Added code to prepare a state image list of checkboxes for adding checkbox columns to Table on Windows.
This commit is contained in:
Pietro Gagliardi
parent
4a5218df5b
commit
38e7565c37
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@ -3,6 +3,8 @@
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#include "winapi_windows.h"
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#include "_cgo_export.h"
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// TODO eliminate duplicate code
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HBITMAP unscaledBitmap(void *i, intptr_t dx, intptr_t dy)
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{
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BITMAPINFO bi;
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@ -53,7 +55,7 @@ void addImage(HIMAGELIST il, HWND hwnd, HBITMAP bitmap, int origwid, int oright,
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if (winDC == NULL)
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xpanic("error getting DC for window", GetLastError());
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origDC = CreateCompatibleDC(winDC);
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if (winDC == NULL)
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if (origDC == NULL)
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xpanic("error getting DC for original ImageList bitmap", GetLastError());
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prevorig = SelectObject(origDC, bitmap);
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if (prevorig == NULL)
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@ -81,7 +83,7 @@ void addImage(HIMAGELIST il, HWND hwnd, HBITMAP bitmap, int origwid, int oright,
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xpanic("error selecting previous bitmap into scaled image's DC", GetLastError());
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if (DeleteDC(scaledDC) == 0)
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xpanic("error deleting scaled image's DC", GetLastError());
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if (DeleteDC(winDC) == 0)
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if (ReleaseDC(hwnd, winDC) == 0)
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xpanic("error deleting window DC", GetLastError());
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noscale:
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@ -98,3 +100,217 @@ void applyImageList(HWND hwnd, UINT uMsg, WPARAM wParam, HIMAGELIST il)
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;//TODO xpanic("error setting image list", GetLastError());
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// TODO free old one here if any
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}
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static UINT dfcState(int cbstate)
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{
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UINT ret;
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ret = DFCS_BUTTONCHECK;
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if ((cbstate & checkboxStateChecked) != 0)
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ret |= DFCS_CHECKED;
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if ((cbstate & checkboxStateHot) != 0)
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ret |= DFCS_HOT;
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if ((cbstate & checkboxStatePushed) != 0)
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ret |= DFCS_PUSHED;
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return ret;
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}
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static HBITMAP dfcImage(HDC dc, int width, int height, int cbState)
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{
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BITMAPINFO bi;
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VOID *ppvBits;
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HBITMAP bitmap;
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RECT r;
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HDC drawDC;
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HBITMAP prevbitmap;
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r.left = 0;
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r.top = 0;
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r.right = width;
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r.bottom = height;
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ZeroMemory(&bi, sizeof (BITMAPINFO));
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bi.bmiHeader.biSize = sizeof (BITMAPINFOHEADER);
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bi.bmiHeader.biWidth = (LONG) width;
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bi.bmiHeader.biHeight = -((LONG) height); // negative height to force top-down drawing;
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bi.bmiHeader.biPlanes = 1;
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bi.bmiHeader.biBitCount = 32;
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bi.bmiHeader.biCompression = BI_RGB;
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bi.bmiHeader.biSizeImage = (DWORD) (width * height * 4);
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bitmap = CreateDIBSection(NULL, &bi, DIB_RGB_COLORS, &ppvBits, 0, 0);
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if (bitmap == NULL)
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xpanic("error creating HBITMAP for unscaled ImageList image copy", GetLastError());
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drawDC = CreateCompatibleDC(dc);
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if (drawDC == NULL)
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xpanic("error getting DC for checkbox image list bitmap", GetLastError());
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prevbitmap = SelectObject(drawDC, bitmap);
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if (prevbitmap == NULL)
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xpanic("error selecting checkbox image list bitmap into DC", GetLastError());
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if (DrawFrameControl(drawDC, &r, DFC_BUTTON, dfcState(cbState)) == 0)
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xpanic("error drawing checkbox image", GetLastError());
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if (SelectObject(drawDC, prevbitmap) != bitmap)
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xpanic("error selecting previous bitmap into checkbox image's DC", GetLastError());
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if (DeleteDC(drawDC) == 0)
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xpanic("error deleting checkbox image's DC", GetLastError());
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return bitmap;
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}
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HIMAGELIST checkboxImageList = NULL;
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void makeCheckboxImageList_DFC(HWND hwnddc)
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{
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int width, height;
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int cbState;
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HDC dc;
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HIMAGELIST il;
