116 lines
3.0 KiB
C
116 lines
3.0 KiB
C
// 8 september 2015
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#include "area.h"
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#define areaClass L"libui_uiAreaClass"
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static void doPaint(uiArea *a, uiAreaHandler *ah, HDC dc, RECT *client, RECT *clip)
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{
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uiAreaDrawParams dp;
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dp.Context = newContext(dc);
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dp.ClientWidth = client->right - client->left;
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dp.ClientHeight = client->bottom - client->top;
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dp.ClipX = clip->left;
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dp.ClipY = clip->top;
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dp.ClipWidth = clip->right - clip->left;
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dp.ClipHeight = clip->bottom - clip->top;
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// TODO is this really the best for multimonitor setups?
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dp.DPIX = GetDeviceCaps(dc, LOGPIXELSX);
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dp.DPIY = GetDeviceCaps(dc, LOGPIXELSY);
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/* TODO
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dp.HScrollPos = gtk_adjustment_get_value(ap->ha);
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dp.VScrollPos = gtk_adjustment_get_value(ap->va);
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*/
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(*(ah->Draw))(ah, a, &dp);
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}
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struct areainit {
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uiArea *a;
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uiAreaHandler *ah;
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};
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#define gwlpArea 0
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#define gwlpAreaHandler (sizeof (uiArea *))
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static LRESULT CALLBACK areaWndProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
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{
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uiArea *a;
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uiAreaHandler *ah;
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struct areainit *ai;
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CREATESTRUCTW *cs = (CREATESTRUCTW *) lParam;
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HDC dc;
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PAINTSTRUCT ps;
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RECT client;
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a = (uiArea *) GetWindowLongPtrW(hwnd, gwlpArea);
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ah = (uiAreaHandler *) GetWindowLongPtrW(hwnd, gwlpAreaHandler);
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//TODO if (a == NULL) {
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if (ah == NULL) {
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if (uMsg == WM_NCCREATE) {
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ai = (struct areainit *) (cs->lpCreateParams);
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SetWindowLongPtrW(hwnd, gwlpArea, (LONG_PTR) (ai->a));
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SetWindowLongPtrW(hwnd, gwlpAreaHandler, (LONG_PTR) (ai->ah));
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}
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// fall through to DefWindowProcW() anyway
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return DefWindowProcW(hwnd, uMsg, wParam, lParam);
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}
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switch (uMsg) {
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case WM_PAINT:
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dc = BeginPaint(hwnd, &ps);
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if (dc == NULL)
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logLastError("error beginning paint in areaWndProc");
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if (GetClientRect(hwnd, &client) == 0)
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logLastError("error getting client rect in WM_PAINT in areaWndProc()");
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doPaint(a, ah, dc, &client, &(ps.rcPaint));
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EndPaint(hwnd, &ps);
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return 0;
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case WM_PRINTCLIENT:
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if (GetClientRect(hwnd, &client) == 0)
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logLastError("error getting client rect in WM_PRINTCLIENT in areaWndProc()");
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doPaint(a, ah, (HDC) wParam, &client, &client);
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return 0;
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}
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return DefWindowProc(hwnd, uMsg, wParam, lParam);
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}
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ATOM registerAreaClass(void)
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{
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WNDCLASSW wc;
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ZeroMemory(&wc, sizeof (WNDCLASSW));
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wc.lpszClassName = areaClass;
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wc.lpfnWndProc = areaWndProc;
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wc.hInstance = hInstance;
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//TODO wc.hIcon = hDefaultIcon;
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//TODO wc.hCursor = hDefaultCursor;
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wc.hbrBackground = (HBRUSH) (COLOR_BTNFACE + 1);
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wc.style = CS_HREDRAW | CS_VREDRAW;
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wc.cbWndExtra = sizeof (uiArea *) + sizeof (uiAreaHandler *);
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return RegisterClassW(&wc);
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}
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void unregisterAreaClass(void)
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{
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if (UnregisterClassW(areaClass, hInstance) == 0)
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logLastError("error unregistering uiArea window class in unregisterAreaClass()");
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}
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HWND makeArea(DWORD exstyle, DWORD style, int x, int y, int cx, int cy, HWND parent, uiAreaHandler *ah)
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{
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struct areainit ai;
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ai.a = NULL;
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ai.ah = ah;
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return CreateWindowExW(exstyle,
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areaClass, L"",
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style | WS_HSCROLL | WS_VSCROLL,
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x, y, cx, cy,
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parent, NULL, hInstance, &ai);
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}
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