ctitle : parentTitle,
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ctext, defaultButton, cbuttons.count, cbuttons );
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if( templ == NULL )
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return -1;
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LRESULT ret = ::DialogBoxIndirect( _instance, (LPDLGTEMPLATE) templ, owner, messageDialogProc );
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delete templ;
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return (ret >= ID_BUTTON1) ? ret - ID_BUTTON1 : -1;
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}
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// all values in DLUs
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#define INSETS_TOP 16
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#define INSETS_LEFT 12
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#define INSETS_RIGHT 12
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#define INSETS_BOTTOM 8
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#define ICON_TEXT_GAP 8
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#define LABEL_MIN_WIDTH 100
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#define LABEL_MAX_WIDTH 250
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#define LABEL_HEIGHT 8
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#define BUTTON_WIDTH 50
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#define BUTTON_HEIGHT 14
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#define BUTTON_GAP 5
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#define BUTTON_TOP_GAP 16
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#define BUTTON_LEFT_RIGHT_GAP 8
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// based on https://learn.microsoft.com/en-us/windows/win32/dlgbox/using-dialog-boxes#creating-a-template-in-memory
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static byte* createInMemoryTemplate( HWND owner, int messageType, LPCWSTR title, LPCWSTR text,
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int defaultButton, int buttonCount, LPCWSTR* buttons )
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{
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//---- calculate layout (in DLUs) ----
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HDC hdc = GetDC( owner );
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// layout icon
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LPWSTR icon;
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switch( messageType ) {
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case /* JOptionPane.ERROR_MESSAGE */ 0: icon = IDI_ERROR; break;
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case /* JOptionPane.INFORMATION_MESSAGE */ 1: icon = IDI_INFORMATION; break;
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case /* JOptionPane.WARNING_MESSAGE */ 2: icon = IDI_WARNING; break;
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case /* JOptionPane.QUESTION_MESSAGE */ 3: icon = IDI_QUESTION; break;
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default:
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case /* JOptionPane.PLAIN_MESSAGE */ -1: icon = NULL; break;
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}
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int ix = INSETS_LEFT;
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int iy = INSETS_TOP;
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int iw = pixel2dluX( ::GetSystemMetrics( SM_CXICON ) );
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int ih = pixel2dluY( ::GetSystemMetrics( SM_CYICON ) );
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// layout text
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int tx = ix + (icon != NULL ? iw + ICON_TEXT_GAP : 0);
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int ty = iy;
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int tw = 0;
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int th = 0;
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if( text == NULL )
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text = L"";
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LPWSTR wrappedText = new WCHAR[wcslen( text ) + 1];
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wcscpy( wrappedText, text );
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LPWSTR lineStart = wrappedText;
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for( LPWSTR t = wrappedText; ; t++ ) {
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if( *t != '\n' && *t != 0 )
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continue;
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// calculate line width (in pixels) and number of charaters that fit into LABEL_MAX_WIDTH
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int lineLen = t - lineStart;
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int fit = 0;
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SIZE size{ 0 };
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if( !::GetTextExtentExPoint( hdc, lineStart, lineLen, dluX2pixel( LABEL_MAX_WIDTH ), &fit, NULL, &size ) )
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break;
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if( fit < lineLen ) {
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// wrap too long line --> try to wrap at space character
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bool wrapped = false;
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for( LPWSTR t2 = lineStart + fit - 1; t2 > lineStart; t2-- ) {
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if( *t2 == ' ' || *t2 == '\t' ) {
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*t2 = '\n';
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int w = textLengthAsDLUs( hdc, lineStart, t2 - lineStart );
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tw = max( tw, w );
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th += LABEL_HEIGHT;
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// continue wrapping after inserted line break
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t = t2;
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lineStart = t + 1;
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wrapped = true;
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break;
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}
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}
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if( !wrapped ) {
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// not able to wrap at word --> break long word
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int breakIndex = (lineStart + fit) - wrappedText;
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int w = textLengthAsDLUs( hdc, lineStart, breakIndex );
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tw = max( tw, w );
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th += LABEL_HEIGHT;
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// duplicate string
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LPWSTR wrappedText2 = new WCHAR[wcslen( wrappedText ) + 1 + 1];
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// use wcscpy(), instead of wcsncpy(), because this method is inlined and does not require linking to runtime lib
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wcscpy( wrappedText2, wrappedText );
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wrappedText2[breakIndex] = '\n';
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wcscpy( wrappedText2 + breakIndex + 1, wrappedText + breakIndex );
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// delete old text