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// there's no real metric around
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// let's use SM_CX/YSMICON and hope for the best
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width = GetSystemMetrics(SM_CXSMICON);
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height = GetSystemMetrics(SM_CYSMICON);
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dc = GetDC(hwnddc);
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if (dc == NULL)
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xpanic("error getting DC for making the checkbox image list", GetLastError());
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checkboxImageList = (*fv_ImageList_Create)(width, height, ILC_COLOR32, 20, 20); // should be reasonable
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if (checkboxImageList == NULL)
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xpanic("error creating checkbox image list", GetLastError());
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for (cbState = 0; cbState < checkboxnStates; cbState++) {
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HBITMAP bitmap;
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bitmap = dfcImage(dc, width, height, cbState);
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if ((*fv_ImageList_Add)(checkboxImageList, bitmap, NULL) == -1)
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xpanic("error adding checkbox image to image list", GetLastError());
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if (DeleteObject(bitmap) == 0)
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xpanic("error deleting checkbox bitmap", GetLastError());
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}
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if (ReleaseDC(hwnddc, dc) == 0)
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xpanic("error deleting checkbox image list DC", GetLastError());
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}
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static HTHEME theme = NULL;
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static void openTheme(HWND hwnd)
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{
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if (theme != NULL)
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// TODO save HRESULT
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if (CloseThemeData(theme) != S_OK)
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xpanic("error closing theme", GetLastError());
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// ignore error; if it can't be done, we can fall back to DrawFrameControl()
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theme = OpenThemeData(hwnd, L"button");
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}
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static int themestates[checkboxnStates] = {
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CBS_UNCHECKEDNORMAL, // 0
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CBS_CHECKEDNORMAL, // checked
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CBS_UNCHECKEDHOT, // hot
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CBS_CHECKEDHOT, // checked | hot
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CBS_UNCHECKEDPRESSED, // pushed
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CBS_CHECKEDPRESSED, // checked | pushed
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CBS_UNCHECKEDPRESSED, // hot | pushed
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CBS_CHECKEDPRESSED, // checked | hot | pushed
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};
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static SIZE getStateSize(HDC dc, int cbState)
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{
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SIZE s;
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// TODO use HRESULT
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if (GetThemePartSize(theme, dc, BP_CHECKBOX, themestates[cbState], NULL, TS_DRAW, &s) != S_OK)
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xpanic("error getting theme part size", GetLastError());
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return s;
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}
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static HBITMAP drawThemeImage(HDC dc, int width, int height, int cbState)
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{
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BITMAPINFO bi;
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VOID *ppvBits;
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HBITMAP bitmap;
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RECT r;
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HDC drawDC;
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HBITMAP prevbitmap;
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r.left = 0;
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r.top = 0;
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r.right = width;
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r.bottom = height;
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ZeroMemory(&bi, sizeof (BITMAPINFO));
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bi.bmiHeader.biSize = sizeof (BITMAPINFOHEADER);
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bi.bmiHeader.biWidth = (LONG) width;
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bi.bmiHeader.biHeight = -((LONG) height); // negative height to force top-down drawing;
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bi.bmiHeader.biPlanes = 1;
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bi.bmiHeader.biBitCount = 32;
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bi.bmiHeader.biCompression = BI_RGB;
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bi.bmiHeader.biSizeImage = (DWORD) (width * height * 4);
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bitmap = CreateDIBSection(NULL, &bi, DIB_RGB_COLORS, &ppvBits, 0, 0);
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if (bitmap == NULL)
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xpanic("error creating HBITMAP for unscaled ImageList image copy", GetLastError());
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drawDC = CreateCompatibleDC(dc);
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if (drawDC == NULL)
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xpanic("error getting DC for checkbox image list bitmap", GetLastError());
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prevbitmap = SelectObject(drawDC, bitmap);
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if (prevbitmap == NULL)
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xpanic("error selecting checkbox image list bitmap into DC", GetLastError());
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// TODO get HRESULT
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if (DrawThemeBackground(theme, drawDC, BP_CHECKBOX, themestates[cbState], &r, NULL) != S_OK)
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xpanic("error drawing checkbox image", GetLastError());
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if (SelectObject(drawDC, prevbitmap) != bitmap)
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xpanic("error selecting previous bitmap into checkbox image's DC", GetLastError());
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if (DeleteDC(drawDC) == 0)