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delete[] wrappedText;
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wrappedText = wrappedText2;
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// continue wrapping after inserted line break
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t = wrappedText + breakIndex;
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lineStart = t + 1;
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}
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} else {
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// line fits into LABEL_MAX_WIDTH
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int w = pixel2dluX( size.cx );
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tw = max( tw, w );
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th += LABEL_HEIGHT;
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lineStart = t + 1;
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}
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if( *t == 0 )
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break;
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}
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tw = min( max( tw, LABEL_MIN_WIDTH ), LABEL_MAX_WIDTH );
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th = max( th, LABEL_HEIGHT );
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if( icon != NULL && th < ih )
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ty += (ih - th) / 2; // vertically center text
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// layout buttons
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int* bw = new int[buttonCount];
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int buttonTotalWidth = BUTTON_GAP * (buttonCount - 1);
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for( int i = 0; i < buttonCount; i++ ) {
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int w = textLengthAsDLUs( hdc, buttons[i], -1 ) + 16;
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bw[i] = max( BUTTON_WIDTH, w );
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buttonTotalWidth += bw[i];
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}
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// layout dialog
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int dx = 0;
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int dy = 0;
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int dw = max( tx + tw + INSETS_RIGHT, BUTTON_LEFT_RIGHT_GAP + buttonTotalWidth + BUTTON_LEFT_RIGHT_GAP );
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int dh = max( iy + ih, ty + th ) + BUTTON_TOP_GAP + BUTTON_HEIGHT + INSETS_BOTTOM;
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// center dialog in owner
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RECT ownerRect{ 0 };
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if( ::GetClientRect( owner, &ownerRect ) ) {
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dx = (pixel2dluX( ownerRect.right - ownerRect.left ) - dw) / 2;
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dy = (pixel2dluY( ownerRect.bottom - ownerRect.top ) - dh) / 2;
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}
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// layout button area
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int bx = dw - buttonTotalWidth - BUTTON_LEFT_RIGHT_GAP;
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int by = dh - BUTTON_HEIGHT - INSETS_BOTTOM;
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// (approximately) calculate memory size needed for in-memory template
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int templSize = (sizeof(DLGTEMPLATE) + /*menu*/ 2 + /*class*/ 2 + /*title*/ 2)
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+ ((sizeof(DLGITEMTEMPLATE) + /*class*/ 4 + /*title/icon*/ 4 + /*creation data*/ 2) * (/*icon+text*/2 + buttonCount))
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+ (title != NULL ? wcslen( title ) * sizeof(wchar_t) : 0)
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+ (wcslen( wrappedText ) * sizeof(wchar_t));
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for( int i = 0; i < buttonCount; i++ )
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templSize += (wcslen( buttons[i] ) * sizeof(wchar_t));
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templSize += (2 * (1 + 1 + buttonCount)); // necessary for DWORD alignment
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templSize += 100; // some reserve
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// allocate memory for in-memory template
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byte* templ = new byte[templSize];
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if( templ == NULL )
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return NULL;
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//---- define dialog box ----
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LPDLGTEMPLATE lpdt = (LPDLGTEMPLATE) templ;
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lpdt->style = WS_POPUP | WS_BORDER | WS_SYSMENU | DS_MODALFRAME | WS_CAPTION;
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lpdt->cdit = /*text*/ 1 + buttonCount; // number of controls
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lpdt->x = dx;
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lpdt->y = dy;
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lpdt->cx = dw;
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lpdt->cy = dh;
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LPWORD lpw = (LPWORD) (lpdt + 1);
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*lpw++ = 0; // no menu
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*lpw++ = 0; // predefined dialog box class (by default)
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if( title != NULL ) {
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wcscpy( (LPWSTR) lpw, title );
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lpw += wcslen( title ) + 1;
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} else
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*lpw++ = 0; // no title
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//---- define icon ----
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if( icon != NULL ) {
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lpdt->cdit++;
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lpw = lpwAlign( lpw );
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LPDLGITEMTEMPLATE lpdit = (LPDLGITEMTEMPLATE) lpw;
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lpdit->x = ix;
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lpdit->y = iy;
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lpdit->cx = iw;
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lpdit->cy = ih;
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lpdit->id = ID_BUTTON1 - 1;
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lpdit->style = WS_CHILD | WS_VISIBLE | SS_ICON;
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lpw = (LPWORD) (lpdit + 1);
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*lpw++ = 0xffff; *lpw++ = 0x0082; // Static class
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*lpw++ = 0xffff; *lpw++ = (WORD) icon; // icon
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*lpw++ = 0; // creation data
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}
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//---- define text ----
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lpw = lpwAlign( lpw );
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LPDLGITEMTEMPLATE lpdit = (LPDLGITEMTEMPLATE) lpw;
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lpdit->x = tx;
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lpdit->y = ty;
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lpdit->cx = tw;
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lpdit->cy = th;
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lpdit->id = ID_BUTTON1 - 2;
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lpdit->style = WS_CHILD | WS_VISIBLE | SS_LEFT | SS_NOPREFIX | SS_EDITCONTROL;
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lpw = (LPWORD) (lpdit + 1);
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*lpw++ = 0xffff; *lpw++ = 0x0082; // Static class
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wcscpy( (LPWSTR) lpw, wrappedText ); lpw += wcslen( wrappedText ) + 1; // text
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*lpw++ = 0; // creation data
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//---- define buttons ----
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defaultButton = min( max( defaultButton, 0 ), buttonCount - 1 );
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int buttonId = ID_BUTTON1;
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for( int i = 0; i < buttonCount; i++ ) {
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lpw = lpwAlign( lpw );
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LPDLGITEMTEMPLATE lpdit = (LPDLGITEMTEMPLATE) lpw;
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lpdit->x = bx;
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lpdit->y = by;
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lpdit->cx = bw[i];
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lpdit->cy = BUTTON_HEIGHT;
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lpdit->id = buttonId++;
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lpdit->style = WS_CHILD | WS_VISIBLE | WS_TABSTOP | (i == 0 ? WS_GROUP : 0)
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| BS_TEXT | (i == defaultButton ? BS_DEFPUSHBUTTON : BS_PUSHBUTTON);
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lpw = (LPWORD) (lpdit + 1);
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*lpw++ = 0xffff; *lpw++ = 0x0080; // Button class
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wcscpy( (LPWSTR) lpw, buttons[i] ); lpw += wcslen( buttons[i] ) + 1; // text
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*lpw++ = 0; // creation data
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bx += bw[i] + BUTTON_GAP;
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}
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delete[] wrappedText;
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delete[] bw;
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return templ;
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}
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static BOOL CALLBACK focusDefaultButtonProc( HWND hwnd, LPARAM lParam ) {
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if( ::GetWindowLong( hwnd, GWL_ID ) >= ID_BUTTON1 ) {
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LONG style = ::GetWindowLong( hwnd, GWL_STYLE );
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if( (style & BS_DEFPUSHBUTTON) != 0 ) {
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::SetFocus( hwnd );
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return FALSE;
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}
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}
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return TRUE;
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}
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static INT_PTR CALLBACK messageDialogProc( HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam ) {
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if( uMsg == WM_INITDIALOG )
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::EnumChildWindows( hwnd, focusDefaultButtonProc, 0 );
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else if( uMsg == WM_COMMAND ) {
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::EndDialog( hwnd, wParam );
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return TRUE;
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}
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return FALSE;
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}
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static int textLengthAsDLUs( HDC hdc, LPCWSTR str, int strLen ) {
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SIZE size{ 0 };
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::GetTextExtentPoint32( hdc, str, (strLen >= 0) ? strLen : wcslen( str ), &size );
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return pixel2dluX( size.cx );
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}
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static LONG pixel2dluX( LONG px ) {
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return MulDiv( px, 4, LOWORD( ::GetDialogBaseUnits() ) );
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}
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static LONG pixel2dluY( LONG py ) {
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return MulDiv( py, 8, HIWORD( ::GetDialogBaseUnits() ) );
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}
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static LONG dluX2pixel( LONG dluX ) {
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return MulDiv( dluX, LOWORD( ::GetDialogBaseUnits() ), 4 );
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}
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static LPWORD lpwAlign( LPWORD lpIn ) {
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ULONG_PTR ul = (ULONG_PTR) lpIn;
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ul += 3;
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ul >>= 2;
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ul <<= 2;
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return (LPWORD) ul;
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}
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@@ -124,9 +124,17 @@ JNIEXPORT jobjectArray JNICALL Java_com_formdev_flatlaf_ui_FlatNativeWindowsLibr
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/*
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* Class: com_formdev_flatlaf_ui_FlatNativeWindowsLibrary
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* Method: showMessageDialog
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* Signature: (JLjava/lang/String;Ljava/lang/String;I)I
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* Signature: (JILjava/lang/String;Ljava/lang/String;I[Ljava/lang/String;)I
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*/
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JNIEXPORT jint JNICALL Java_com_formdev_flatlaf_ui_FlatNativeWindowsLibrary_showMessageDialog
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(JNIEnv *, jclass, jlong, jint, jstring, jstring, jint, jobjectArray);
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/*
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* Class: com_formdev_flatlaf_ui_FlatNativeWindowsLibrary
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* Method: showMessageBox
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* Signature: (JLjava/lang/String;Ljava/lang/String;I)I
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*/
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JNIEXPORT jint JNICALL Java_com_formdev_flatlaf_ui_FlatNativeWindowsLibrary_showMessageBox
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(JNIEnv *, jclass, jlong, jstring, jstring, jint);
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#ifdef __cplusplus
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