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xpanic("error deleting checkbox image's DC", GetLastError());
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return bitmap;
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}
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void makeCheckboxImageList_theme(HWND hwnddc)
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{
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int width, height;
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int cbState;
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SIZE size;
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HDC dc;
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// first, make sure that all things have the same size
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dc = GetDC(hwnddc);
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if (dc == NULL)
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xpanic("error getting DC for making the checkbox image list", GetLastError());
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size = getStateSize(dc, 0);
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for (cbState = 1; cbState < checkboxnStates; cbState++) {
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SIZE against;
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against = getStateSize(dc, cbState);
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if (size.cx != against.cx || size.cy != against.cy)
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xpanic("size mismatch in checkbox states", GetLastError());
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}
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width = (int) size.cx;
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height = (int) size.cy;
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// NOW draw
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checkboxImageList = (*fv_ImageList_Create)(width, height, ILC_COLOR32, 20, 20); // should be reasonable
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if (checkboxImageList == NULL)
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xpanic("error creating checkbox image list", GetLastError());
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for (cbState = 0; cbState < checkboxnStates; cbState++) {
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HBITMAP bitmap;
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bitmap = drawThemeImage(dc, width, height, cbState);
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if ((*fv_ImageList_Add)(checkboxImageList, bitmap, NULL) == -1)
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xpanic("error adding checkbox image to image list", GetLastError());
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if (DeleteObject(bitmap) == 0)
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xpanic("error deleting checkbox bitmap", GetLastError());
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}
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if (ReleaseDC(hwnddc, dc) == 0)
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xpanic("error deleting checkbox image list DC", GetLastError());
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}
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void makeCheckboxImageList(HWND hwnddc)
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{
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if (theme == NULL) // try to open the theme
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openTheme(hwnddc);
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if (theme != NULL) { // use the theme
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makeCheckboxImageList_theme(hwnddc);
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return;
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}
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// couldn't open; fall back
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makeCheckboxImageList_DFC(hwnddc);
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}
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@ -41,5 +41,6 @@ func (i *imagelist) apply(hwnd C.HWND, uMsg C.UINT, wParam C.WPARAM) {
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for index := range i.list {
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C.addImage(il, hwnd, i.list[index], C.int(i.width[index]), C.int(i.height[index]), width, height)
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}
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C.applyImageList(hwnd, uMsg, wParam, il)
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// C.applyImageList(hwnd, uMsg, wParam, il)
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C.applyImageList(hwnd, uMsg, wParam, C.checkboxImageList)
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}
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@ -78,6 +78,10 @@ static LRESULT CALLBACK msgwinproc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM l
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if (sharedWndProc(hwnd, uMsg, wParam, lParam, &shared))
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return shared;
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switch (uMsg) {
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case WM_CREATE:
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// initial
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makeCheckboxImageList(hwnd);
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return 0;
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case msgRequest:
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doissue((void *) lParam);
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return 0;
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@ -21,6 +21,8 @@
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#include <string.h>
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#include <wchar.h>
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#include <windowsx.h>
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#include <vsstyle.h>
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#include <vssym32.h>
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// global messages unique to everything
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enum {
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@ -119,5 +121,13 @@ extern HBITMAP unscaledBitmap(void *, intptr_t, intptr_t);
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extern HIMAGELIST newImageList(int, int);
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extern void addImage(HIMAGELIST, HWND, HBITMAP, int, int, int, int);
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extern void applyImageList(HWND, UINT, WPARAM, HIMAGELIST);
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enum {
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checkboxStateChecked = 1 << 0,
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checkboxStateHot = 1 << 1,
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checkboxStatePushed = 1 << 2,
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checkboxnStates = 1 << 3,
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};
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extern HIMAGELIST checkboxImageList;
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extern void makeCheckboxImageList(HWND);
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#endif
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